QR Code Generator

How QR codes work

The data you enter is converted into bits, wrapped with error-correction data and laid out across the grid. The three large squares in the corners are finder patterns: they tell a scanner where the code is and how it is rotated, which is why a QR code still reads upside down or at an angle. Error correction adds redundancy, so a code can still be decoded when part of it is scratched, blurred or covered — Low keeps the code small, while High tolerates more damage at the cost of a denser pattern.

Common uses

• Linking a poster, flyer or packaging to a web page.
• Sharing guest Wi-Fi without reading out a long password.
• Adding contact details or a phone number to a visiting card.
• Menus, price lists and event schedules in shops and restaurants.
• Feedback or registration forms at a stall or reception desk.
• Quick access to an app download page or a support email.

What information can a QR code store?

Anything that can be written as text: a URL, a plain message, a mailto: link with a subject and body, a tel: number, or a Wi-Fi string containing the network name, security type and password. Capacity depends on the character set and the error correction level, and roughly a few thousand characters is the practical ceiling. Long content produces a very dense code, so shorter data scans faster and prints smaller.

Static vs dynamic QR codes

A static QR code holds the data itself. Once printed, the content cannot change — but it also has no dependency on any service staying online. A dynamic QR code stores a short redirect link owned by a provider, so the destination can be edited later and scans can be counted, at the cost of relying on that provider. This tool creates static QR codes, so what you encode is exactly what a scanner reads.