Help and Support: Fix Common QR Code Problems

Link2QR is a self-serve tool with no support desk and no email inbox to check. There is no channel here that promises a reply. The good news is that almost every question people have already has an answer on this site, in the free tools and guides below.

Fix a QR code that will not scan

Most problems people run into are about a code that will not scan, and almost all of those have a self-serve answer. These pages are free and need no account:

• Why is my QR code not scanning walks through the most common causes, in order of likelihood, from low contrast to a printed size that is too small.
• Decoder reads a damaged or blurry code back and shows exactly what it encodes. It runs a repair ladder (grayscale, contrast, thresholding, inversion, scaling) before giving up, so it often recovers codes a phone camera rejects.
• Reliability audit grades a code across eight categories and names the specific problem, such as insufficient contrast or a missing quiet zone.
• Print size calculator gives the minimum physical size for a given scan distance. Printing too small is the single most common cause of a code that works on screen but fails on paper.
• Scanner checks what a code actually opens before you trust it.
• Do QR codes expire explains why a code from another provider may have stopped working, which is usually a dynamic redirect that was switched off.
• The FAQ covers formats, logos, error correction, and commercial use.

Diagnosing a bug yourself

Because the generator runs entirely in your browser, most issues are specific to a browser or device. Checking the following usually finds the cause:

• The content type you selected, such as URL, WiFi, vCard, or Multi-link.
• Your browser and version, and whether you are on desktop or mobile.
• The export format you used, such as PNG, SVG, JPEG, PDF, GIF, or STL.
• Any customization that was active, such as an uploaded logo, an art style, or a non-default error correction level.
• Whether the exported file opens and scans correctly in the scanner above.

Never put real WiFi passwords, personal contact details, or anything else sensitive into a QR code you are only using to test a problem. A placeholder that reproduces the same issue is enough.

Privacy and data requests

There is nothing to request or delete. QR code content is encoded in your browser and never stored on Link2QR servers, uploaded logo images are processed locally, and there are no accounts, so there are no stored credentials. Our codes are static and contain no redirect, which means we cannot see who scanned one or when. The website itself uses Google Analytics and may show ads through Google AdSense, both of which use cookies; the privacy policy explains what those collect and links to Google's own controls for that data.

Business use, integrations, and automation

There is no partnerships desk, but most business needs are already covered by the tool itself. If you want to generate codes programmatically, the URL API may already cover it, and batch generation handles CSV input for large runs without any custom work.