全部工具
190 working tools — no accounts, no uploads, instant results.
Text Tools
Case ConverterSwitch text between uppercase, lowercase, title case, sentence case and more.camelCase ConverterConvert any text or identifier into camelCase.snake_case ConverterConvert text into snake_case identifiers.kebab-case ConverterConvert text into kebab-case for URLs, CSS classes and CLIs.PascalCase ConverterConvert text into PascalCase for class and type names.CONSTANT_CASE ConverterConvert text into CONSTANT_CASE for macros and enum members.Reverse TextReverse characters, words or lines of any text.Word CounterCount words, characters, sentences and paragraphs live.Character CounterCount characters with and without spaces, including byte length.Line CounterCount lines, empty lines and longest line of pasted text.Remove Duplicate LinesDelete repeated lines while keeping order.Sort LinesSort lines alphabetically, numerically, by length, ascending or descending.Shuffle LinesRandomize the order of lines using a cryptographic RNG.Trim WhitespaceRemove leading/trailing spaces and tabs from every line.Add Prefix & Suffix to LinesWrap every line with a custom prefix and suffix.Line NumberingAdd or remove line numbers on any text block.Merge LinesJoin all lines with a custom separator.Find & Replace in TextSearch and replace text with plain or regular-expression matching.Palindrome CheckerCheck if text or numbers read the same backwards.Text Diff CheckerCompare two texts line by line and highlight additions and deletions.Lorem Ipsum GeneratorGenerate placeholder paragraphs, sentences or words.Zero Pad NumbersPad numbers with leading zeros to a fixed width.String RepeaterRepeat any string or character a given number of times.Whitespace CleanerCollapse spaces, strip blank lines and normalize line endings.Slug GeneratorTurn titles into clean, SEO-friendly URL slugs.
Encoding Tools
Base64 EncoderEncode text, JSON, URLs or files to Base64, standard or URL-safe.Base32 EncoderEncode binary-safe text into RFC 4648 Base32.Base58 EncoderEncode numbers and text with Bitcoin-style Base58 alphabet.Hex Encoder (Text to Hex)Convert text into hexadecimal byte representation.Morse Code EncoderTranslate text into Morse code dots and dashes.ROT13 Encoder / DecoderApply the classic ROT13 letter rotation.ROT47 EncoderScramble printable ASCII with the ROT47 cipher.Caesar CipherEncrypt or decrypt with a classic shift cipher.Atbash CipherApply the Hebrew-alphabet mirror cipher Atbash.NATO Phonetic Alphabet ConverterSpell text with Alpha, Bravo, Charlie…Unicode Escape ConverterConvert characters to \uXXXX escapes and back.HTML Entity EncoderEscape <, >, &, quotes and non-ASCII into HTML entities.CSS Escape ConverterEscape special characters for CSS identifiers and strings.JavaScript String EscaperEscape a string so it is safe inside JavaScript literals.URL EncoderPercent-encode URLs or single query components.Data URI ConverterTurn files or text into data: URIs for inline embedding.
Decoding Tools
Base64 DecoderDecode Base64 (standard or URL-safe) back to text or bytes.Base32 DecoderDecode RFC 4648 Base32 back to text.Base58 DecoderDecode Bitcoin-style Base58 strings.Hex Decoder (Hex to Text)Convert hexadecimal bytes back into text.Morse Code DecoderTranslate dots and dashes back into readable text.HTML Entity DecoderConvert &, ' and named entities back to characters.JavaScript String UnescaperResolve escape sequences inside JavaScript string literals.URL DecoderPercent-decode URLs and query values.Unicode Unescape ConverterTurn \uXXXX and \xNN sequences into real characters.
Hash Tools
MD5 Hash GeneratorCompute the MD5 digest of any string.SHA-1 Hash GeneratorCompute the SHA-1 digest of any string.SHA-256 Hash GeneratorCompute the SHA-256 digest — the standard for modern integrity checks.SHA-384 Hash GeneratorCompute the SHA-384 digest of any string.SHA-512 Hash GeneratorCompute the SHA-512 digest of any string.HMAC GeneratorCreate keyed HMAC signatures with SHA-256/384/512.CRC32 ChecksumCalculate the CRC32 checksum of text or files.Adler-32 ChecksumCompute the fast Adler-32 checksum used by zlib.
