Which browser capability does the QR Code Reader use?

It uses the browser BarcodeDetector API to read QR images locally.

What happens when detection fails?

Unsupported browsers or images without QR codes return a warning diagnostic instead of a blank result.

Read QR code images locally in the browser

Runs locally in your browser; input is never uploaded

Encoding & Security

Select QR code imageClick to select or drag files here

Upload a QR code image and run. Supported browsers detect and output the QR content locally.

1.
Which browser capability does the QR Code Reader use?
It uses the browser BarcodeDetector API to read QR images locally.
2.
What happens when detection fails?
Unsupported browsers or images without QR codes return a warning diagnostic instead of a blank result.