QR Code Generator
Enter a URL, text, or Wi-Fi details to instantly generate a QR code image.
Generated QR codes are not stored on the server, and the image can be downloaded right away.
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About QR Codes and Error Correction
A QR code (Quick Response code) is a two-dimensional barcode developed by Denso Wave that encodes data such as URLs or text as a pattern of black and white squares. Compared to a traditional barcode, it can hold far more data and can be read quickly from any angle.
QR codes include built-in error correction (using Reed-Solomon codes), which lets a scanner recover the encoded data even if part of the code is dirty or damaged. There are four error correction levels — higher levels tolerate more damage, but the same data produces a denser, more complex pattern.
- L (Low): Recovers from up to ~7% damage. Best when you want to maximize data capacity.
- M (Medium): Recovers from up to ~15% damage. A good balance for most general-purpose uses.
- Q (Quartile): Recovers from up to ~25% damage. Useful for outdoor signage that may get dirty.
- H (High): Recovers from up to ~30% damage. Best when overlaying a logo or when maximum durability is needed.
QR Code is a registered trademark of DENSO WAVE INCORPORATED. This tool uses the open-source PHP QR Code library (LGPL).