Interactive Git graph & CLI sandbox

Master Git branching, rebases, merges, cherry-picks, detached HEAD, and stashes with a live reactive DAG graph and interactive terminal.

Typing test for developers

Practice everyday typing, code symbols, terminal commands, and long-form developer text. Tracks WPM, accuracy, streak, and consistency score.

Live markdown preview

Split-pane markdown editor with real-time preview. Perfect for writing README files, documentation, and blog posts with export to HTML.

Mermaid diagram editor & previewer

Interactive Mermaid diagram editor with live SVG rendering, theme selection, presets, zoom/pan canvas, and export to SVG, PNG, and .mmd.

Generate & Read QR Codes

Create custom QR codes for URLs, Wi-Fi, Contacts, and Text with color & logo options, or upload/scan QR codes to decode content instantly.

Format & validate JSON

Paste raw JSON to instantly format, validate, and minify it. Essential for debugging API responses and reading nested data structures.