QR Code Generator

How QR Codes Work

QR (Quick Response) codes are two-dimensional barcodes that store text, URLs, contact information, or other data scannable by smartphone cameras.

Step-by-step

1. Enter the text or URL you want to encode.
2. Click Calculate to generate a 200×200 pixel QR code image.
3. Right-click the generated image to save it, or scan it with your phone to test.

How QR codes encode data

QR codes use a grid of black and white squares. The encoding algorithm converts your text into binary, then arranges the bits into the grid pattern with positioning squares in three corners (so scanners can orient correctly) and error correction data (so the code works even if partially damaged).

Worked example

Enter "https://calcgems.com" and a QR code is generated that, when scanned, opens that URL in the phone's browser.

Uses

Restaurant menus, business cards, product packaging, event tickets, WiFi network sharing, payment links, and contactless information sharing. Keep QR codes at least 1 inch square for reliable scanning.