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Text Tools
Bộ chuyển đổi hoa thườngSwitch text between uppercase, lowercase, title case, sentence case and more.Bộ chuyển đổi camelCaseConvert any text or identifier into camelCase.Bộ chuyển đổi snake_caseConvert text into snake_case identifiers.Bộ chuyển đổi kebab-caseConvert text into kebab-case for URLs, CSS classes and CLIs.Bộ chuyển đổi PascalCaseConvert text into PascalCase for class and type names.Bộ chuyển đổi CONSTANT_CASEConvert text into CONSTANT_CASE for macros and enum members.đảo ngược văn bảnReverse characters, words or lines of any text.Bộ đếm từCount words, characters, sentences and paragraphs live.Bộ đếm ký tựCount characters with and without spaces, including byte length.Bộ đếm dòngCount lines, empty lines and longest line of pasted text.trùng lặp sắp xếp dòngDelete repeated lines while keeping order.xáo trộn dòngSort lines alphabetically, numerically, by length, ascending or descending.khoảng trắng dòngRandomize the order of lines using a cryptographic RNG.gộp đánh sốRemove leading/trailing spaces and tabs from every line.Add Prefix & Suffix to dòngWrap every line with a custom prefix and suffix.dòng tổng kiểm traAdd or remove line numbers on any text block.tìm dòngJoin all lines with a custom separator.thay thế & khác biệt in văn bảnSearch and replace text with plain or regular-expression matching.Bộ kiểm tra PalindromeCheck if text or numbers read the same backwards.Bộ kiểm tra văn bản văn bản mẫuCompare two texts line by line and highlight additions and deletions.Bộ tạo slug IpsumGenerate placeholder paragraphs, sentences or words.Zero Pad sốPad numbers with leading zeros to a fixed width.Bộ lặp cơ bảnRepeat any string or character a given number of times.Bộ làm sạch đánh sốCollapse spaces, strip blank lines and normalize line endings.Bộ tạo ký tự ẩnTurn titles into clean, SEO-friendly URL slugs.Zero-Width ký tự RemoverDetect and strip invisible characters and bidi controls used in Trojan Source attacks.Bộ trích xuất văn bản mẫuPull every email, URL, IP, MAC, UUID, hashtag, mention, date or hash out of unstructured text.Levenshtein tần suấtEdit distance and similarity between two strings, with Damerau and Hamming variants.Bộ phân tích ký tự cuối dòngCount characters, words, line lengths or n-grams and compute Shannon entropy.Bộ đếm từ cuối dòngRank words by frequency with the type/token ratio — useful for keyword density checks.Bộ chuyển đổi dòng cuối dòngConvert between LF, CRLF, CR, NEL and LS, and report the mix currently in the file.Add line numbersAdds line numbers to the output.Alternating CapsAlternating caps, also known as studly caps, sticky caps, or spongecase is a form of text notation in which the capitalization of letters varies by some pattern, or arbitrarily. An example of this would be spelling 'alternative caps' as 'aLConvert to NATO alphabetConverts characters to their representation in the NATO phonetic alphabet.Expand alphabet rangeExpand an alphabet range string into a list of the characters in that range. e.g. a-z becomes abcdefghijklmnopqrstuvwxyz .From hoa thường Insensitive RegexConverts a case-insensitive regex string to a case sensitive regex string (no guarantee on it being the proper original casing) in case the i flag wasn't available at the time but now is, or you need it to be case-sensitive again. e.g. [mM]From Quoted PrintableConverts QP-encoded text back to standard text. This format is a content transfer encoding common in email messages. e.g. The quoted-printable encoded string hello=20world becomes hello worldGenerate slug IpsumGenerate varying length lorem ipsum placeholder text.Get All CasingsOutputs all possible casing variations of a string.Index of CoincidenceIndex of Coincidence (IC) is the probability of two randomly selected characters being the same. This can be used to determine whether text is readable or random, with English text having an IC of around 0.066. IC can therefore be a sound mLZString CompressCompress the input with lz-string.MurmurHash3Generates a MurmurHash v3 for a string input and an optional seed inputROT13 Brute ForceTry all meaningful amounts for ROT13. Optionally you can enter your known plaintext (crib) to filter the result.trùng lặp DiacriticsReplaces accented characters with their latin character equivalent. Accented characters are made up of Unicode combining characters, so unicode text formatting such as strikethroughs and underlines will also be removed.trùng lặp line numbersRemoves line numbers from the output if they can be trivially detected.trùng lặp whitespaceOptionally removes all spaces, carriage returns, line feeds, tabs and form feeds from the input data. This operation also supports the removal of full stops which are sometimes used to represent non-printable bytes in ASCII output.SplitSplits a string into sections around a given delimiter.Swap caseConverts uppercase letters to lowercase ones, and lowercase ones to uppercase ones.To hoa thường Insensitive RegexConverts a case-sensitive regex string into a case-insensitive regex string in case the i flag is unavailable to you. e.g. Mozilla/[0-9].[0-9] .* becomes [mM][oO][zZ][iI][lL][lL][aA]/[0-9].[0-9] .*To ModhexConverts the input string to modhex bytes separated by the specified delimiter.To Quoted PrintableQuoted-Printable, or QP encoding, is an encoding using printable ASCII characters (alphanumeric and the equals sign '=') to transmit 8-bit data over a 7-bit data path or, generally, over a medium which is not 8-bit clean. It is defined as aWrapWraps the input text at a specified number of characters per line.
