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Press/Index/QR Code
§ PRESS · QR-CODE

QR Code generator.

A two-dimensional matrix symbology standardised as ISO/IEC 18004. Encode up to 4,296 alphanumeric characters. Adjustable error correction from 7% to 30%. Everything renders locally - your data never leaves the browser.

Type
2D Matrix
Capacity
4,296 AN
Standard
ISO 18004
Versions
1 - 40
§ 01 · GENERATE

Live specimen

Pick a preset or paste any text, URL, Wi-Fi string, or contact payload. The preview updates on every keystroke. Download PNG, SVG, or a print-ready PDF.

LIVE
Presetquick start
Error correctionISO/IEC 18004
×
M
● OUTPUTQR · M · 0×0
§ 02 · ABOUT

What a QR code is

Invented by Denso Wave in 1994 for tracking automotive parts. Designed for fast omnidirectional reading: three finder patterns anchor the corners, and Reed-Solomon error correction lets the code be decoded even when partially damaged, dirty, or occluded.

REFERENCE
/01
Error correction
Four Reed-Solomon levels. Higher correction absorbs more damage at the cost of density: L ≈ 7%, M ≈ 15%, Q ≈ 25%, H ≈ 30% of the code can be destroyed and still decoded.
/02
Versions & capacity
Sizes range from Version 1 (21 × 21 modules) to Version 40 (177 × 177). Capacity scales accordingly - up to 7,089 numeric, 4,296 alphanumeric, or 2,953 bytes at the lowest error correction.
/03
Quiet zone
The surrounding empty margin must be at least 4 modules wide for a scanner to reliably separate the code from its background. The quiet-zone control above enforces this.
/04
Common payloads
URLs (https://…), Wi-Fi (WIFI:T:WPA;S:ssid;P:pass;;), email (mailto:…), phone (tel:…), SMS, vCard, geolocation, plain text.