QR Code Generator
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What Your Result Means
- QR Code: A two-dimensional barcode containing the encoded text or URL.
- Input text: The number of characters being encoded (impacts QR version and scan reliability).
- Error correction: Level H allows recovery of up to 30% of corrupted data.
- Output size: The pixel dimensions of the generated QR code.
How This Calculator Works
QR codes are generated using the QRCode.js library, which encodes your input text or URL into a two-dimensional barcode. The generator automatically selects the appropriate QR version based on input length, uses Level H error correction for maximum durability, and renders the result at your chosen pixel size. The code is created entirely in your browser with no server transmission.
Quick Questions
What size QR code should I use?
Larger codes (250-300px) are better for printed materials. Smaller codes (100-150px) work fine for digital displays. Minimum readable size depends on scanner distance and print quality.
Can I customize the colors?
This generator uses standard black-on-white QR codes for maximum compatibility and scannability across all devices and lighting conditions.
How much data can a QR code hold?
QR codes can store up to 4,296 characters of text or 2,953 bytes of binary data. The generator automatically selects the appropriate version for your input.
Is my data sent to a server?
No. All QR code generation happens entirely in your browser. Your text or URL is never transmitted to any external server.
Sources
- QR Code Standards and Specifications (QR code format and version reference)
- QRCode.js Library (JavaScript implementation)
Method & review
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.