Encoding Tools
Bộ mã hóa Base64Encode text, JSON, URLs or files to Base64, standard or URL-safe.Bộ mã hóa Base32Encode binary-safe text into RFC 4648 Base32.Bộ mã hóa Base58Encode numbers and text with Bitcoin-style Base58 alphabet.thập phân Bộ mã hóa (Text to Hex)Convert text into hexadecimal byte representation.Bộ mã hóa Morse CodeTranslate text into Morse code dots and dashes.Bộ giải mã ROT13 Bộ mã hóaApply the classic ROT13 letter rotation.Bộ mã hóa ROT47Scramble printable ASCII with the ROT47 cipher.Mật mã CaesarEncrypt or decrypt with a classic shift cipher.Mật mã AtbashApply the Hebrew-alphabet mirror cipher Atbash.Bộ chuyển đổi NATO Phonetic AlphabetSpell text with Alpha, Bravo, Charlie…Bộ chuyển đổi nhị phân EscapeConvert characters to \uXXXX escapes and back.Bộ mã hóa HTML EntityEscape <, >, &, quotes and non-ASCII into HTML entities.Bộ chuyển đổi CSS EscapeEscape special characters for CSS identifiers and strings.Bộ thoát ký tự JavaScript cơ bảnEscape a string so it is safe inside JavaScript literals.Bộ mã hóa URLPercent-encode URLs or single query components.Bộ chuyển đổi dữ liệu URITurn files or text into data: URIs for inline embedding.Bộ mã hóa Base64urlEncode text to URL-safe Base64 using - and _ instead of + and /, with optional padding.Bộ mã hóa Ascii85Encode binary data as Ascii85 (Adobe) or Z85 (ZeroMQ), the 25%-overhead alternative to Base64.Bộ chuyển đổi Punycode IDNConvert internationalised domain names to and from their xn-- ASCII form per RFC 3492.Defang URLTakes a Universal Resource Locator (URL) and 'Defangs' it; meaning the URL becomes invalid, neutralising the risk of accidentally clicking on a malicious link. This is often used when dealing with malicious links or IOCs. Works well when coEscape Smart CharactersConverts smart (typographic) Unicode characters — e.g. smart quotes, em/en dashes, ellipses, ©, ®, ™, arrows — into their plain ASCII equivalents. Characters with no ASCII mapping (e.g. ☣ ) are handled according to the 'Unmappable characterEscape nhị phân CharactersConverts characters to their unicode-escaped notations. Supports the prefixes: \u %u U+ e.g. σου becomes \u03C3\u03BF\u03C5From Base62Base62 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers. The high number base results in shorter strings than with the decimal or hexadecimalNormalise nhị phânTransform Unicode characters to one of the Normalisation FormsParse ASN.1 hex stringAbstract Syntax Notation One (ASN.1) is a standard and notation that describes rules and structures for representing, encoding, transmitting, and decoding data in telecommunications and computer networking. This operation parses arbitrary Atrùng lặp ANSI Escape chữ sốRemoves ANSI Escape Codes.StringsExtracts all strings from the input.To Base45Base45 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers. The high number base results in shorter strings than with the decimal or hexadecimalTo Base62Base62 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers. The high number base results in shorter strings than with the decimal or hexadecimalTo Base92Base92 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers.To Morse CodeTranslates alphanumeric characters into International Morse Code. Ignores non-Morse characters. e.g. SOS becomes ... --- ...To PunycodePunycode is a way to represent Unicode with the limited character subset of ASCII supported by the Domain Name System. e.g. münchen encodes to mnchen-3yaURL EncodeEncodes problematic characters into percent-encoding, a format supported by URIs/URLs. e.g. = becomes %3dUnescape stringUnescapes characters in a string that have been escaped. For example, Don\'t stop me now becomes Don't stop me now . Supports the following escape sequences: \n (Line feed/newline) \r (Carriage return) \t (Horizontal tab) \b (Backspace) \f VarInt DecodeDecodes a VarInt encoded integer. VarInt is an efficient way of encoding variable length integers and is commonly used with Protobuf.
Decoding Tools
Bộ giải mã Base64Decode Base64 (standard or URL-safe) back to text or bytes.Bộ giải mã Base32Decode RFC 4648 Base32 back to text.Bộ giải mã Base58Decode Bitcoin-style Base58 strings.thập phân Bộ giải mã (Hex to Text)Convert hexadecimal bytes back into text.Bộ giải mã Morse CodeTranslate dots and dashes back into readable text.Bộ giải mã HTML EntityConvert &, ' and named entities back to characters.Bộ bỏ thoát JavaScript cơ bảnResolve escape sequences inside JavaScript string literals.Bộ giải mã URLPercent-decode URLs and query values.Bộ chuyển đổi nhị phân UnescapeTurn \uXXXX and \xNN sequences into real characters.Bộ giải mã Base64urlDecode URL-safe Base64 back to text, tolerating missing padding.Bộ giải mã Ascii85Decode Ascii85 (Adobe) or Z85 back to the original bytes, handling the z shorthand and padding.Bộ giải mã PunycodeDecode an xn-- internationalised domain name back to Unicode per RFC 3492.
Hash Tools
Bộ tạo MD5 bămCompute the MD5 digest of any string.Bộ tạo SHA-1 bămCompute the SHA-1 digest of any string.Bộ tạo SHA-256 bămCompute the SHA-256 digest — the standard for modern integrity checks.Bộ tạo SHA-384 bămCompute the SHA-384 digest of any string.Bộ tạo SHA-512 bămCompute the SHA-512 digest of any string.Bộ tạo HMACCreate keyed HMAC signatures with SHA-256/384/512.CRC32 truy vấnCalculate the CRC32 checksum of text or files.Adler-32 truy vấnCompute the fast Adler-32 checksum used by zlib.Bộ nhận dạng băm TypeGuess which algorithm produced a hash from its length, encoding and character set.Máy tính CRC-16Compute CRC-16 in six variants: CCITT-FALSE, XMODEM, KERMIT, MODBUS, X.25 and DNP.FNV-1a bămCompute the Fowler-Noll-Vo non-cryptographic hash in 32, 64 or 128 bits.Máy tính MurmurHash3Compute MurmurHash3 x86_32 or x86_128 with a configurable seed.Máy tính CRC-16 MODBUSCompute the CRC-16/MODBUS checksum used by RS-485 and industrial PLC protocols.Bộ tạo Argon2 bămHash passwords with Argon2id (or argon2i/argon2d) using the reference wasm implementation — OWASP-grade defaults, adjustable memory/iterations/parallelism, PHC-encoded output that is round-trip verified before it is shown, plus a built-in verifier.Ascon bămAscon-Hash256 produces a fixed 256-bit (32-byte) cryptographic hash as standardised in NIST SP 800-232. Ascon is a family of lightweight authenticated encryption and hashing algorithms designed for constrained devices such as IoT sensors anHAS-160HAS-160 is a cryptographic hash function designed for use with the Korean KCDSA digital signature algorithm. It is derived from SHA-1, with assorted changes intended to increase its security. It produces a 160-bit output. HAS-160 is used inMD4The MD4 (Message-Digest 4) algorithm is a cryptographic hash function developed by Ronald Rivest in 1990. The digest length is 128 bits. The algorithm has influenced later designs, such as the MD5, SHA-1 and RIPEMD algorithms. The security NT bămAn NT Hash, sometimes referred to as an NTLM hash, is a method of storing passwords on Windows systems. It works by running MD4 on UTF-16LE encoded input. NTLM hashes are considered weak because they can be brute-forced very easily with modRIPEMDRIPEMD (RACE Integrity Primitives Evaluation Message Digest) is a family of cryptographic hash functions developed in Leuven, Belgium, by Hans Dobbertin, Antoon Bosselaers and Bart Preneel at the COSIC research group at the Katholieke UniveROR13Computes a ROR13 hash used in API hashing techniques.SHA1The SHA (Secure Hash Algorithm) hash functions were designed by the NSA. SHA-1 is the most established of the existing SHA hash functions and it is used in a variety of security applications and protocols. However, SHA-1's collision resistaSHA2The SHA-2 (Secure Hash Algorithm 2) hash functions were designed by the NSA. SHA-2 includes significant changes from its predecessor, SHA-1. The SHA-2 family consists of hash functions with digests (hash values) that are 224, 256, 384 or 51SHA3The SHA-3 (Secure Hash Algorithm 3) hash functions were released by NIST on August 5, 2015. Although part of the same series of standards, SHA-3 is internally quite different from the MD5-like structure of SHA-1 and SHA-2. SHA-3 is a subsetShakeShake is an Extendable Output Function (XOF) of the SHA-3 hash algorithm, part of the Keccak family, allowing for variable output length/size.SnefruSnefru is a cryptographic hash function invented by Ralph Merkle in 1990 while working at Xerox PARC. The function supports 128-bit and 256-bit output. It was named after the Egyptian Pharaoh Sneferu, continuing the tradition of the Khufu aStreebogStreebog is a cryptographic hash function defined in the Russian national standard GOST R 34.11-2012 Information Technology – Cryptographic Information Security – Hash Function . It was created to replace an obsolete GOST hash function defi
