Format, minify, and validate JSON entirely in your browser.

Compare two JSON documents and highlight structural differences.

Generate UUID v4 identifiers with crypto.getRandomValues.

Encode and decode Base64 strings safely in the browser.

Decode JWT header and payload without verifying signatures or leaving the page.

Encode and decode URI components.

Pick colors and convert between hex, RGB, and HSL.

Generate fluid CSS clamp() values for type and spacing.

Build CSS box-shadow declarations visually.

Test regular expressions with live match highlighting.

Preview Markdown as HTML with a simple client-side renderer.

Convert Unix timestamps to human-readable dates and back.