QR Code Generator — Convert URL or Text to QR Instantly
Generate QR codes from URLs, text, or contact info instantly. Download PNG, adjust size, and customize colors — all free with no signup required.
Press Ctrl+Enter to generate instantly
Frequently Asked Questions
Q. What is a QR code?
A QR (Quick Response) code is a 2D barcode that smartphones can scan to instantly access URLs, text, contacts, and more. It was invented by Denso Wave in 1994.
Q. How much data can a QR code hold?
Up to ~7,089 numeric characters or ~4,296 alphanumeric characters. Shorter content (like URLs) produces simpler, faster-scanning codes.
Q. Is my data sent to a server?
No. All QR code generation happens entirely in your browser using the Canvas API. Nothing is transmitted to any server.
Q. Can I change the QR code colors?
Yes — customize both foreground (pattern) and background colors. Ensure sufficient contrast for reliable scanning; dark patterns on light backgrounds are recommended.
Q. What is error correction (ECC)?
Error correction levels (L/M/Q/H) determine how much damage a QR code can sustain while remaining scannable. Level H allows up to 30% damage recovery.
Q. What size should I use for printing?
Print at least 2cm × 2cm for reliable smartphone scanning. Download the PNG at 256px or larger from this tool for best print quality.
How to Use
Type the URL, text, phone number, or any data you want to encode.
Set size, error correction level, and colors to your preference.
The QR code updates in real-time as you type.
Click the download button to save the QR code image.
Expert Knowledge: QR Code Generator — Convert URL or Text to QR Instantly
QR codes were invented by Denso Wave in 1994 for automotive parts tracking and are now a global standard for payments, marketing, and information sharing. Defined by ISO/IEC 18004, they use Reed-Solomon error correction to recover damaged data. QR versions 1–40 offer increasing data capacity. For marketing use, embed UTM-tagged short URLs to enable campaign tracking while keeping the code compact and fast-scanning.
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