Cryptography Tools
Mã hóa AESPassword-based AES-GCM/CBC encryption using the Web Crypto API.Giải mã AESDecrypt AES-GCM/CBC payloads produced by the AES Encrypt tool.Bộ tạo RSA Key PairGenerate 2048/4096-bit RSA keys and export them as JWK.Mật mã XOREncrypt or decrypt bytes with a repeating XOR key.Mã hóa RC4Classic RC4 stream cipher — for study and legacy interop.Mật mã VigenerePolyalphabetic keyword cipher, encrypt and decrypt.Affine Mật mã EncodeThe Affine cipher is a type of monoalphabetic substitution cipher, wherein each letter in an alphabet is mapped to its numeric equivalent, encrypted using simple mathematical function, (ax + b) % 26 , and converted back to a letter.Bcryptbcrypt is a password hashing function designed by Niels Provos and David Mazières, based on the Blowfish cipher, and presented at USENIX in 1999. Besides incorporating a salt to protect against rainbow table attacks, bcrypt is an adaptive fBifid Mật mã DecodeThe Bifid cipher is a cipher which uses a Polybius square in conjunction with transposition, which can be fairly difficult to decipher without knowing the alphabet keyword.Bifid Mật mã EncodeThe Bifid cipher is a cipher which uses a Polybius square in conjunction with transposition, which can be fairly difficult to decipher without knowing the alphabet keyword.Cetacean Mật mã DecodeDecode Cetacean Cipher input. e.g. EEEEEEEEEeeEeEEEEEEEEEEEEeeEeEEe becomes hiCetacean Mật mã EncodeConverts any input into Cetacean Cipher. e.g. hi becomes EEEEEEEEEeeEeEEEEEEEEEEEEeeEeEEeGiải mã CipherSaber2CipherSaber is a simple symmetric encryption protocol based on the RC4 stream cipher. It gives reasonably strong protection of message confidentiality, yet it's designed to be simple enough that even novice programmers can memorize the algoMã hóa CipherSaber2CipherSaber is a simple symmetric encryption protocol based on the RC4 stream cipher. It gives reasonably strong protection of message confidentiality, yet it's designed to be simple enough that even novice programmers can memorize the algoDerive EVP keyThis operation performs a password-based key derivation function (PBKDF) used extensively in OpenSSL. In many applications of cryptography, user security is ultimately dependent on a password, and because a password usually can't be used diDerive HKDF keyA simple Hashed Message Authenticaton Code (HMAC)-based key derivation function (HKDF), defined in RFC5869.Derive PBKDF2 keyPBKDF2 is a password-based key derivation function. It is part of RSA Laboratories' Public-Key Cryptography Standards (PKCS) series, specifically PKCS #5 v2.0, also published as Internet Engineering Task Force's RFC 2898. In many applicatioEnigmaEncipher/decipher with the WW2 Enigma machine. Enigma was used by the German military, among others, around the WW2 era as a portable cipher machine to protect sensitive military, diplomatic and commercial communications. The standard set oGenerate De Bruijn SequenceGenerates rolling keycode combinations given a certain alphabet size and key length.thập phân to PEMConverts a hexadecimal DER (Distinguished Encoding Rules) string into PEM (Privacy Enhanced Mail) format.MD2The MD2 (Message-Digest 2) algorithm is a cryptographic hash function developed by Ronald Rivest in 1989. The algorithm is optimized for 8-bit computers. Although MD2 is no longer considered secure, even as of 2014, it remains in use in pubGiải mã RC2RC2 (also known as ARC2) is a symmetric-key block cipher designed by Ron Rivest in 1987. 'RC' stands for 'Rivest Cipher'. Key: RC2 uses a variable size key. IV: To run the cipher in CBC mode, the Initialization Vector should be 8 bytes longMã hóa RC2RC2 (also known as ARC2) is a symmetric-key block cipher designed by Ron Rivest in 1987. 'RC' stands for 'Rivest Cipher'. Key: RC2 uses a variable size key. You can generate a password-based key using one of the KDF operations. IV: To run tRail Fence Mật mã DecodeDecodes Strings that were created using the Rail fence Cipher provided a key and an offsetRail Fence Mật mã EncodeEncodes Strings using the Rail fence Cipher provided a key and an offsetSIGABAEncipher/decipher with the WW2 SIGABA machine. SIGABA, otherwise known as ECM Mark II, was used by the United States for message encryption during WW2 up to the 1950s. It was developed in the 1930s by the US Army and Navy, and has up to thiTypexEncipher/decipher with the WW2 Typex machine. Typex was originally built by the British Royal Air Force prior to WW2, and is based on the Enigma machine with some improvements made, including using five rotors with more stepping points and WhirlpoolWhirlpool is a cryptographic hash function designed by Vincent Rijmen (co-creator of AES) and Paulo S. L. M. Barreto, who first described it in 2000. Several variants exist: Whirlpool-0 is the original version released in 2000. Whirlpool-T Mã hóa XXTEACorrected Block TEA (often referred to as XXTEA) is a block cipher designed to correct weaknesses in the original Block TEA. XXTEA operates on variable-length blocks that are some arbitrary multiple of 32 bits in size (minimum 64 bits). The
JSON Tools
Bộ làm đẹp JSON Bộ định dạng &Pretty-print JSON with configurable indentation.Bộ thu nhỏ JSONStrip whitespace to compress JSON payloads.Bộ xác thực JSONCheck JSON syntax and pinpoint the exact error position.Bộ thoát ký tự JSON cơ bảnEscape a string for embedding inside a JSON document.Bộ bỏ thoát JSON cơ bảnUnescape a JSON-encoded string value.Bộ chuyển đổi JSON to CSVFlatten JSON arrays of objects into CSV.Bộ chuyển đổi JSON to XMLTransform JSON structures into XML documents.Bộ chuyển đổi JSON to YAMLConvert JSON into clean, readable YAML.Truy vấn JSON Đường dẫnExtract values from JSON with dot/bracket path expressions.JSON văn bản mẫuCompare two JSON documents deep-equal and list every added, removed and changed path.JSON FlattenCollapse a nested JSON object into dotted keys with array indices.JSON UnflattenExpand dotted-key JSON back into nested objects and arrays.Bộ tạo JSON SchemaInfer a JSON Schema 2020-12 document from a sample, detecting dates, emails, URIs and UUIDs.Extract Audio MetadataExtract common audio metadata across MP3 (ID3v2/ID3v1/GEOB), WAV/BWF/BW64 (INFO/bext/iXML/axml), FLAC (Vorbis Comment/Picture), OGG (Vorbis/OpusTags), AAC (ADTS), AC3 (Dolby Digital), WMA (ASF), plus best-effort MP4/M4A and AIFF scanning. OParse TLVConverts a Type-Length-Value (TLV) encoded string into a JSON object. Can optionally include a Key / Type entry. Tags: Key-Length-Value, KLV, Length-Value, LV
XML Tools
Bộ định dạng XMLBeautify and indent messy XML.Bộ thu nhỏ XMLRemove XML whitespace and comments.Bộ xác thực XMLCheck XML well-formedness with precise error messages.Bộ chuyển đổi XML to JSONConvert XML documents into JSON structures.XML BeautifyIndents and prettifies eXtensible Markup Language (XML) code.
