Utilities

Precision toolsthat never leave your tab.

No accounts. No cloud pipeline. Your images and JSON stay on-device unless you hit download.

Raster lab
Image compression
Re-encode JPEG, PNG, or WebP with adjustable quality. Preview before and after, then download.
Open tool
Syntax bench
JSON tools
Format with configurable indentation, minify, validate, and copy results — all client-side.
Open tool
Focus grid
Schulte table
Train with a random 5×5 number grid and see the split time for every correct step.
Start training