Color Picker++
Advanced color picker with harmonies, presets, and history
API Tester
HTTP client with request history, headers, and shareable URLs
JSON Viewer
Collapsible tree view with syntax highlighting and live validation
Regex Tester
Live pattern matching with common patterns library
JWT Decoder
Decode and inspect JWT tokens with expiry detection
CSV to JSON
Drag-and-drop CSV converter with smart parsing options
Diff Viewer
Side-by-side and inline diff with shareable URLs
Keycode Logger
Keyboard event debugger with visual key display
Game of Life Pattern Generator
Draw patterns, simulate, and export coordinates in multiple formats
M5Timer Sync
Configure your M5Capsule Pomodoro timer via USB serial