Can we resize a QR-Code?

Question

Does anyone know if we can resize a QR-Code easily by using a proper vector program OR, is the size information contained on that code, hence, we will not be able to resize without changing the code ?

Thanks in advance.

Answer 1

You can resize as much as you want. The information is encoded in the pattern of the data, not in the size of the dots themselves. As long as a scanner can resolve properly between light/dark, the QR code should be readable at any size.

Answer 2

Update 2016: If someone happens to need to upscale a QR code image in some sort of browser/webview - you might get away with a simple CSS property:

img {
    image-rendering: pixelated;
}

This way the upscaled image stays sharp.

See a comparison here: http://codepen.io/erkkit/pen/GodxGX

Answer 3

For high resolution (vector image) QR code for printing/publishing:

1. Get your free QR code
2. Right-click-and-save OR PrintScreen the QR code
3. Open/insert it in Photoshop, crop the QR code, and save as *.psd file (default Photoshop format)
4. Open that *.psd file with Adobe Illustrator – and you get the vector QR code. DONE! :)