Decode

Read QR codes and barcodes from an image, right in your browser.

Live: https://zxing.shallow90125.workers.dev

Decode runs zxing-cpp compiled to WebAssembly (via zxing-wasm) on the client. Images are never uploaded anywhere.

Features

• Drop an image, paste it from the clipboard, or pick a file
• Detects multiple barcodes in a single image and outlines each one on the preview
• Supports the formats zxing-cpp can read, including QR Code, Micro QR Code, Data Matrix, Aztec, PDF417, EAN/UPC, Code 128 and Code 39
• Copy the decoded text, or the full raw result as JSON

Tech stack

• SolidJS + TanStack Start (SPA mode)
• Tailwind CSS
• zxing-wasm
• Vite+ toolchain
• Hosted on Cloudflare Workers

Development

vp install
vp run dev

The dev server starts at http://localhost:3000.

vp check
vp test

Deployment

vp run deploy

This builds the app and deploys it with Wrangler. Run wrangler login first if you are not authenticated.

Third-party licenses

The licenses of third-party software shipped to the browser are listed in public/THIRD_PARTY_LICENSES.txt, which is also served at /THIRD_PARTY_LICENSES.txt.