HTML Tools
Bộ thu nhỏ HTMLShrink HTML by removing comments and redundant whitespace.Xem trước HTML LiveRender HTML instantly in a sandboxed preview frame.Bộ loại bỏ HTML TagRemove all markup and keep clean text.Render MarkdownRenders input Markdown as HTML. HTML rendering is disabled to avoid XSS.Strip HTML tagsRemoves all HTML tags from the input.
CSS Tools
Bộ định dạng CSSIndent and tidy CSS stylesheets.Bộ thu nhỏ CSSCompress CSS for production.CSS Unit Bộ chuyển đổi (px, rem, em, %)Convert between px, rem, em, pt and % with a configurable root size.Bộ tạo CSS bóngBuild linear and radial gradients visually and copy the CSS.Bộ tạo Box đơn vịDesign box shadows with live preview and copy-ready CSS.CSS BeautifyIndents and prettifies Cascading Style Sheets (CSS) code.
JavaScript Tools
Developer Tools
Bộ phân tích cú pháp chuyển sắc khoảng cáchExplain cron syntax and compute the next 10 run times.Tra cứu HTTP người dùng CodeSearch all HTTP status codes with meanings and usage notes.Bộ phân tích cú pháp User-AgentBreak a User-Agent string into browser, engine and OS.ASCII ký tự UnicodeInteractive reference of all 128 ASCII codes.Tra cứu nhị phân ký tựInspect code points, blocks and UTF encodings of any character.Bộ tạo .gitignoreAssemble a .gitignore from curated stack templates.Bộ phân tích cú pháp SemverBreak a semantic version into major, minor, patch, prerelease and build metadata.Semver CompareCompare two semantic versions by precedence and tell you whether the change is breaking.Bộ kiểm tra Semver RangeTest whether a version satisfies a ^, ~, >=, < or x-range expression.Bộ giải mã Snowflake IDDecode a Twitter or Discord snowflake into its timestamp, worker and sequence bits.Bộ giải mã MongoDB ObjectIdExtract the creation timestamp, random bytes and counter from a 24-character ObjectId.Tra cứu MIME TypeLook up the MIME type for a file extension or the extensions for a MIME type, with server config snippets.Semver BumpBump major, minor, patch or any prerelease component with the reset rules applied.Semver xáo trộnSort a list of versions by semver precedence, so 1.10.0 correctly follows 1.9.0.Bộ tạo Snowflake IDGenerate time-ordered 64-bit snowflake IDs with a configurable worker id and epoch.Bộ tạo MongoDB ObjectIdGenerate valid 24-character ObjectIds with the current timestamp, random bytes and counter.Bộ định dạng SQLBeautify SQL queries: keywords on new lines with indent, SELECT lists one column per line, subqueries nested, string literals and comments untouched.Bộ chuyển đổi cURL to CodePaste a curl command and get a ready-to-run JavaScript fetch or Python requests snippet with method, headers and body preserved.Generic Code BeautifyAttempts to pretty print C-style languages such as C, C++, C#, Java, PHP, JavaScript etc. This will not do a perfect job, and the resulting code may not work any more. This operation is designed purely to make obfuscated or minified code moSQL MinifyCompresses Structured Query Language (SQL) code.SSDEEPSSDEEP is a program for computing context triggered piecewise hashes (CTPH). Also called fuzzy hashes, CTPH can match inputs that have homologies. Such inputs have sequences of identical bytes in the same order, although bytes in between th
Network Tools
Tra cứu DNSQuery A, AAAA, MX, TXT, NS, CNAME and SOA records over DNS-over-HTTPS.Tra cứu tiêu đề RDAP WHOISFetch registrar, status and expiry data via RDAP.Bộ kiểm định HTTP Request trạng tháiSee exactly which headers your client sends.Tra cứu cổng sốFind the service behind a port number, or the port behind a service name, with the IANA class.Bộ trích xuất IP AddressPull every IPv4 address out of a log file, packet capture summary or config dump, deduplicated.Bộ trích xuất URLFind and list every http/https URL in unstructured text, one per line, deduplicated.Parse Ethernet frameParses an Ethernet frame and either shows the deduced values (Source and destination MAC, VLANs) or returns the packet data. Good for use in conjunction with the Parse IPv4, and Parse TCP/UDP recipes.Parse UDPParses a UDP header and payload (if present).Strip HTTP headersRemoves HTTP headers from a request or response by looking for the first instance of a double newline.Strip IPv4 headerStrips the IPv4 header from an IPv4 packet, outputting the payload.Strip TCP headerStrips the TCP header from a TCP segment, outputting the payload.Strip UDP headerStrips the UDP header from a UDP datagram, outputting the payload.TCP IP truy vấnCalculates the checksum for a TCP (Transport Control Protocol) or IP (Internet Protocol) header from an input of raw bytes.
IP Tools
Máy tính IPv4 tên miền CIDRNetwork address, broadcast, wildcard, mask and host range from any CIDR.Bộ mở rộng IPv6 AddressExpand abbreviated IPv6 to the full 8-group form.Bộ nén IPv6 AddressCompress IPv6 to its shortest RFC 5952 form.Bộ chuyển đổi IP to phần trămConvert IPv4 addresses to 32-bit integers and back.Bộ chuyển đổi phần trăm to IPTurn a packed integer back into dotted-quad IPv4.Bộ xác thực MAC AddressValidate MAC formats and inspect unicast/multicast and admin bits.Defang IP AddressesTakes a IPv4 or IPv6 address and 'Defangs' it, meaning the IP becomes invalid, removing the risk of accidentally utilising it as an IP address.Format MAC addressesDisplays given MAC addresses in multiple different formats. Expects addresses in a list separated by newlines, spaces or commas. WARNING: There are no validity checks.IPv6 Transition AddressesConverts IPv4 addresses to their IPv6 Transition addresses. IPv6 Transition addresses can also be converted back into their original IPv4 address. MAC addresses can also be converted into the EUI-64 format, this can them be appended to your
URL Tools
Bộ phân tích cú pháp URLSplit any URL into protocol, host, port, path, query and hash.Bộ phân tích cú pháp Truy vấn cơ bảnDecode query strings into a readable parameter table.Bộ dựng UTM LinkAppend UTM campaign parameters to any URL.Bộ phân giải Relative URLResolve relative links against a base URL.Parse URIPretty prints complicated Uniform Resource Identifier (URI) strings for ease of reading. Particularly useful for Uniform Resource Locators (URLs) with a lot of arguments.
