🔍 Barcode Reader
Upload any image to decode its barcode or QR code content — CODE128, EAN-13, UPC, QR and more. Free, private, no signup.
Scanning image for barcodes...
About This Barcode Reader
The Barcode Reader decodes both 1D barcodes (like CODE128, EAN-13, UPC) and 2D barcodes (like QR codes and Data Matrix) from uploaded images. It uses the ZXing library, the same engine used by many professional barcode scanning apps.
Your image is processed entirely in your browser — nothing is uploaded to any server, making it completely private.
Supported Barcode Formats
- 1D Barcodes: CODE128, EAN-13, EAN-8, UPC-A, CODE39, ITF, Codabar
- 2D Codes: QR Code, Data Matrix, PDF417, Aztec
Tips for Better Results
- Ensure the barcode is in focus and not blurry
- Good lighting and contrast helps — avoid shadows over the barcode
- Crop the image to focus on just the barcode area
- Screenshots of digital barcodes work very well
How Barcode Scanning Works
A barcode reader analyses the contrast between dark bars and light spaces to decode the data encoded within. Traditional laser scanners shine a beam across the barcode and measure the reflected light. Camera-based readers — like this online barcode reader — capture the full image and use software algorithms to locate and decode the barcode pattern. The ZXing library powering this tool scans the entire uploaded image for any recognisable barcode structure, supporting dozens of 1D and 2D formats.
Common Reading Failures and Fixes
If the barcode reader fails to detect your code, the most common causes are image blur, poor contrast, or the barcode being too small relative to the image size. Try cropping the image tightly around just the barcode and uploading the crop. For physical barcodes, use even lighting and avoid shooting at an angle. Damaged or wrinkled barcodes often need a fresh reprint to scan reliably.
Frequently Asked Questions
What barcode formats can be decoded?
This barcode reader supports 1D barcodes (CODE128, EAN-13, EAN-8, UPC-A, CODE39, ITF, Codabar) and 2D codes (QR Code, Data Matrix, PDF417, Aztec) via the ZXing JavaScript library.
Is my image uploaded to a server?
No. Your image is processed entirely in your browser using the ZXing JavaScript library. Nothing is uploaded to any server and nothing is stored anywhere.
Why can't the reader detect my barcode?
Common causes include a blurry image, poor contrast between the barcode and background, the barcode being too small, or partial damage. Crop the image to show only the barcode and run it through the barcode reader again.
Can I scan a barcode from a product photo?
Yes, if the barcode is clearly visible. Take a close-up photo in good lighting and ensure the full barcode fits in the frame — this barcode reader handles clear, well-lit product photos reliably.
What barcode formats can this reader decode?
+The reader decodes all major 1D barcode formats including EAN-13, EAN-8, UPC-A, UPC-E, CODE128, CODE39, ITF (Interleaved 2 of 5), and Codabar, as well as 2D formats including QR codes and Data Matrix. Upload a clear, high-contrast image for the best detection results.
Why is my barcode not being recognized?
+The most common causes are a blurry or low-resolution image, poor contrast between the bars and background, partial cropping of the barcode, or physical damage to the bars. Try capturing a sharper photo with better lighting, ensure the entire barcode including the white quiet-zone margins is fully visible, and avoid scanning at an extreme angle.