Cat Printer is a mobile-first web app that connects to pocket BLE thermal printers (such as GB01, GB02, MX06, SC03, and compatible models) directly from your browser using the Web Bluetooth API.
Features
- 384px Canvas: Fixed standard width matching thermal print heads with draggable length adjustment.
- Drawing Tools: 1px Pencil, 7px Marker, and 7px Eraser.
- Typography: Add Sans-serif and Serif text overlays with center alignment and resize/reposition handles.
- Image Dithering: Import photos with automatic Floyd-Steinberg error diffusion dithering for crisp monochrome prints.
- 1-Bit Stickers: Cute stickers with resize, reposition, and rotation handles.
- URL Export: Share or bookmark your design with the Export button, which encodes the 1-bit bitmap directly into the URL fragment.
How to Print
- Power on your Cat Printer.
- Tap Connect in Chrome to select and pair with your printer over Bluetooth.
- Design your receipt and tap Print!