PrivQR

Makers who want a QR code they can print in three dimensions can paste a URL or plain text here and export it as a model. The converter produces raised or recessed STL geometry, and the same content can also be downloaded as SVG, PNG or a complete production pack.

Before exporting, the page scores the print risk of the content that was entered and offers a phone scan preview, so a code can be checked against a real camera rather than assumed to work. Guidance sections cover the best settings for 3D printed QR codes and answer common questions about the STL export.

The tool runs in the browser, and the site states it is free with no sign-up. It sits within a wider priv QR site that also lists a QR to STL generator and further guides.