Playground
Everything runs locally in your browser — nothing is uploaded, nothing is logged. Fast, private, and always available.
Format, validate and minify JSON with instant feedback.
Decode and inspect JSON Web Tokens locally and safely.
Create strong, configurable passwords with a strength meter.
Encode and decode Base64 strings both ways.
Generate v4 UUIDs in bulk with one click.
Test regular expressions against sample text with live matches.
Generate placeholder text by words, sentences or paragraphs.
Generate harmonious palettes and copy the tokens.
Craft CSS gradients visually and export the code.
Convert between Unix timestamps and human dates.