Timestamp Tools
Bộ chuyển đổi Unix mốc thời gianConvert Unix time to human dates and back, in any timezone.Current Unix thời gianLive clock showing Unix time in seconds and milliseconds.Bộ chuyển đổi mốc thời gian to ngàyTurn a timestamp (s/ms/µs) into a formatted date instantly.Bộ chuyển đổi ngày to mốc thời gianConvert a calendar date & time into Unix epoch seconds.Bộ chuyển đổi MillisecondsConvert milliseconds to seconds, minutes, hours and days.Máy tính thời gian DifferenceDistance between two timestamps or dates in every unit.From UNIX mốc thời gianConverts a UNIX timestamp to a datetime string. e.g. 978346800 becomes Mon 1 January 2001 11:00:00 UTC A UNIX timestamp is a 32-bit value representing the number of seconds since January 1, 1970 UTC (the UNIX epoch).To UNIX mốc thời gianParses a datetime string in UTC and returns the corresponding UNIX timestamp. e.g. Mon 1 January 2001 11:00:00 becomes 978346800 A UNIX timestamp is a 32-bit value representing the number of seconds since January 1, 1970 UTC (the UNIX epoch
Date & Time Tools
Bộ chuyển đổi ngày FormatRender any date in ISO, RFC, locale and custom formats.Days Between ngàyCount days (and weeks/months) between two calendar dates.Máy tính ngày Add SubtractAdd or subtract days, weeks, months from a date.Bộ chuyển đổi mạng conCompare times across world timezones instantly.Bộ kiểm tra tuần YearCheck whether a year is a leap year and why.Máy tính năm nhuậnExact age in years, months, days, hours and total days.Máy tính ISO múi giờ sốFind the ISO-8601 week and weekday of any date.Get thời gianGenerates a timestamp showing the amount of time since the UNIX epoch (1970-01-01 00:00:00 UTC). Uses the W3C High Resolution Time API.Parse DateTimeParses a DateTime string in your specified format and displays it in whichever timezone you choose with the following information: Date Time Period (AM/PM) Timezone UTC offset Daylight Saving Time Leap year Days in this month Day of year WeTarPacks the input into a tarball. No support for multiple files at this time.
Number Tools
Bộ chuyển đổi số BaseConvert integers between bases 2–36.Bộ chuyển đổi thập phân phần trăm thập lục phân LiveEdit hex, dec, oct and bin simultaneously — all stay in sync.Bộ chuyển đổi Roman NumeralConvert between Roman numerals and Arabic numbers.Bộ chuyển đổi số to WordsSpell out numbers in English words (cheques, captions).Máy tính ngẫu nhiênPercent of, increase/decrease and ratio problems.Bộ tạo tuổi sốCryptographically random integers in any range.Bộ định dạng sốThousands separators and fixed decimals for any locale.Máy tính giai thừaExact big-integer factorials.Máy tính GCD & LCMGreatest common divisor and least common multiple of a list.Bộ kiểm tra số nguyên tố sốTest primality and show the smallest factor.Convert data unitsConverts a unit of data to another format.Convert distanceConverts a unit of distance to another format.nhị phân văn bản FormatAdds Unicode combining characters to change formatting of plaintext.
Binary Tools
Bộ chuyển đổi văn bản to thập lục phânConvert text into 0/1 byte notation.Bộ chuyển đổi thập lục phân to văn bảnConvert 0/1 bit groups back into readable text.Máy tính BitwiseAND, OR, XOR, NOT and shifts on 32/64-bit integers.Bộ chuyển đổi EndiannessSwap byte order of hex words (big ↔ little endian).Bộ chuyển đổi Byte UnitKB/KiB, MB/MiB, GB/GiB… decimal vs binary units.
Hex Tools
Regex Tools
Image Tools
hình ảnh ResizerResize images locally without uploading them.Bộ chuyển đổi hình ảnh FormatConvert PNG ↔ JPEG ↔ WebP in the browser.Bộ nén hình ảnhRe-encode JPEG/WebP with a quality slider and size preview.Bộ chuyển đổi hình ảnh to Base64Embed images as Base64 data URIs.Bộ chuyển đổi Base64 to hình ảnhPreview and download an image from Base64 data.Bộ chọn hình ảnh màuPick pixel colors from any uploaded image.Bộ chuyển đổi SVG to PNGConvert SVG to PNG with a transparent or custom background, exact pixel width and up to 8× quality — every file is rasterised by your own browser in seconds, never uploaded, no sign-up and no watermark.Bộ chuyển đổi SVG to JPGConvert SVG to JPG right in the browser — the background is flattened to white (or any colour you pick), the size follows your request, and the vector file is only ever opened inside your own tab.Scan for Embedded TệpScans the data for potential embedded files by looking for magic bytes at all offsets. This operation is prone to false positives. WARNING: Files over about 100KB in size will take a VERY long time to process.
File Tools
Bộ chuyển đổi tệp to Base64Encode any local file to Base64 — nothing is uploaded.Base64 to tệp DownloaderDecode Base64 back into the original file.Bộ kiểm tra tệp bămMD5/SHA-1/SHA-256/SHA-512 of any file, computed locally.tệp Metadata ViewerInspect name, MIME type, size and modification time.Trình đóng gói Tệp to ZIPBundle multiple files into a ZIP archive locally.Bộ nhận dạng Magic bitIdentify a file type from its signature bytes rather than its extension — the safe way to validate uploads.Bộ trích xuất ZIPPreview and unpack any ZIP file right in your browser — list every entry, view text and images inline, download files one by one, and the archive is never uploaded.Bộ chuyển đổi văn bản to DOCXPaste plain text and download a real Word .docx — paragraphs, UTF-8 and escapes are assembled into minimal OOXML in your browser and verified by reading the file back before download. Nothing is uploaded.Bộ chuyển đổi TXT to DOCXDrop or paste a .txt file and get a .docx Word, WPS or Pages can open — plain-text paragraphs preserved exactly, emoji and & < > included, built and read back locally in this tab.Bộ chuyển đổi Markdown to DOCXTurn a Markdown note into a .docx — headings and bullets cross over as literal text on purpose: this builds an honest minimal Word document locally, not a styled clone, and your note is never uploaded.Bộ chuyển đổi DOCX to văn bảnDrop a .docx Word file and get its plain text out — copied to the clipboard or downloaded as .txt — extracted and verified entirely in your browser, never uploaded. Macro documents, password-protected files and legacy .doc are refused, not converted.Detect tệp TypeAttempts to guess the MIME (Multipurpose Internet Mail Extensions) type of the data based on 'magic bytes'. Currently supports the following file types:tệp TreeCreates a file tree from a list of file paths (similar to the tree command in Linux)
Compression Tools
Bộ nén GzipGzip text and download the .gz or inspect Base64.Bộ giải nén GzipInflate gzip payloads from files or Base64.Bộ nén DeflateRaw DEFLATE compression in the browser.Bộ giải nén DeflateInflate raw DEFLATE data.Bộ nén BrotliCompress text with Brotli (RFC 7932) directly in your browser — the same codec Google ships, compiled to WebAssembly, quality 0–11, Base64 or Hex output with exact size statistics.Bộ giải nén BrotliPaste Base64 or Hex brotli data and get the original text back — real RFC 7932 decompression in WebAssembly, binary payloads detected and re-encoded, nothing uploaded.Bzip2 CompressBzip2 is a compression library developed by Julian Seward (of GHC fame) that uses the Burrows-Wheeler algorithm. It only supports compressing single files and its compression is slow, however is more effective than Deflate (.gz & .zip).
