Can I scan a QR code from a screenshot or downloaded image?
Yes. Upload any PNG, JPG, HEIC, WebP, or other image file containing a QR code and it decodes instantly. This is useful for scanning QR codes received in WhatsApp, emails, PDFs, or web pages.
Does this QR scanner work offline?
Once the page has loaded, all decoding happens locally in your browser using the jsQR library. No data — the image or video frame — is ever sent to any server. It works even without an internet connection after the page loads.
Can I use my device camera to scan live?
Yes. Click "Use Camera" and allow camera permission. Point your camera at the QR code. The scanner continuously reads frames from your camera feed and decodes the QR the moment it recognises one.
What types of QR code content can this scanner read?
Any QR code content: URLs, plain text, WiFi credentials, vCard contact data, WhatsApp links, email addresses, phone numbers, location coordinates, UPI payment strings, and any other data encoded in a QR code.
My QR code was not decoded — why?
Common causes: low-resolution image (the QR pattern must be visible), extreme angle or heavy motion blur, very damaged or torn QR code, or a QR code that uses an unusual inverted color scheme (light on dark). Try a clearer, straighter photo.
How do I scan a QR code from my computer screen?
Take a screenshot of the QR code (Cmd+Shift+4 on Mac, Win+Shift+S on Windows), then upload the screenshot file to this scanner. Alternatively, if your webcam faces the screen, you can use the camera mode.
Can I scan a QR code from a PDF?
Take a screenshot of the QR code in the PDF and upload the image. On Mac, use Preview to zoom into the QR code area before screenshotting for better resolution.
Is there a file size limit for uploaded images?
There is no enforced file size limit — the processing is entirely local. However, extremely large images (over 20MB) may be slower to process depending on your device. Standard screenshots and phone photos work instantly.
Which browsers support camera scanning?
Camera access requires a modern browser with WebRTC support: Chrome, Firefox, Edge, Safari (iOS 11+). The page must be served over HTTPS for camera permission to be granted. All modern browsers qualify.
Can this decode micro QR or DataMatrix codes?
This scanner is optimised for standard QR codes (ISO/IEC 18004). It does not decode Micro QR, DataMatrix, Aztec, PDF417, or other 2D barcode formats. For those, a dedicated barcode scanner app is needed.
Is the decoded content stored anywhere?
No. The decoded text is displayed in your browser and nothing is transmitted. When you close or refresh the page, the result is gone. No history, no analytics on your scanned content.