Free Online QR Code Generator
Convert URLs, text, Wi-Fi passwords, and contact info into custom downloadable QR codes. 100% client-side privacy.
1. Choose Content Type
Enter a full URL including https:// for instant browser redirection.
2. Styling & Error Correction
Live Preview & Export
Excellent Contrast Ratio (17.9:1)
Optical phone cameras will easily scan and decode this high-contrast pattern.
How QR Codes Work: Anatomy, Error Correction & Best Practices
1Position Detection Patterns
The three prominent square bullseyes in the corners allow mobile optical scanners to recognize code orientation, scale, and angle at 360 degrees instantly.
2Reed-Solomon Redundancy
Mathematical polynomial redundancy lets decoders reconstruct lost binary bits even if up to 30% of the graphic is ripped, smudged, or covered.
3Quiet Zone Margins
A clean border around the QR code isolates the matrix modules from surrounding background graphics and ensures zero scan false-positives.
Recommended Print Sizing & Scanning Distances
The golden rule for physical print design is the 10:1 scanning ratio: The QR code width should be at least 1/10th of the intended scanning distance. For a business card held 20 cm away, a 2 x 2 cm QR code works reliably. For a tradeshow banner scanned from 2 meters, size the code to at least 20 cm.
Always use SVG vector format when passing artwork to print shops, InDesign, or Figma. Unlike PNG raster bitmaps, vector SVGs never pixelate or blur.
Frequently Asked Questions
Clear, concise answers to common questions about Base64 decoding, encoding, and specifications.