Developer tools
Format, decode, convert and generate the things you reach for every day. Everything runs in your browser, so tokens and data never leave your machine.
- JSON formatterFormat, validate, minify and sort JSON.
- JWT decoderRead a token's header and claims, and verify its signature.
- Base64 encoder and decoderEncode and decode text or files, URL-safe included.
- URL encoder and decoderPercent-encode and decode text, and take a URL apart.
- Regex testerTest JavaScript regular expressions with live matches.
- UUID generatorGenerate v4 and v7 UUIDs in bulk, or inspect one.
- Unix timestamp converterEpoch seconds to dates and back, in UTC and your time zone.
- Hash generatorSHA-256, SHA-512, SHA-1 and MD5 of text or files, plus HMAC.
- Password generatorStrong random passwords and pronounceable passphrases.
- Color converterHEX, RGB, HSL, OKLCH and CMYK, with a WCAG contrast check.
- Text diff checkerCompare two texts and see every added, removed and changed line.
- Cron expression explainerRead a crontab schedule in plain words and see its next run times.
- IP subnet calculatorCIDR ranges, netmasks and host counts for IPv4 and IPv6.
- Chmod calculatorTick permissions, get the octal and the chmod command.
- HTTP status codesEvery status code, what it means and when to send it.
- CIDR aggregatorCollapse a list of IPs and ranges into the fewest CIDR blocks.
- CSV to JSON converterCSV to JSON and back, with quotes and types handled properly.
- Cron expression builderPick a schedule, get the cron line and its next runs.
- JWT generatorSign a JSON Web Token with HS256, HS384 or HS512.