Check your QR code
Your image stays on this device. The decoded content is shown here, never opened automatically.
A starting size is approximately 4.0 cm square at that distance. This is a rough rule of thumb, not a guaranteed minimum. Use a dark code on a light background, keep a clear border, and test a printed proof with different phones and lighting.
How to check a QR code
Choose a clear PNG, JPEG or WebP image that includes the whole code and the empty space around it. The checker reads the picture on your device and displays the encoded text. It never automatically opens a decoded address, so inspect a destination before visiting it. If the image does not decode, try a larger original file instead of a screenshot compressed by a messaging app.
A code can contain a web address, contact information or other text. Successful decoding here tells you only that the image could be read by this software; it does not verify the destination, security, or whether a real phone will scan a printed version.
Choosing a size for print
Enter the distance between the code and a person scanning it. The helper uses a distance-to-width rule as a starting point, with a small practical floor. This estimate does not account for camera quality, lighting, the number of encoded characters, or how the image is printed. Increase the size when the code is dense or viewed from farther away.
Leave a clear light border around the code, use strong contrast, and avoid placing lettering, folds or artwork across the pattern. Print one proof at its actual intended size and test it on multiple iPhone and Android cameras under the conditions in which customers will use it. See our QR size guide for practical context.
