Developer Tools
JSON, JWT, UUID, regex, Base64, SQL, YAML, cron, and more — all free.
Format, beautify, and minify JSON online.
Validate JSON syntax instantly.
Decode JWT tokens and inspect claims.
Generate sample JWT tokens for testing.
Generate GUIDs and UUIDs instantly.
Generate UUID v4 identifiers.
Generate secure random passwords.
Test regular expressions with live matching.
Encode text to Base64.
Decode Base64 to text.
Preview Markdown as HTML.
Format and beautify SQL queries.
Format and beautify XML documents.
Format YAML configuration files.
Build cron expressions visually.
Convert Unix timestamps to dates.
Pick colors and get hex, RGB, HSL values.
Generate QR codes for URLs and text.
Generate placeholder text for designs.