ホーム
190+ ツール — 100% ブラウザ内で動作——データは端末から送信されません。
無料のオンライン開発者ツール。登録・アップロード不要。
カテゴリ
Text Tools25Encoding Tools16Decoding Tools9Hash Tools8Cryptography Tools6JSON Tools9XML Tools4HTML Tools3CSS Tools5JavaScript Tools2Developer Tools6Network Tools3IP Tools6URL Tools4Timestamp Tools6Date & Time Tools7Number Tools10Binary Tools5Hex Tools2Regex Tools3Image Tools6File Tools5Compression Tools4Data Conversion Tools6Security Tools7UUID Tools5Color Tools6Web Tools6Unit Converters4Math & Statistics2Validators & Checksums0
人気
Base64 EncoderEncode text, JSON, URLs or files to Base64, standard or URL-safe.URL EncoderPercent-encode URLs or single query components.Base64 DecoderDecode Base64 (standard or URL-safe) back to text or bytes.SHA-256 Hash GeneratorCompute the SHA-256 digest — the standard for modern integrity checks.AES EncryptPassword-based AES-GCM/CBC encryption using the Web Crypto API.JSON Formatter & BeautifierPretty-print JSON with configurable indentation.CSV to JSON ConverterTurn CSV (or any delimited file) into a JSON array.Cron Expression ParserExplain cron syntax and compute the next 10 run times.DNS LookupQuery A, AAAA, MX, TXT, NS, CNAME and SOA records over DNS-over-HTTPS.IPv4 Subnet / CIDR CalculatorNetwork address, broadcast, wildcard, mask and host range from any CIDR.Unix Timestamp ConverterConvert Unix time to human dates and back, in any timezone.Number Base ConverterConvert integers between bases 2–36.
注目
Base64 EncoderEncode text, JSON, URLs or files to Base64, standard or URL-safe.JSON Formatter & BeautifierPretty-print JSON with configurable indentation.DNS LookupQuery A, AAAA, MX, TXT, NS, CNAME and SOA records over DNS-over-HTTPS.Unix Timestamp ConverterConvert Unix time to human dates and back, in any timezone.Regex TesterLive JavaScript regex testing with match groups highlighted.Strong Password GeneratorCrypto-random passwords with full policy control.JWT DecoderInspect JWT header, payload and signature metadata.UUID GeneratorRandom RFC 4122 v4 UUIDs, bulk generation included.
新着
Percentile CalculatorCompute any percentile of a data set with linear interpolation, plus all deciles.Statistics CalculatorMean, median, mode, range, variance, standard deviation, standard error, quartiles and IQR from a list of numbers.Volume ConverterConvert litres, millilitres, US and imperial gallons, cups, pints, quarts and fluid ounces.Temperature ConverterConvert Celsius, Fahrenheit, Kelvin and Rankine with the formulas shown.Weight ConverterConvert kilograms, grams, tonnes, pounds, ounces, stones and carats.Length ConverterConvert metres, kilometres, centimetres, inches, feet, yards, miles and nautical miles.Favicon GeneratorRender text or color into a real .ico file locally.Email Address ObfuscatorEncode emails to defeat scrapers.JSON-LD Structured Data GeneratorCreate schema.org JSON-LD for articles, products and FAQs..htaccess Redirect Generator301/302 redirect and HTTPS-force snippets.robots.txt GeneratorCompose a correct robots.txt with sitemaps and rules.HTML Meta Tag GeneratorBuild title, description, OG and Twitter card tags.
新着 · SEO
Decode Base64 To String — Free Online Tool | Base64 Decoder 26173ツールSha256 Hash Online — Free Online Tool | SHA-256 Hash Generator 26173ツールGenerate Uuid Online — Free Online Tool | UUID Generator 26173ツールConvert Text To Uppercase — Free Online Tool | Case Converter 26173ツールBase64 Encode String — Free Online Tool | Base64 Encoder 26173ツールFormat Json Online— Free Online Tool | JSON Formatter & Beautifier 26173ツールUrl Encode Query String— Free Online Tool | URL Encoder 26173ツールConvert Unix Timestamp— Free Online Tool | Unix Timestamp Converter 26173ツール
ガイド
JWT Anatomy: Header, Payload, Signature — and Why Decoding Is Not VerifyingCIDR and Subnet Masks Explained with Worked ExamplesJSON vs YAML vs TOML: Configuration Formats ComparedURL Encoding Rules: Reserved Characters and Percent-EncodingUUIDs Explained: v4 vs v7 vs ULID for Database KeysMD5 vs SHA-1 vs SHA-256: Choosing a Hash Function