QR code contrast checker
Measure the real contrast between your modules and their background — including both ends of a gradient, which is where brand colours actually fail.
Drop a QR code here
PNG, JPG, WebP, SVG or PDF, up to 10 MB. You can also paste from the clipboard.
Your file never leaves your browser.
What is measured
Eight checks run on the pixels you dropped in, right here in this tab. The eighth one is the one to read: the code is deliberately blurred, shrunk and washed out, and re-decoded after each step, so the report is a demonstration rather than an opinion.