QR Code Generator

A QR (Quick Response) code is a 2D barcode that stores data like URLs, text, Wi-Fi credentials, or contact info. It's read by smartphone cameras and scanner apps. QR codes support error correction, meaning they can still be read even when partially damaged or obscured.

A QR code can store up to 7,089 numeric characters, 4,296 alphanumeric characters, or 2,953 bytes of binary data. Longer data creates denser (more complex) codes that are harder to scan. Tip: for URLs, use a URL shortener to keep the QR code simple and scannable from a distance.

The rule of thumb: the QR code should be at least 1/10th of the scanning distance. For a phone at 25cm, minimum 2.5cm. For a poster at 3 meters, minimum 30cm. Tip: always test scanning at the expected distance before printing. Higher error correction levels require larger codes.

Yes, but maintain high contrast between foreground and background. Dark-on-light is most reliable. Avoid placing images over more than 30% of the code area. Tip: use High error correction level when adding logos or reducing contrast, as it allows up to 30% of the code to be recoverable.

A static QR code has data encoded directly — it can't be changed after printing. A dynamic QR code encodes a redirect URL that can be updated later. This tool generates static codes. Tip: for marketing campaigns where you might change the destination, use a URL shortener as an intermediary.