Barcode Quality Inspector
Check a barcode image for resolution, contrast, sharpness, quiet zone, error correction reserve and GS1 data, with tips to fix each problem. Runs locally in your browser.
Heuristic estimate from the image, not a verification according to ISO/IEC 15415 or 15416. No grades. Results depend on camera, lighting and image processing as much as on the print.
Drop or paste an image here
Images and camera frames are processed locally in your browser. Nothing is uploaded.
Decoding uses zxing-cpp. Contrast, sharpness, module size and quiet zone are measured on pixel brightness; the thresholds are our own heuristics.