Data Conversion Tools
Bộ chuyển đổi CSV to JSONTurn CSV (or any delimited file) into a JSON array.Bộ chuyển đổi YAML to JSONParse YAML configuration into JSON.Bộ chuyển đổi HTML to MarkdownConvert HTML fragments into Markdown.Bộ chuyển đổi JSON to TOMLConvert JSON config into TOML format.Bộ chuyển đổi Markdown to HTMLRender Markdown to clean HTML.Bộ chuyển đổi DelimiterSwitch CSV between comma, tab, semicolon and pipe.JSON to JSON dòngTurn a JSON array into newline-delimited NDJSON, one standalone object per line.JSON dòng to JSONMerge newline-delimited JSON records back into one array and report any malformed line by number.JSON to TypeScriptGenerate TypeScript interfaces from a JSON sample, including nested objects and arrays.JSON to Go StructGenerate a Go struct with json tags from a JSON sample.JSON to Python DataclassGenerate a typed Python dataclass from a JSON sample.JSON to SQL CREATE TABLEInfer column types from JSON and emit a CREATE TABLE statement.CSV to Markdown UnicodeConvert CSV into a GitHub-flavoured Markdown table, handling quoted fields and pipes.Markdown Unicode to CSVTurn a Markdown table back into clean CSV with proper quoting.CSV Pretty PrinterAlign CSV columns into a readable fixed-width table for terminals and docs.CSV to HTML UnicodeGenerate an accessible HTML table from CSV with escaped cells.CSV to SQL INSERTProduce INSERT statements from CSV or JSON, with NULLs and quoted literals handled.CSV to CREATE TABLEInfer column types from CSV data and emit a CREATE TABLE for PostgreSQL, MySQL or SQLite.INI to JSONParse INI sections and key/value pairs into a structured JSON object.JSON to INISerialise a JSON object into an INI file with sections for nested objects..env to JSONParse dotenv files — comments, export prefixes, quoting and inline hashes — into JSON.JSON to .envFlatten JSON into UPPER_SNAKE dotenv variables with correct quoting.Java Properties to JSONConvert .properties files into JSON, splitting dotted keys into nested objects.JSON to Java PropertiesFlatten JSON into dotted Java .properties keys.JSON to Java RecordGenerate a Java record with boxed types and snake_case field names from a JSON sample.JSON to Rust StructGenerate a serde-derived Rust struct with rename attributes from a JSON sample.JSON to Kotlin dữ liệu ClassGenerate a Kotlin data class with nullable-aware types from a JSON sample.
Security Tools
Bộ tạo Strong mật khẩuCrypto-random passwords with full policy control.Bộ tạo cụm mật khẩuDiceware-style memorable passphrases.Bộ thử mật khẩu StrengthEstimate entropy and crack-time of a password.Bộ tạo API KeyRandom hex / Base64 secrets of any length.Bộ tạo bảng Auth HeaderBuild and decode Authorization: Basic headers.Bộ giải mã JWTInspect JWT header, payload and signature metadata.Bộ xác minh truy vấnCompare a file hash against the published digest.Bộ quét SecretFind leaked API keys, tokens, private keys, JWTs and connection strings in config files, logs or code.Bộ ẩn danh PIIMask emails, phone numbers, SSNs, card numbers, IPs, IBANs, MACs and JWTs in logs before sharing them.Bộ tạo TOTP CodeGenerate RFC 6238 time-based one-time passwords from a Base32 secret, with the otpauth URI.Bộ xác minh JWT claimDecode a JWT and verify its HS256 signature locally, with exp/nbf/iat claim checks.EXIF RemoverRemove EXIF, GPS location, camera info, IPTC and comments from JPG, PNG and WebP photos in one batch — every cleaned file is re-parsed in your browser to prove zero metadata remains, and your photos are never uploaded.Bộ tạo JWTSign and verify JSON Web Tokens entirely in your browser — HS256, HS384, HS512, RS256 and ES256 run on your own WebCrypto, fresh RSA-2048/EC P-256 pairs export as PKCS#8 and SPKI PEM, exp/iat come back as human dates, and the unsigned "none" algorithm is refused by design. Nothing is uploaded.JWT SignerSeal a payload with RS256 (or HS256/HS384/HS512 and ES256) right in the browser: paste claims and a PKCS#8 private key — or generate an RSA/EC pair on the spot — then verify the result on the same page. "none" is never accepted, and your keys never leave this machine.To Bech32Bech32 is an encoding scheme primarily used for Bitcoin SegWit addresses (BIP-0173). It uses a 32-character alphabet that excludes easily confused characters (1, b, i, o) and includes a checksum for error detection. Bech32m (BIP-0350) is an
UUID Tools
Bộ tạo UUIDRandom RFC 4122 v4 UUIDs, bulk generation included.Bộ tạo UUID v7Time-ordered sortable UUIDs for databases.Bộ tạo ULID26-character lexicographically sortable unique IDs.Bộ tạo GUIDMicrosoft-style bracketed GUIDs.Bộ xác thực UUIDValidate a UUID/GUID and detect its version & variant.Generate all checksumsGenerates all available checksums for the input.Generate UUIDGenerates an RFC 9562 (formerly RFC 4122) compliant Universally Unique Identifier (UUID),
Color Tools
Bộ chọn thập phân màuInteractive picker with HEX, RGB and HSL output.Bộ chuyển đổi màu CodeConvert between HEX, RGB, HSL and named colors.màu tên Bộ kiểm tra (WCAG)Verify text contrast ratios against WCAG AA/AAA.Bộ tạo màu độ tương phảnShades, tints and complementary schemes from one color.Bộ tạo tuổi màuBatch random colors with copyable codes.Bảng tham chiếu CSS Đặt tên MàuAll 148 CSS color names with codes and previews.Bộ trộn màuBlend two colours in sRGB, HSL or perceptual CIE Lab and generate a ramp with contrast ratios.Bộ chuyển đổi CMYKConvert between HEX/RGB/HSL and CMYK for print, in both directions.CMYK to RGBConvert print CMYK percentages back to screen HEX, RGB and HSL.Parse colour codeConverts a colour code in a standard format to other standard formats and displays the colour itself. Example inputs #d9edf7 rgba(217,237,247,1) hsla(200,65%,91%,1) cmyk(0.12, 0.04, 0.00, 0.03)
Web Tools
Bộ tạo HTML chuyển hướng TagBuild title, description, OG and Twitter card tags.Bộ tạo robots.txtCompose a correct robots.txt with sitemaps and rules.Bộ tạo .htaccess Redirect301/302 redirect and HTTPS-force snippets.Bộ tạo JSON-LD Structured dữ liệuCreate schema.org JSON-LD for articles, products and FAQs.bí mật Address ObfuscatorEncode emails to defeat scrapers.Bộ tạo emailRender text or color into a real .ico file locally.Bộ tạo Content-Security-PolicyBuild a CSP header for nginx, Apache or HTML, with warnings about unsafe-inline and unsafe-eval.Bộ tạo CORS HeaderGenerate correct CORS headers and preflight handling for nginx, Express, Apache, PHP or a Cloudflare Worker.CORS trạng thái for ExpressGenerate correct Express CORS middleware with an explicit origin allow-list and preflight handling.CORS trạng thái for ApacheGenerate Apache mod_headers CORS configuration with OPTIONS preflight rewriting.
