Scan QR Codes From Images Decode QR codes from uploaded images to extract the embedded text or URL.

What Is QR Code Reader?

A QR code reader that decodes QR codes from uploaded image files. Upload a photo or screenshot containing one, and the tool detects, locates, and decodes it to extract the embedded text, URL, or data. Decoding is performed entirely in your browser using Canvas pixel analysis. Handles codes at various angles, sizes, and quality levels. Decoded content is displayed with copy-to-clipboard and URL opening options.

Why Use QR Code Reader?

• Decodes QR codes from any image file
• Automatic detection and decoding
• Handles various sizes and quality levels
• Client-side processing for privacy

Common Use Cases

Screenshot Scanning

Decode QR codes from screenshots when camera scanner is unavailable.

Batch Processing

Extract data from multiple QR code images on your device.

Verification

Verify generated QR codes contain correct data before printing.

Data Recovery

Extract URLs and text from QR codes in documents.

Technical Guide

The image is drawn onto Canvas to extract pixel data via getImageData. The pixel data is passed to a QR detection algorithm that locates finder patterns (three corner squares), determines boundaries and orientation, samples the module grid, applies error correction, and decodes the data payload. The algorithm handles perspective distortion and partial obscuring.

Tips & Best Practices

• 1
  Ensure the QR code is clearly visible and not too blurry
• 2
  Crop image to focus on the QR code for better detection
• 3
  Higher resolution images produce more reliable results
• 4
  Works with screenshots, photos, and scanned documents

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Frequently Asked Questions

Q What image formats are supported?

Any format — JPG, PNG, WebP, GIF, BMP. As long as the QR code is visible.

Q Can damaged QR codes still be decoded?

QR codes have built-in error correction, so partially damaged codes may still decode.

Q Can it scan multiple QR codes in one image?

The tool detects and decodes the first QR code found in the image.

Q Is my image sent to a server?

No — decoding happens entirely in your browser.

Q Why does QR code decoding fail sometimes?

QR code may be too small, blurry, or damaged. Try a clearer image.

About This Tool

QR Code Reader is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.