01
Treat each check independently
A successful decode, strong contrast or clear border is useful evidence, but one result does not cancel a warning elsewhere.
Honest checks, no fake score
Check why a QR code may not scan
Upload a QR image to test local decoding and review practical contrast, orientation, quiet-zone, density and resolution observations.
Independent QR checks
Choose a QR code image to inspect
The image is decoded and assessed locally. Each available observation is reported separately.
Step 1
Provide a QR image
Drop a QR image hereor choose a PNG, JPEG, WebP or GIF up to 15 MB
Step 2
Review each check
No image checked yet
Decode, contrast, orientation, quiet zone, density and resolution observations will appear here.
Results are practical observations, not a guarantee that every camera, app, print process or viewing condition will work.
Private by architecture
Your QR image stays on your device
The selected image and decoded contents remain on your device. Analysis runs locally without an upload, account, external API, analytics event or saved history.
Practical guidance
Use the checks as evidence, not a guarantee
Automated image analysis cannot reproduce every print process, camera, material or lighting condition.
02
Test the final physical result
Print size, surface, damage, glare, lighting and camera software are outside an uploaded-image check.
03
Keep four clear modules
Leave an empty border around every side of the QR symbol. Nearby text or artwork can interfere with detection.