Unit Converters
Bộ chuyển đổi độ dàiConvert metres, kilometres, centimetres, inches, feet, yards, miles and nautical miles.Bộ chuyển đổi cân nặngConvert kilograms, grams, tonnes, pounds, ounces, stones and carats.Bộ chuyển đổi nhiệt độConvert Celsius, Fahrenheit, Kelvin and Rankine with the formulas shown.Bộ chuyển đổi thể tíchConvert litres, millilitres, US and imperial gallons, cups, pints, quarts and fluid ounces.Bộ chuyển đổi tốc độConvert km/h, mph, metres per second, knots, feet per second and Mach number.Bộ chuyển đổi diện tíchConvert square metres, hectares, acres, square feet, square inches and square miles.Bộ chuyển đổi áp suấtConvert pascbar, psi, atm, torr, mmHg, kgf/cm² and inches of mercury.Bộ chuyển đổi năng lượngConvert joules, kilowatt-hours, calories, kilocalories, BTU, electronvolts and tonnes of oil equivalent.Bộ chuyển đổi công suấtConvert watts, kilowatts, mechanical and metric horsepower, BTU/h and kcal/h.Bộ chuyển đổi gócConvert degrees, radians, gradians, arcminutes, arcseconds and turns.Bộ chuyển đổi thời gian thời lượngConvert nanoseconds to centuries: seconds, minutes, hours, days, weeks, months and years.Bộ chuyển đổi dữ liệu lưu trữConvert bits, bytes and SI versus IEC multiples — kB, MB, GB, KiB, MiB, GiB, TiB.Bộ chuyển đổi Typography UnitConvert CSS px, pt, pc, mm, cm, in, Q and didot/cicero at the standard 96 dpi reference.Bộ chuyển đổi cuối dòngConvert hertz, kilohertz, megahertz, gigahertz, RPM and radians per second.Bộ chuyển đổi dữ liệu RateConvert bandwidth between bit/s, kbit/s, Mbit/s, Gbit/s and byte-per-second units including IEC multiples.Bộ chuyển đổi ForceConvert newtons, kilonewtons, dynes, kilogram-force, pound-force, ounce-force, poundals and kips.Bộ chuyển đổi TorqueConvert newton-metres, kgf·m, kgf·cm, lbf·ft, lbf·in, ozf·in and dyne-centimetres.Bộ chuyển đổi DensityConvert kg/m³, g/cm³, g/mL, lb/ft³, lb/in³ and tonnes per cubic metre.Bộ chuyển đổi Radiation DoseConvert gray, rad, sievert and rem including milli and micro prefixes.Bộ chuyển đổi ViscosityConvert dynamic viscosity between Pa·s, mPa·s, centipoise, poise and lbf·s/ft².Bộ chuyển đổi LuminanceConvert cd/m², nits, lamberts, foot-lamberts, stilbs and cd/cm².Bộ chuyển đổi IlluminanceConvert lux, kilolux, phot, foot-candles and lumens per square foot.Convert areaConverts a unit of area to another format.Convert massConverts a unit of mass to another format.Convert speedConverts a unit of speed to another format.
Math & Statistics
Máy tính thống kêMean, median, mode, range, variance, standard deviation, standard error, quartiles and IQR from a list of numbers.Máy tính bách phân vịCompute any percentile of a data set with linear interpolation, plus all deciles.Máy tính tương quanPearson and Spearman correlation, r², and the least-squares regression line for paired data.Máy tính tổ hợpC(n,r) with exact BigInt arithmetic and a list of the actual combinations for small inputs.Máy tính hoán vịP(n,r) ordered arrangements computed exactly with BigInt — no floating point rounding.Máy tính số nguyên tố FactorizationBreak any integer into prime factors and list every divisor with the divisor count.Bộ kiểm tra số nguyên tố sốTest whether a number is prime and, if not, show its smallest divisors and divisor count.Primes Up To NList every prime number up to a limit, with the count.Máy tính Math khoảng cáchEvaluate arithmetic expressions with correct precedence, powers, factorials, functions and constants.Máy tính phân sốSimplify fractions, convert decimals to exact fractions and add, subtract, multiply or divide them.phần trăm to phân sốConvert any decimal to its exact simplest fraction using continued-fraction search with a tolerance.Add and Subtract FractionsAdd, subtract, multiply or divide fractions with the common denominator and GCD reduction shown.Drop bytesCuts a slice of the specified number of bytes out of the data. Negative values are allowed.MeanComputes the mean (average) of a number list. If an item in the string is not a number it is excluded from the list. e.g. 0x0a 8 .5 .5 becomes 4.75Rotate leftRotates each byte to the left by the number of bits specified, optionally carrying the excess bits over to the next byte. Currently only supports 8-bit values.Rotate rightRotates each byte to the right by the number of bits specified, optionally carrying the excess bits over to the next byte. Currently only supports 8-bit values.SleepSleep causes the recipe to wait for a specified number of milliseconds before continuing execution.Standard DeviationComputes the standard deviation of a number list. If an item in the string is not a number it is excluded from the list. e.g. 0x0a 8 .5 becomes 4.089281382128433Take bytesTakes a slice of the specified number of bytes from the data. Negative values are allowed.
Validators & Checksums
Bộ xác thực Card sốValidate a card or IMEI with the Luhn algorithm, detect the brand and derive the missing check digit.Bộ xác thực ISBNCheck ISBN-10 and ISBN-13 check digits and compute the correct one for a truncated ISBN.Bộ xác thực Barcode Check DigitValidate EAN-8, EAN-13, UPC-A and ITF-14 barcodes and see the weighted sum step by step.Bộ xác thực IBANValidate an IBAN with MOD-97, check the national length and show the rearranged calculation.Bộ xác thực SWIFT BICCheck an ISO 9362 BIC and split it into institution, country, location and branch codes.Bộ kiểm tra VINValidate a 17-character vehicle VIN check digit and decode region, year and plant positions.Bộ xác thực Mod-11 Check DigitValidate ISSN, ISMN, ORCID and other mod-11 identifiers, with the weighted sum shown.Bộ xác thực LEIValidate an ISO 17442 Legal Entity Identifier with the ISO 7064 MOD 97-10 scheme.Bộ xác thực Verhoeff CheckApply the Verhoeff dihedral-group checksum that catches all single-digit and all transposition errors.Bộ xác thực Damm CheckRun the Damm quasigroup checksum, which detects every single-digit error and adjacent transposition.Bộ chuyển đổi Latitude LongitudeConvert between decimal degrees and degrees-minutes-seconds, with hemisphere and UTM zone hints.Caret M-decodeDecodes caret or M-encoded strings, i.e. ^M turns into a newline, M-^] turns into 0x9d. Sources such as `cat -v`. Please be aware that when using `cat -v` ^_ (caret-underscore) will not be encoded, but represents a valid encoding (namely thFletcher-16 truy vấnThe Fletcher checksum is an algorithm for computing a position-dependent checksum devised by John Gould Fletcher at Lawrence Livermore Labs in the late 1970s. The objective of the Fletcher checksum was to provide error-detection properties Fletcher-32 truy vấnThe Fletcher checksum is an algorithm for computing a position-dependent checksum devised by John Gould Fletcher at Lawrence Livermore Labs in the late 1970s. The objective of the Fletcher checksum was to provide error-detection properties Fletcher-64 truy vấnThe Fletcher checksum is an algorithm for computing a position-dependent checksum devised by John Gould Fletcher at Lawrence Livermore Labs in the late 1970s. The objective of the Fletcher checksum was to provide error-detection properties
QR Code Tools
