Error correction allows a QR code to be read even when partially damaged or covered. Level L recovers 7% of data — good for clean digital screens. Level M (15%) is the default and suits most use cases. Level Q (25%) is ideal for QR codes on surfaces that may get scratched. Level H (30%) is best for logos overlaid on the QR code, but produces a denser, larger code.

Yes — completely. This tool generates QR codes entirely in your browser using open-source libraries. There are no watermarks, no subscriptions, no account required, and no usage limits. The downloaded PNG and SVG files are clean and ready to use.

For most printed materials, choose Large (1024px) to ensure the highest resolution output. As a rule of thumb, a QR code should be at least 2 cm × 2 cm when printed, and the scanning distance should be no more than 10× the code's width. For billboards or large posters, export as SVG and scale to any size without quality loss.

Yes. Use the Foreground color picker to change the module (dot) color, and the Background color picker for the quiet zone. Make sure there is sufficient contrast between the two colors — scanners need at least a 4:1 contrast ratio to reliably decode the code. Avoid reversing dark/light if the background becomes too close to the foreground.

Paste your full URL (including https://) into the input box. The QR code generates instantly. We recommend using HTTPS URLs and keeping them as short as possible — shorter URLs produce simpler, more scannable codes. You can also use a URL shortener before generating the QR code to reduce density.