Developer Tools
Free online tools for developers. Format and validate JSON, convert between formats, encode and decode data, test regex patterns and more — all running in your browser without sending your data to any server.
Format, validate and beautify JSON online for free.
Validate JSON syntax and get clear, precise error messages.
Minify and compress JSON to reduce file size.
Format and beautify SQL queries for better readability.
Encode text or files to Base64 and decode Base64 strings.
Encode and decode URLs and query parameters instantly.
Decode and inspect JWT tokens. View header, payload and signature.
Convert Unix timestamps to human-readable dates and vice versa.
Generate random UUIDs (v4) instantly. Copy single or bulk UUIDs.
Test regular expressions live. Highlight matches and inspect groups.
Build and explain cron expressions with a visual editor.