Web Security
How to Scan a QR Code from an Image or Camera
Read QR codes from saved images or a camera, verify the decoded URL before opening it, and understand common reasons a QR code fails to scan.
In this article
How to Scan a QR Code from an Image or Camera
Duck Cloud's QR Code Reader reads QR codes from an image or camera locally in the browser.
Scan from an image
For best results:
- keep the full QR code visible;
- preserve the quiet space around it;
- avoid blur;
- use enough resolution;
- crop unnecessary background when helpful.
Scan with a camera
Hold the camera steady and ensure the code is well lit, fully visible, and large enough to focus.
Inspect URLs before opening
A QR code can point to any URL. Check domain spelling, suspicious subdomains, URL shorteners, and unexpected login pages before opening unknown destinations.
QR phishing
Malicious QR codes can lead to fake payment pages, credential phishing, scam support sites, or malware downloads.
Common scan failures
- low contrast;
- physical damage;
- insufficient quiet zone;
- tiny print size;
- glare;
- blur.
Verify your own codes
Use QR Code Generator, then scan the exported image with QR Code Reader.
For URL codes, verify the destination using Website Status Checker and Redirect Checker.
Print workflow
- Verify the URL.
- Generate the code.
- Export at sufficient resolution.
- Keep a clear quiet zone.
- Print one proof.
- Test multiple phones.
- Verify redirects.
- Print the full batch.
A QR reader reveals what is encoded. You still need to decide whether the destination is trustworthy.