Developer tools
Format JSON, encode and decode Base64 and URLs, decode JWTs, test regular expressions and generate UUIDs. Free, fast and private.
- Nothing uploaded JSON formatter Format, validate and minify JSON, with clear error messages.
- Nothing uploaded Base64 encoder and decoder Encode text to Base64 or decode it back, with full UTF-8 support.
- Nothing uploaded URL encoder and decoder Percent-encode text for URLs, decode it back, and see a URL’s parts.
- Nothing uploaded JWT decoder Decode a JSON Web Token’s header and claims, and see when it expires.
- Nothing uploaded Regex tester Test a regular expression and see every match and group highlighted.
- Nothing uploaded UUID generator Generate random v4 or time-ordered v7 UUIDs, up to 1,000 at once.
Why it matters that nothing is uploaded
Safe for real tokens and data
Pasting a JWT, an API response or customer data into most online formatters sends it to someone else’s server. These tools run in your browser, so nothing leaves your device.
Instant
There is no round trip to a server, so results appear as soon as you paste.
Check it yourself
Open your browser’s developer tools, switch to the Network tab and use any tool. You won’t see your input sent anywhere.