QR Code Generator
What this tool does
A QR (Quick Response) code is a two-dimensional barcode that stores text - a URL, a Wi-Fi password, a message, contact details, or any short string - in a pattern of black and white squares that a phone camera can scan instantly. This tool takes whatever text you type in and generates a QR code image you can scan, download, or embed anywhere.
Enter your text or URL, pick a size, and click Generate QR Code. The image appears below the form as a scannable QR code.
How it works
The text you enter is encoded into a grid of light and dark modules using the standard QR code algorithm, which also adds redundant error-correction data so the code can still be scanned even if it's partly smudged, poorly lit, or printed small. This tool uses error-correction level M (medium), which can recover roughly:
The size setting controls how large each square ("module") in the QR code renders as - it does not change what's encoded, only how big the final image is.
Example
Typing https://kartama.com and generating a QR code produces an image
that, when scanned with any phone camera, opens that exact URL - no app
needed on most modern phones, since QR scanning is built into the
default camera app.
Notes
- Longer text needs a denser (more detailed) QR code to encode the same amount of information, so very long text produces a more intricate pattern - shorter, focused text (like a plain URL) scans more reliably, especially at small print sizes.
- There's no limit on how many times you can generate a code, and nothing you enter is stored beyond generating the image.