Cryptography Tools
AES EncryptPassword-based AES-GCM/CBC encryption using the Web Crypto API.AES DecryptDecrypt AES-GCM/CBC payloads produced by the AES Encrypt tool.RSA Key Pair GeneratorGenerate 2048/4096-bit RSA keys and export them as JWK.XOR CipherEncrypt or decrypt bytes with a repeating XOR key.RC4 EncryptionClassic RC4 stream cipher — for study and legacy interop.Vigenere CipherPolyalphabetic keyword cipher, encrypt and decrypt.
JSON Tools
JSON Formatter & BeautifierPretty-print JSON with configurable indentation.JSON MinifierStrip whitespace to compress JSON payloads.JSON ValidatorCheck JSON syntax and pinpoint the exact error position.JSON String EscaperEscape a string for embedding inside a JSON document.JSON String UnescaperUnescape a JSON-encoded string value.JSON to CSV ConverterFlatten JSON arrays of objects into CSV.JSON to XML ConverterTransform JSON structures into XML documents.JSON to YAML ConverterConvert JSON into clean, readable YAML.JSON Path QueryExtract values from JSON with dot/bracket path expressions.
XML Tools
HTML Tools
CSS Tools
CSS FormatterIndent and tidy CSS stylesheets.CSS MinifierCompress CSS for production.CSS Unit Converter (px, rem, em, %)Convert between px, rem, em, pt and % with a configurable root size.CSS Gradient GeneratorBuild linear and radial gradients visually and copy the CSS.Box Shadow GeneratorDesign box shadows with live preview and copy-ready CSS.
JavaScript Tools
Developer Tools
Cron Expression ParserExplain cron syntax and compute the next 10 run times.HTTP Status Code LookupSearch all HTTP status codes with meanings and usage notes.User-Agent ParserBreak a User-Agent string into browser, engine and OS.ASCII Character TableInteractive reference of all 128 ASCII codes.Unicode Character LookupInspect code points, blocks and UTF encodings of any character..gitignore GeneratorAssemble a .gitignore from curated stack templates.
Network Tools
IP Tools
IPv4 Subnet / CIDR CalculatorNetwork address, broadcast, wildcard, mask and host range from any CIDR.IPv6 Address ExpanderExpand abbreviated IPv6 to the full 8-group form.IPv6 Address CompressorCompress IPv6 to its shortest RFC 5952 form.IP to Decimal ConverterConvert IPv4 addresses to 32-bit integers and back.Decimal to IP ConverterTurn a packed integer back into dotted-quad IPv4.MAC Address ValidatorValidate MAC formats and inspect unicast/multicast and admin bits.
URL Tools
Timestamp Tools
Unix Timestamp ConverterConvert Unix time to human dates and back, in any timezone.Current Unix TimeLive clock showing Unix time in seconds and milliseconds.Timestamp to Date ConverterTurn a timestamp (s/ms/µs) into a formatted date instantly.Date to Timestamp ConverterConvert a calendar date & time into Unix epoch seconds.Milliseconds ConverterConvert milliseconds to seconds, minutes, hours and days.Time Difference CalculatorDistance between two timestamps or dates in every unit.
Date & Time Tools
Date Format ConverterRender any date in ISO, RFC, locale and custom formats.Days Between DatesCount days (and weeks/months) between two calendar dates.Date Add / Subtract CalculatorAdd or subtract days, weeks, months from a date.Timezone ConverterCompare times across world timezones instantly.Leap Year CheckerCheck whether a year is a leap year and why.Age CalculatorExact age in years, months, days, hours and total days.ISO Week Number CalculatorFind the ISO-8601 week and weekday of any date.
Number Tools
Number Base ConverterConvert integers between bases 2–36.Hex / Decimal / Binary Live ConverterEdit hex, dec, oct and bin simultaneously — all stay in sync.Roman Numeral ConverterConvert between Roman numerals and Arabic numbers.Number to Words ConverterSpell out numbers in English words (cheques, captions).Percentage CalculatorPercent of, increase/decrease and ratio problems.Random Number GeneratorCryptographically random integers in any range.Number FormatterThousands separators and fixed decimals for any locale.Factorial CalculatorExact big-integer factorials.GCD & LCM CalculatorGreatest common divisor and least common multiple of a list.Prime Number CheckerTest primality and show the smallest factor.
