QR Lab

Drop any QR or barcode image, get a scannability grade, print-size recommendation, quiet-zone and contrast checks, and the decoded payload. 100% client-side; the image never leaves your device.

Grade: ,

Uploaded code
    Decoded payload 
    Decodes with your browser's BarcodeDetector where it exists (Chrome, Edge and Android browsers). Safari and Firefox do not ship it, so there the Lab falls back to a built-in QR decoder and can grade QR symbols only; for 1D and other 2D formats use Chrome, or a hardware scanner. Privacy manifesto · Scanner compatibility matrix