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BUZZ NEXTERS TOOLS
Runs on your device

QR Code Tester

Upload your QR code before printing. We decode it and measure contrast, quiet zone, module size, blur, distortion and robustness.

Choose a file or drop it here

Click to browse · PNG, JPG, WEBP · up to 25 MB

Runs in your browser: your files and data never leave your device.

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What is QR Code Tester?

A QR code tester analyzes an image of a code and rates how reliably it will scan.

How to use QR Code Tester

  1. 1

    Upload an image of the QR code.

  2. 2

    Review each check and the overall rating.

  3. 3

    Fix problems in the generator or with QR Code Fixer.

Features

  • Nine technical checks
  • Robustness test with blur, downscaling and noise
  • Clear good / attention / risk ratings
  • Content preview

Supported formats

  • JPG
  • PNG
  • WEBP

Practical uses

  • Check designed codes before printing.
  • Diagnose codes that customers can't scan.

Limitations

  • Tests are estimates from the image; always try real phones at the real size and distance.
  • Printing quality, surface and lighting can't be simulated.

Frequently asked questions

My code is rated "attention"—should I change it?

It will likely scan in good conditions, but improving the flagged item makes it more reliable.