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QR Code Generator (Free, No Sign-up, No Expiration)

Error Correction
Size
256px
QR Code

How to Use

  1. Enter text or a URL in the input field.
  2. Select the error correction level (L, M, Q, or H).
  3. Adjust the QR code size if needed.
  4. The QR code is generated in real time.
  5. Click Download PNG to save the QR code image.

What Is a QR Code?

A QR (Quick Response) code is a two-dimensional barcode that stores data in a grid of black and white squares. It was invented in 1994 by Denso Wave, a subsidiary of Toyota, originally to track automotive parts during manufacturing. Unlike traditional barcodes that store data in one direction, QR codes encode information both horizontally and vertically, allowing them to hold significantly more data — up to around 4,000 alphanumeric characters. QR codes can be scanned by any smartphone camera, making them one of the most accessible ways to bridge physical and digital content.

Use Cases

  • URLs — link to websites, landing pages, or app download pages from printed materials.
  • Wi-Fi connection — encode network name, password, and encryption type so others can connect by scanning.
  • Contact cards — share vCard data containing name, phone number, email, and address.
  • Payments — mobile payment services use QR codes for quick point-of-sale transactions.
  • Event tickets — encode ticket IDs or booking references for fast check-in at events and venues.

Tips for Better QR Codes

  • Keep data short — shorter text produces simpler QR codes that are easier to scan, especially at small sizes.
  • Test before printing — always scan your generated QR code with a phone to verify it works correctly.
  • Use higher error correction for physical use — if the QR code will be printed on packaging, posters, or stickers, choose Q or H level to tolerate wear, partial damage, or dirt.
  • Ensure sufficient contrast — QR codes work best with dark modules on a light background. Avoid low-contrast color combinations.
  • Add a quiet zone — leave some white space around the QR code so scanners can detect its boundaries reliably.

Error Correction Levels

  • L (Low): ~7% recovery. Smallest QR code, ideal for clean environments.
  • M (Medium): ~15% recovery. Default, good balance of size and reliability.
  • Q (Quartile): ~25% recovery. Suitable for moderate damage tolerance.
  • H (High): ~30% recovery. Best for QR codes that may be partially obscured or damaged.

Privacy

All QR code generation happens in your browser. No data is sent to any server.