Barcode Scanner

Frequently Asked Questions

What barcode formats can this scanner read?

The Barcode Scanner supports 13+ formats including EAN-13, EAN-8, UPC-A, UPC-E, CODE128, CODE39, CODE93, ITF, Codabar, Data Matrix, QR Code, Aztec, and PDF417. It automatically detects the barcode type, so you don't need to select the format manually. The scanner covers all major retail, inventory, and shipping barcode types.

Why isn't my barcode being detected?

Ensure good lighting when scanning, hold the camera steady, and make sure the entire barcode is visible in the frame. The barcode should be flat and facing the camera directly. For damaged or partially obscured barcodes, try adjusting the angle or distance. If using image upload, ensure the barcode is clearly visible and not distorted.

Can I scan barcodes from screenshots or saved images?

Yes! Click on "Upload Image" mode and either drag and drop an image file or click to browse. The scanner will analyze the image and decode any barcode found. This works with screenshots, photos, and any image containing a barcode. Supports JPG, PNG, GIF, and WebP formats.

What's the difference between EAN-13 and UPC-A?

EAN-13 is a 13-digit barcode used internationally for retail products. UPC-A is a 12-digit barcode primarily used in North America. Both encode the same product data—UPC-A can be converted to EAN-13 by adding a leading zero, and EAN-13 can be converted to UPC-A by removing the leading zero. The scanner automatically identifies both formats.

Why can't I scan EAN-2 or EAN-5 barcodes?

EAN-2 and EAN-5 are supplemental barcodes that contain additional data like issue numbers or suggested prices. They cannot exist standalone—they must be attached to a main barcode (EAN-13, UPC-A, or EAN-8). If you're trying to scan just the supplement, it won't work. Scan the main barcode instead, which may include the supplement data.

Does the scanner work with all types of cameras?

Yes, the scanner works with both front and back cameras on mobile devices, tablets, and desktop webcams. On mobile devices, you can switch between cameras using the "Switch Camera" button. The scanner automatically adjusts to different camera resolutions and focuses on detecting barcodes in real-time.

Is there a limit to how many barcodes I can scan?

No limits at all! Scan as many barcodes as you need, completely free. Your scan history is saved locally in your browser and can hold up to 50 recent scans. You can clear the history at any time or delete individual entries. There are no usage restrictions or hidden fees.

Can I look up product information from scanned barcodes?

Yes! After scanning a barcode, click the "Search Web" button to search the barcode value on Google. This will show product information, pricing, and other details if the barcode is for a known retail product. This is useful for price checking, product lookup, or inventory verification.

Is my scan history private?

Absolutely. Your scan history is stored locally in your browser's localStorage and is never sent to any server. It remains on your device and persists between sessions. You can clear the history at any time using the "Clear History" button. No one but you has access to your scan history.

What does the format detection tell me?

The format detection identifies which barcode symbology was detected (EAN-13, CODE128, QR Code, etc.). This helps you understand what type of barcode you're scanning, which is useful for inventory systems, retail applications, or logistics. Each format has specific use cases—EAN-13/UPC for retail, CODE128 for shipping, QR Code for digital data.

About Barcode Scanner

Barcode Scanner is a powerful client-side tool that instantly decodes linear barcodes and 2D codes using your device camera or uploaded images. It supports 13+ barcode formats covering all major use cases: EAN-13 and EAN-8 for retail products, UPC-A and UPC-E for North American retail, CODE128 for shipping and logistics (supports all ASCII characters), CODE39 for manufacturing and inventory, ITF for shipping containers, Codabar for libraries and healthcare, and Data Matrix, QR Code, Aztec, and PDF417 for 2D codes with higher data capacity. Barcode scanning works by analyzing the patterns of bars and spaces (for linear barcodes) or modules (for 2D codes) and converting them to digital data. The scanner uses the ZXing library for reliable detection and decoding of barcode symbologies directly in your browser. Choose camera mode for real-time scanning using your device camera with front/back camera switching, or upload an image file to scan from screenshots or photos. Select which barcode formats to detect for faster, more accurate scanning when you know the barcode type. The scan overlay provides visual feedback with an animated scan line, and successful scans trigger a vibration on supported devices. View scan history with format type, timestamp, and one-click copy for any previous result—history is stored locally in your browser and persists between sessions. After scanning, copy the decoded value to clipboard, download as a text file, or search the web to look up product information. All barcode scanning happens entirely in your browser using JavaScript—no images or decoded data are sent to servers for complete privacy. Perfect for retail price checking, product lookup, inventory tracking, warehouse management, shipping label scanning, library book checkout, event ticket verification, asset tag scanning, grocery shopping for price comparison, and manufacturing quality control. Use this tool to scan any barcode or QR code instantly with your camera or from images—no account required, completely free.

Unlike many online tools that require account creation or have hidden costs, Barcode Scanner is completely free and requires no signup. Simply open the tool and start using it immediately. Your privacy is our priority - all processing happens locally in your browser, and your data is never stored on our servers.

Whether you're a professional, student, or casual user, Barcode Scanner is designed to be intuitive and efficient. Our tool works seamlessly on desktop computers, tablets, and mobile devices, ensuring you can get your tasks done wherever you are.