A growing collection of free, client-side tools for everyday development tasks.
Convert cron expressions to plain English
Encode and decode Base64 strings
Encode and decode URL components
Format and validate JSON
Format JSON, HTML, CSS, JS and TypeScript
Rich text editor with auto-generated TOC and cross-references
Generate JSON Schema from sample JSON
Create and sign JWT tokens (HS256)
Generate QR codes from any text or URL
Generate color palettes from a base color
Generate placeholder text
Test HTTP API endpoints
Decode and inspect JWT tokens
Compare two texts and highlight differences
Write and preview Markdown in real time