No, blurry QR codes do not work. QR codes that are too blurry are unscannable. Burry QR codes are commonly the result of poor image quality. To ensure your QR code is scannable, make sure you are using the correct file format. If your marketing material is digital, you can add the QR code as a PNG or JPG file. However, if you use a bigger printing medium like a billboard or poster, save the QR code in a vector file format, like PDF, EPS, or SVG, to ensure high quality and scannability.