QR / BARCODE TOOL · ONLINE
QR Code Reader Online
Scan a QR code from an uploaded image using supported browser barcode APIs.
Read QR codes from image files locally when the browser provides the BarcodeDetector API. Check the payload before downloading, then scan the finished code at the size people will actually use.
Browser support varies; current Chromium browsers work best.
Ready — choose your input and options.
The website loads online. For supported file and text workflows, processing happens in your browser rather than through a Kaazo upload queue.
What QR Code Reader does — and what it doesn’t
Read QR codes from image files locally when the browser provides the BarcodeDetector API.
A QR code can be valid and still be hard to scan
Blur, glare, perspective, tiny modules and low contrast can prevent decoding even when the underlying symbol is correct. A clear original image gives the reader the best chance.
Recognition depends on browser support and image quality. A code can be perfectly valid yet unreadable from a blurred or heavily cropped photo.
decode QR screenshots
Decode QR screenshots. Check a generated QR before printing. Both jobs fit because they ask the tool to do exactly what its output is designed for, without adding an unrelated conversion.
When QR Code Reader isn’t the right endpoint
If the code contains a URL, decoding only tells you the encoded destination; it doesn’t establish that the destination is safe or trustworthy.
FAQ
What does QR Code Reader actually do?
Read QR codes from image files locally when the browser provides the BarcodeDetector API.
What can change the QR Code Reader result?
Blur, glare, perspective, tiny modules and low contrast can prevent decoding even when the underlying symbol is correct. A clear original image gives the reader the best chance. Recognition depends on browser support and image quality. A code can be perfectly valid yet unreadable from a blurred or heavily cropped photo.
Should I test the code before printing it?
Yes. After QR Code Reader, scan the exported code on a real device and verify the payload or action. Print size, contrast and the destination itself can fail even when generation succeeds.
Related tools
After QR Code Reader, test the exported code on a real device before building another asset around it. The QR reliability guide has broader context if you need it.