π€ Upload Image to Scan
Click to upload or drag & drop an image here
Supports JPG, PNG, GIF, WebP, BMP
π· Camera Scan
π Camera access is used only for local scanning. No data is uploaded.
β Scan Result
How to Use
This QR code scanner is simple yet powerful. Here is a detailed guide:
Upload Image: Click the upload area to select an image file containing a QR code from your device (JPG, PNG, GIF, WebP, and BMP are supported). The tool reads the image and decodes the QR code locally. You can also drag and drop an image directly onto the area, or copy an image from another app and press Ctrl+V to paste it here. Once recognized, the result appears below, including the content type (URL, text, WiFi, etc.) and the raw data.
Camera Scan: Click "Start Camera Scan" and grant browser permission. Point your camera at the QR code. The tool analyzes the video stream in real time and immediately displays the result when a valid code is detected, automatically stopping the scan. You can click "Switch Camera" to toggle between front and rear cameras (useful on mobile devices). Camera scanning is processed entirely locallyβvideo is never uploaded to any server.
Result Actions: After a successful scan, the result area shows the decoded content. If the content is a URL, click "Open Link" to visit it directly. Click "Copy" to copy the result to your clipboard. Click "Generate QR" to jump to the QR code generator and recreate a QR code from the scanned content. Scan records are kept temporarily in the history area at the bottom of the page.
Use Cases
QR code scanning is widely used in work and daily life:
Office & Meetings: Quickly scan QR codes on a presentation screen to join video conferences, access shared documents, or download presentation materials. No need to manually type long URLs. In team collaboration, scan a colleague's business card QR code to instantly save contact details.
E-commerce & Retail: Scan product packaging QR codes to get detailed product info, verify authenticity, or participate in brand campaigns. In restaurants, scan table-top QR codes to order, pay, or redeem coupons. Scan receipt QR codes for after-sales tracking or loyalty points.
Education & Learning: Scan QR codes in textbooks or courseware to access supplementary video explanations, online quizzes, or extended reading materials. Students can quickly get links to classroom resources shared by teachers without typing errors. Scan library book ISBN QR codes to check availability or reserve a copy.
Extended Knowledge
How QR codes work: A QR code (Quick Response code) is a two-dimensional barcode invented by Denso Wave in 1994. It stores data using black and white modules arranged in a square grid. Standard QR codes can hold about 7,000 numeric characters or 4,000 alphanumeric characters. QR codes include finder patterns (the square markers in three corners), timing patterns (alternating black and white modules), and data areas. Error correction levels are L (7%), M (15%), Q (25%), and H (30%), allowing the code to be read even if partially obscured or damaged.
Security risks: A QR code is just a data carrier. Malicious actors may use QR codes to spread phishing sites, malware, or scams. Always verify the source before scanning, especially for codes found in public spaces. This tool decodes QR codes locally and does not automatically navigate or execute any actions, so you can inspect the content before deciding whether to visit a link.
QR codes vs. barcodes: One-dimensional barcodes store data in a single direction with limited capacity and require specific scanning orientation. QR codes store data in two dimensions, offering much higher capacity and 360-degree scanning. Besides QR codes, common 2D barcodes include Data Matrix, PDF417, and Aztec Code. QR codes have become the most widely adopted format globally due to fast recognition speed and high fault tolerance.
Frequently Asked Questions (FAQ)
Does this QR scanner require an internet connection?
No. This tool uses pure front-end technology (the jsQR library) to decode QR codes entirely within your browser. Image data is never uploaded to any server. Camera scanning requires WebRTC API support in your browser.
What QR code formats are supported?
All standard QR code formats are supported, including URL links, plain text, WiFi connection details, vCard contacts, phone numbers, SMS, email, and geolocation data. Results are automatically categorized after decoding.
What should I do if scanning fails?
Ensure the QR code image is clear, complete, and unobstructed. Blurry images or cropped codes may fail to decode. Try enlarging the image, increasing resolution, or re-shooting from a different angle before uploading.
Is camera scanning safe?
Yes. This tool processes the video stream locally in your browser and never uploads camera footage to a server. Camera permission is used solely for real-time QR code detection and can be stopped at any time.
Does it support batch scanning?
Currently, single-image scanning is supported. You can upload multiple images one by one, and each result is kept in the history area for easy comparison.
Is my scanned data saved?
No. All scanning operations are performed locally in your browser. No data is saved to any server or local storage. Scan history is cleared when you refresh the page, so please save results manually if needed.
Why can't the camera start?
Make sure your browser has granted camera permission and your device has an available camera. Some browsers require a secure context (HTTPS or localhost) to access the camera. If you are using incognito/private mode, camera access may be restricted.
Does it support barcodes?
Currently only QR codes are supported. One-dimensional barcodes such as EAN, UPC, and Code 128 are not supported. For those needs, please use a dedicated barcode scanning app.