Developer tools
A toolbox of everyday developer utilities — format JSON, decode tokens, generate UUIDs, and convert timestamps, all client-side and private.
Developer
JSON Formatter
Beautify and minify JSON with adjustable indentation.
Open tool →Developer
JSON Validator
Check whether JSON is valid and see the exact error.
Open tool →Developer
UUID Generator
Generate random version 4 UUIDs individually or in bulk.
Open tool →Developer
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text.
Open tool →Developer
URL Encoder / Decoder
Percent-encode or decode URLs and query parameters.
Open tool →Developer
JWT Decoder
Decode a JWT's header and payload without a server.
Open tool →Developer
Unix Timestamp Converter
Convert between Unix timestamps and human dates.
Open tool →Developer
Regex Tester
Test regular expressions against text with live matches.
Open tool →Developer
Cron Expression Generator
Build cron schedules and read them in plain English.
Open tool →