QR Code Error Correction Levels Explained
L, M, Q, and H control how much damage a code can survive. qrfyy uses M.
By James Dom 路 路
What the four levels mean
Error correction repeats some of the data so a scratch or a small logo does not erase the message. L tolerates the least damage. M, Q, and H tolerate more, and the code gets denser as the level rises. Denser codes need to be printed larger.
What qrfyy uses
qrfyy encodes with level M. It does not offer a control to switch to Q or H. Keep the logo small and leave the blank margin. A logo does not raise the correction level.
What to do if a logo blocks the middle
Shrink the logo or remove it. qrfyy stays on level M, so a large logo is not protected by a higher level. Scan the exported file with the scanner before you print.
FAQ
Will a higher level fix a blurry print?
No. Correction helps with a covered patch. A blurry or low-contrast print can still fail. Print a sharper file.
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