Binary Tools
Text to Binary ConverterConvert text into 0/1 byte notation.Binary to Text ConverterConvert 0/1 bit groups back into readable text.Bitwise CalculatorAND, OR, XOR, NOT and shifts on 32/64-bit integers.Endianness ConverterSwap byte order of hex words (big ↔ little endian).Byte Unit ConverterKB/KiB, MB/MiB, GB/GiB… decimal vs binary units.
Hex Tools
Regex Tools
Image Tools
Image ResizerResize images locally without uploading them.Image Format ConverterConvert PNG ↔ JPEG ↔ WebP in the browser.Image CompressorRe-encode JPEG/WebP with a quality slider and size preview.Image to Base64 ConverterEmbed images as Base64 data URIs.Base64 to Image ConverterPreview and download an image from Base64 data.Image Color PickerPick pixel colors from any uploaded image.
File Tools
File to Base64 ConverterEncode any local file to Base64 — nothing is uploaded.Base64 to File DownloaderDecode Base64 back into the original file.File Hash CheckerMD5/SHA-1/SHA-256/SHA-512 of any file, computed locally.File Metadata ViewerInspect name, MIME type, size and modification time.Files to ZIP PackagerBundle multiple files into a ZIP archive locally.
Compression Tools
Data Conversion Tools
CSV to JSON ConverterTurn CSV (or any delimited file) into a JSON array.YAML to JSON ConverterParse YAML configuration into JSON.HTML to Markdown ConverterConvert HTML fragments into Markdown.JSON to TOML ConverterConvert JSON config into TOML format.Markdown to HTML ConverterRender Markdown to clean HTML.Delimiter ConverterSwitch CSV between comma, tab, semicolon and pipe.
Security Tools
Strong Password GeneratorCrypto-random passwords with full policy control.Passphrase GeneratorDiceware-style memorable passphrases.Password Strength TesterEstimate entropy and crack-time of a password.API Key GeneratorRandom hex / Base64 secrets of any length.Basic Auth Header GeneratorBuild and decode Authorization: Basic headers.JWT DecoderInspect JWT header, payload and signature metadata.Checksum VerifierCompare a file hash against the published digest.
UUID Tools
UUID GeneratorRandom RFC 4122 v4 UUIDs, bulk generation included.UUID v7 GeneratorTime-ordered sortable UUIDs for databases.ULID Generator26-character lexicographically sortable unique IDs.GUID GeneratorMicrosoft-style bracketed GUIDs.UUID ValidatorValidate a UUID/GUID and detect its version & variant.
Color Tools
Hex Color PickerInteractive picker with HEX, RGB and HSL output.Color Code ConverterConvert between HEX, RGB, HSL and named colors.Color Contrast Checker (WCAG)Verify text contrast ratios against WCAG AA/AAA.Color Palette GeneratorShades, tints and complementary schemes from one color.Random Color GeneratorBatch random colors with copyable codes.CSS Named Colors ReferenceAll 148 CSS color names with codes and previews.
Web Tools
HTML Meta Tag GeneratorBuild title, description, OG and Twitter card tags.robots.txt GeneratorCompose a correct robots.txt with sitemaps and rules..htaccess Redirect Generator301/302 redirect and HTTPS-force snippets.JSON-LD Structured Data GeneratorCreate schema.org JSON-LD for articles, products and FAQs.Email Address ObfuscatorEncode emails to defeat scrapers.Favicon GeneratorRender text or color into a real .ico file locally.
Unit Converters
Length ConverterConvert metres, kilometres, centimetres, inches, feet, yards, miles and nautical miles.Weight ConverterConvert kilograms, grams, tonnes, pounds, ounces, stones and carats.Temperature ConverterConvert Celsius, Fahrenheit, Kelvin and Rankine with the formulas shown.Volume ConverterConvert litres, millilitres, US and imperial gallons, cups, pints, quarts and fluid ounces.