LabelPad

A modern desktop app for designing and printing labels on Niimbot D11 and M3 Bluetooth label printers. Runs on Windows, macOS and Linux.

Website and guide · Download

Built with Tauri 2: a React + TypeScript label editor in the system webview, and a Rust backend that talks to the printer over Bluetooth LE (btleplug). The Niimbot protocol in src-tauri/printer is a Rust port of niimbluelib, tested byte for byte against it.

Getting started

Requires Node.js 22+, Rust (stable), and the Tauri prerequisites for your OS. On Windows that's the MSVC build tools and WebView2, which Windows 10/11 already include.

npm install
npm run dev

Turn on the printer, click Connect printer, and pick it from the list. You don't need to pair it in your system's Bluetooth settings first.

How it's built

Path	What it is
src/renderer	React UI: the label editor and its 1-bit renderer
src-tauri/src	Tauri app: commands the UI calls (scan_start, printer_connect, printer_print, …) and the --mcp bridge for AI agents
src-tauri/printer	Printer protocol: packets, image encoding, print jobs and the Bluetooth transport
scripts/gen-protocol.cjs	Regenerates the printer model table and the reference test fixtures from niimbluelib

Designing labels

Add text, dates, images, barcodes, QR codes, icons and shapes from the left toolbar, then drag, resize and rotate them on the label. Everything snaps to the label edges, its center and other elements. The preview is the exact 1-bit image that's sent to the printer.

This is the beginning of the README. Read the rest at the original. Read the full README ↗