Bộ tạo mã QRCreate QR codes for text, URLs, Wi-Fi, vCard, email, phone, SMS, geo, calendar, WhatsApp, Telegram, Bitcoin, Ethereum, UPI and JSON, with error correction, quiet zone, colours and PNG/SVG export.Bộ tạo URL mã QRTurn any link into a scannable QR code, adding https:// when the scheme is missing and warning about unsafe schemes.Bộ tạo Wi-Fi mã QRBuild a standards-compliant WIFI: payload with SSID, password, WPA/WEP/open encryption and hidden-network flag so phones join the network on scan.Bộ tạo vCard mã QRGenerate a vCard 3.0 contact QR code with name, organisation, title, phone, email, website, address and note.Bộ tạo MECARD mã QRBuild a MECARD contact payload — the compact alternative to vCard that fits in a smaller, lower-version QR symbol.Bộ tạo bí mật mã QRCreate a mailto: QR code with prefilled recipient, subject and body.Bộ tạo Phone số mã QRGenerate a tel: URI QR code that opens the dialler with the number already filled in.Bộ tạo SMS mã QRBuild an sms: URI QR code with a prefilled message body, encoded for both iOS and Android.Bộ tạo Geo Location mã QRCreate a geo: URI QR code from latitude and longitude, validating the coordinate ranges before encoding.Bộ tạo Calendar Event mã QRGenerate an iCalendar VEVENT QR code with start, end, title, location and description that phones add straight to the calendar.Bộ tạo WhatsApp mã QRBuild a wa.me link QR code with an optional prefilled message, normalising the phone number to digits with country code.Bộ tạo Telegram mã QRCreate a t.me link QR code that opens a Telegram chat or channel.Bộ tạo Bitcoin Payment mã QRBuild a BIP-21 bitcoin: URI QR code with address, amount, label and message, and check the address shape.Bộ tạo Ethereum Payment mã QRGenerate an EIP-681 ethereum: URI QR code with address, value and gas limit, validating the 0x + 40 hex format.Bộ tạo UPI Payment mã QRBuild a upi://pay QR code with payee VPA, name, amount, note and currency, validating the VPA and amount formats.Bộ tạo JSON mã QRValidate and minify JSON before encoding it, so the payload fits in the smallest possible QR version.Bộ giải mã mã QRUpload a PNG, JPG, WebP or GIF and decode the QR code locally with jsQR, then identify the payload type and parse its fields.QR Payload Type DetectorIdentify what a decoded QR payload actually is — URL, Wi-Fi, vCard, MECARD, geo, calendar, email, phone, SMS, Bitcoin, Ethereum, UPI, WhatsApp, Telegram, JSON, XML or plain text — and split it into fields.Bộ xác thực mã QRCheck a payload before you print it: capacity at the chosen error correction level, URL/email/Wi-Fi/vCard/geo/Bitcoin/Ethereum/UPI/JSON format, unsafe schemes and scannability risks.Bộ phân tích cú pháp QR PayloadSplit a raw QR payload into its component fields — Wi-Fi SSID and encryption, vCard name and phone, geo coordinates, URI query parameters.Bộ định dạng QR PayloadBuild a correct standard payload string from JSON fields, applying the escaping rules each format requires.mã QR Scan TestRender your QR settings and then decode the result locally, comparing it to the original payload, plus quiet zone, contrast, density and capacity checks with a Good / Warning / Risk verdict.Generate mã QRGenerates a Quick Response (QR) code from the input text. A QR code is a type of matrix barcode (or two-dimensional barcode) first designed in 1994 for the automotive industry in Japan. A barcode is a machine-readable optical label that con
Spreadsheet Tools
Bộ chuyển đổi Excel to JSONConvert an .xlsx, .xlsm or .xls workbook to JSON in your browser — a lossless table dump of the first sheet (header row included), a live preview of every sheet, correct UTF-8, and the file is never uploaded.Bộ chuyển đổi Excel to CSVConvert an .xlsx, .xlsm or .xls workbook to RFC 4180 CSV with correct UTF-8 — commas and quotes are escaped by doubling, every sheet is previewed, no upload and no sign-up.Bộ chuyển đổi CSV to XLSXPaste CSV, TSV, semicolon or pipe text and download a real .xlsx — quotes, CRLF and UTF-8 handled, delimiters auto-sniffed (TAB ; , |) or set by hand, decimal commas preserved, nothing uploaded.Bộ chuyển đổi JSON to XLSXPaste a JSON array of objects or rows and get a real .xlsx — header from the key union, numbers stay numeric, mixed shapes are refused not guessed, all in your browser.
PDF Tools
Công cụ PDF tìmMerge two or more PDF files into one document — pages keep their original size and quality, the order follows your selection, and everything runs in your browser: no upload, no sign-up, nothing ever leaves your machine.Bộ chuyển đổi hình ảnh to PDFConvert JPG and PNG images into a single PDF in your browser — every photo becomes a page in the order you picked them, original resolution is kept, and nothing is uploaded: no account, no queue, no size games.Bộ quét Photo to PDFTurn phone photos into a clean scanned-style A4 PDF — up to 30 images are centered and fitted onto uniform pages automatically, and the whole scan runs locally like a scanner app without ever uploading a photo.PDF RotatorRotate PDF pages in your browser — turn every page, or just the ones you name (like 1,3-5), 90° either way or upside down, with no re-encoding, no upload and no sign-up. Password-protected PDFs are not supported.đảo ngược PDF PagesFlip a PDF end to end — the last page becomes page 1 and vice versa, no page content is re-encoded, and the whole reorder runs locally in your browser with no upload and no sign-up.Bộ chuyển đổi PDF to văn bảnConvert a PDF to text in your browser — every page is parsed locally with pdf.js, lines come out in reading order, and you get word and character counts plus a .txt download. No upload, no sign-up; scans (no OCR) and password-protected files are declined, and layout is not preserved.Extract văn bản from PDFExtract the text out of a PDF in one tab: click or drop your file and pdf.js pulls every selectable line locally — the document itself never leaves your machine. Per-page failures degrade to a placeholder instead of killing the run.Bộ trích xuất PDF văn bảnA local PDF text extractor: open the file with the pdf.js engine right in this page, copy the plain text or download it as .txt, with page/word/character counts shown up front. Image-only scans and encrypted files are declined up front — this tool is honest about what it reads.Bộ chuyển đổi PDF to từConvert a PDF to a Word (.docx) file in your browser: pdf.js reads the selectable text, then a minimal reflowed Word document is assembled paragraph by paragraph — counts up front, copy and download included, no upload and no sign-up. Fonts, images and page layout from the original are not carried across (this is an honest text rebuild), scans get no OCR, and password-protected PDFs are declined.Bộ chuyển đổi PDF to DOCXTurn a PDF into a .docx you can keep editing: the text is extracted locally with the same pdf.js engine as our PDF text tools and rebuilt as clean Word paragraphs with the same builder as our Text to Word page. Reflowed plain text on purpose — not a pixel-faithful conversion; dense scans (no OCR), encrypted files and documents past the size gates are declined honestly, and nothing is ever uploaded.
Barcode Tools
Bộ tạo BarcodeCreate CODE 128, EAN-13, UPC-A, CODE 39, ITF, Codabar and MSI barcodes from any text or number, with size, colours, quiet zone and crisp SVG or PNG export.Bộ tạo EAN-13 BarcodeGenerate a retail EAN-13 barcode from 12 digits — the 13th check digit is computed for you — and export it as SVG or PNG.Bộ tạo UPC-A BarcodeGenerate a US retail UPC-A barcode from 11 digits with the check digit added automatically, ready for print as SVG or PNG.Bộ tạo Code 128 BarcodeEncode full ASCII text, serial numbers and tracking codes in the compact, high-density Code 128 symbology with automatic subset switching.Bộ tạo Code 39 BarcodeCreate industrial Code 39 barcodes from letters, digits and - . $ / + % — the wide, rugged symbology used on asset and inventory labels.