QR Code Reader

What is QR Code Reader?

QR Code Reader is a handy tool that allows you to scan and extract information from QR codes directly in your browser. No app installation or special software is required - you can use the following features with just your web browser:

• Real-time scanning with webcam: Instantly scan QR codes using your smartphone or PC camera
• Image file reading: Extract information from saved QR code images

Since all processing is completed within your browser, this tool is available on any device - PC, smartphone, tablet - regardless of operating system. All processing occurs on your device, ensuring your privacy is protected.

Key Features

• Ease of use: Intuitive interface for simple operation
• Multi-device compatibility: Works on computers, smartphones, tablets, and various devices
• Privacy protection: All processing occurs within your browser, and image data is never uploaded to any server
• No installation required: No need for additional software or app downloads
• Automatic detection: Automatically detects and reads QR codes in images

How to Use QR Code Reader

You can read QR codes using two methods:

1. Real-time scanning with camera: Directly scan QR codes using your device's camera
2. Reading from image files: Upload saved QR code images for scanning

How to Scan QR Codes with Camera

1. Camera permission: When using for the first time, your browser will display a dialog asking for camera access permission. Select "Allow".
2. Camera selection: If you have multiple cameras, you can select which one to use.
3. Position adjustment: Adjust the QR code position so it's centered in the camera view.
4. Automatic scanning: When the QR code is properly recognized, the scan result will be displayed automatically.

Tips for Camera Usage

• Good lighting: Make sure the QR code is well-lit for better recognition.
• Prevent shaking: Keep the camera steady and make sure the QR code is clearly visible.
• Optimal distance: The ideal distance between the QR code and camera is approximately 10-20 cm (4-8 inches).

Troubleshooting Camera Access

If you've blocked camera access and need to use it again:

1. Click the lock (🔒) or info (ⓘ) icon on the left side of your browser's address bar
2. Open site settings and change "Camera" settings to "Allow"
3. Reload the page and try again

How to Scan QR Codes from Image Files

1. Select image file: Click the "Upload image" button and select an image containing a QR code.
2. Automatic analysis: The selected image will be automatically analyzed and the QR code detected.
3. Result display: The scan results will appear on your screen.

Tips for Image File Usage

• Image quality: Clearer images provide better scanning accuracy.
• Supported formats: Compatible with common image formats including JPEG, PNG, GIF, and BMP.

QR Code Basics

What is a QR Code

QR Code (Quick Response Code) is a two-dimensional barcode developed by DENSO WAVE INC. in 1994. Compared to traditional one-dimensional barcodes, QR codes have the following features:

• High capacity: Can store thousands of characters of data
• Fast reading: Can be quickly read from any direction
• Error correction: Can be read even when partially dirty or damaged
• Compact size: Represents large amounts of information in a small space

Types and Uses of QR Codes

• Static QR codes: Fixed QR codes whose content cannot be changed once created
• Dynamic QR codes: QR codes that can be modified later using URL redirection
• Custom QR codes: Designer QR codes that incorporate logos or images

Privacy and Security

This tool adopts the following privacy protection principles:

• Local processing: All processing is completed within the browser
• No uploading: Image data is never uploaded to servers
• No history storage: Scan data and history are not saved

Frequently Asked Questions (FAQ)

Q: What should I do if a QR code can't be read?
A: Try scanning the QR code in a well-lit environment, adjust the distance between the camera and QR code to about 4-8 inches (10-20 cm), and if the code is dirty or damaged, try scanning a different QR code.

Q: Is the QR code data I scan safe?
A: All processing is done in your browser, and data is never sent to servers. However, please use caution when accessing URLs contained in QR codes.

Q: What types of QR codes can be read?
A: This tool supports standard QR codes (versions 1-40) and can read various data formats including text, URLs, contact information, and Wi-Fi setup information.

Q: Can I use this on mobile devices?
A: Yes, you can use this tool on smartphones and tablets through their browsers. When using on mobile devices, we recommend using the rear camera.

※ QR Code is a registered trademark of DENSO WAVE INC.