Developer
JSON, regex, JWT, Base64, URLs, hashes, UUIDs, cron, timestamps, bases, colours, chmod.
Tools in this category
- JSON Formatter & ValidatorFormat, minify and validate JSON, pinpointing the exact line and column of errors.
- Base64 Encoder & DecoderEncode and decode Base64 for UTF-8 text and files, with Base64URL support.
- Password GeneratorNewRandom passwords or memorable passphrases, with strength in bits.
- URL Encode & DecodeNewPercent-encode and decode URLs, edit query parameters, convert IDN to Punycode.
- Hash GeneratorNewMD5, SHA-1, SHA-256 and SHA-512 hashes and HMAC for text and files, plus checksum check.
- UUID GeneratorNewBulk UUID v4 and v7 with formatting options, plus a decoder for version and timestamp.
- Unix Timestamp ConverterNewConvert Unix timestamps to dates and back; auto-detects seconds, ms and µs.
- Color ConverterNewConvert HEX, RGB, HSL, HSV and CMYK; check WCAG contrast; get tints and shades.
- User-Agent ParserNewParse a User-Agent into browser, OS, device and bots like Google, Bing or AI.
- Regex TesterNewTest regular expressions with highlighted matches, groups, replace and a plain-English breakdown.
- JWT DecoderNewRead a JWT's header and payload, check its expiry and verify HS, RS, PS and ES signatures.
- JSON ↔ CSV, YAML, XML ConverterNewTurn JSON into Excel-ready CSV and back, convert JSON ↔ YAML and JSON to XML.
- Cron Expression ExplainerNewTurn a cron expression into plain English, see the next 10 runs in any time zone and build one fast.
- Number Base ConverterNewConvert between binary, octal, decimal, hex and any base 2–36, with two's complement and text ↔ binary.
- HTML Entity EncoderNewTurn < > & " and accented letters into < é… or decode them back, with a table of common entities.
- Chmod CalculatorNewTick read, write and execute boxes to get chmod numbers like 755 or 644 and rwxr-xr-x, with ready commands.
Developer tools: JSON, regex, JWT, UUID, cron
Utilities developers reach for every day when working with APIs, configs and data: format JSON, encode Base64 and URLs, generate MD5 / SHA hashes and UUIDs, convert Unix timestamps and colour codes, and create strong passwords. Whatever you paste is processed in your browser and never sent anywhere, so it is fine for tokens and internal configs.