Small tools for everyday development
- JSON formatterFormat and validate JSON, YAML, TOML, XML, CSV
- Format converterJSON, YAML, TOML, XML and CSV into each other
- JSON SchemaCreate and check a JSON Schema
- Base64Encode and decode text
- URL encode/decodeEncode, decode and split URLs
- Hash generatorMD5, SHA-1, SHA-256 and more for text or files
- UUID generatorRandom or time-ordered UUIDs
- JWT decoderRead a token's header and payload
- Unix timestampUnix time to date and back
- Color converterHEX, RGB, HSL and contrast check
Help & info
About this tool
Free developer tools in your browser: JSON formatter, Base64, URL encoding, hashes, UUID, JWT decoder, Unix timestamp and colors. No sign-up, nothing is sent.
More tools
- JSON formatter – Format and validate JSON, YAML, TOML, XML, CSV
- Format converter – JSON, YAML, TOML, XML and CSV into each other
- JSON Schema – Create and check a JSON Schema
- Base64 – Encode and decode text
- URL encode/decode – Encode, decode and split URLs
- Hash generator – MD5, SHA-1, SHA-256 and more for text or files
- UUID generator – Random or time-ordered UUIDs
- JWT decoder – Read a token's header and payload
- Unix timestamp – Unix time to date and back
- Color converter – HEX, RGB, HSL and contrast check
Frequently asked questions
- Is my data sent to a server?
- No. All tools run in your browser. Text, files and tokens never leave your device.
- Do I need an account?
- No. There is no sign-up and no limit.
- Does it work offline?
- Yes. After the first visit the tools work without internet, and you can install them as an app.
- Are results the same as in my programming language?
- For JSON, Base64, URL encoding, hashes and UUIDs, yes: they follow the standard definitions. Small differences can occur with unusual input.
- Is it safe for secrets such as tokens or keys?
- Processing happens locally, so the content is not sent anywhere. Still, handle real secrets with care and avoid pasting production keys on shared computers.