Developer tools
Everyday utilities for developers that run entirely in your browser. Nothing you paste is sent to a server, so they are safe to use with API responses, tokens and configuration files.
JSON Formatter
Beautify or minify JSON with syntax validation and configurable indentation.
JSON Validator
Check whether JSON is valid and find the exact position of syntax errors.
JSON to CSV
Convert JSON arrays into CSV with automatic flattening of nested objects.
CSV to JSON
Convert CSV to a JSON array with header detection and type inference.
Base64 Encoder / Decoder
Encode text or files to Base64 and decode Base64 back — UTF-8 and URL-safe.
URL Encoder / Decoder
Percent-encode or decode URLs and query parameters and inspect query strings.
JWT Decoder
Decode JSON Web Tokens and inspect header, payload and expiry.
UUID Generator
Generate random v4 or time-ordered v7 UUIDs in bulk.
Unix Timestamp Converter
Convert Unix epoch time to human dates and back, in any time zone.
Regex Tester
Test JavaScript regular expressions with live match highlighting and groups.