Processed locally
Your input stays in this browser.
Local checks
A passed check means the rendered image was decoded in the local test described by the tool. It does not test every phone, print process, viewing distance, reflection, fold, stain or camera angle.
Logos and colours
Contrast and protected-area rules reduce risk but do not remove it. If a logo version is marked unreadable, do not download or print it. Always test a physical proof with the devices your audience uses.
Destinations
We do not inspect or endorse addresses encoded by users. Scan unfamiliar codes cautiously and verify the destination before entering credentials.