Free Developer Tools

Fast, private, browser-based utilities for developers. No signup. No tracking. Your data never leaves your device.

converters

Convert JSON to YAML instantly, free and online

Convert JSON to CSV format instantly

Convert Unix timestamps to readable dates

Encode or decode Base64 strings instantly

Convert YAML to XML format

Generate UUID v4 identifiers instantly

Build cron expressions visually

Format and validate .env files

Remove hidden metadata from photos instantly

Test regular expressions with live highlighting

Decode JWT tokens and inspect claims