Developer Tools
Everyday developer utilities: JSON formatting, UUID generation, timestamp conversion and JWT decoding.
JSON Formatter
Format, validate and minify JSON online. Pretty-print with 2 or 4 spaces, get precise error positions, and copy or download the result. Nothing leaves your browser.
UUID Generator
Generate random UUID v4 and time-ordered UUID v7 identifiers in bulk, using the browser cryptographic random API. Copy one or all with a click.
Unix Timestamp Converter
Convert Unix timestamps to readable dates and back. Shows local time, UTC and ISO 8601, handles both seconds and milliseconds, with a live current-time display.
JWT Decoder
Decode JWT header and payload into readable JSON, with expiry and issue dates converted to human-readable form. Runs locally — tokens never leave your browser.
Cron Expression Parser
Parse and generate cron expressions online. Supports Linux crontab (5 fields) and Spring scheduling (6-7 fields), with next run times and preset examples. Runs locally in your browser.