AIAZHHow To Use
- Choose Scan Method — Upload a QR code image or click Start Camera to scan in real time. No server upload — all decoding runs locally in your browser.
- Point or Upload — For camera mode, point your camera at the QR code. For image mode, select a PNG, JPG, or WebP file containing a QR code.
- Automatic Detection — The tool automatically detects and decodes the QR code using BarcodeDetector or jsQR, extracting URLs, text, WiFi credentials, vCard data, and more.
- Copy Decoded Content — Click the copy button to save the decoded text, URL, or WiFi password to your clipboard for easy pasting.
- Keep It Private — Your images and camera feed never leave your browser. No data is ever sent to any server. Close the tab and it's gone.
Frequently Asked Questions
What is a QR code scanner online free?
A QR code scanner online free is a browser-based tool that decodes QR codes from uploaded images or your device camera. This free QR code reader supports URLs, text, WiFi credentials, vCard contacts, phone numbers, emails, SMS messages, and calendar events — all processed locally without any server upload.
Does this tool support camera scanning?
Yes. You can use your device camera to scan QR codes in real time. Click "Start Camera" to begin scanning, and the tool will automatically detect and decode QR codes using the BarcodeDetector API (Chromium) or jsQR fallback.
Can I upload a QR code image instead?
Yes. Upload a PNG, JPG, or WebP image containing a QR code, and the tool will detect and decode it automatically. The scanner handles rotated, tilted, and partially obscured QR codes.
What QR code formats are supported?
The tool decodes standard QR codes containing URLs, text, WiFi credentials (WPA/WPA2), vCard contact data, phone numbers, email addresses, SMS messages, calendar events, and geographic coordinates.
Is my data kept private?
Yes. All image processing and decoding happens locally in your browser using the jsQR library and BarcodeDetector API. Your images and camera feed are never transmitted anywhere.
Free QR Code Scanner Online — Scan QR from Image or Camera
This QR code scanner online free decodes QR codes from uploaded images and live camera streams using pure JavaScript — no server uploads required. Simply upload a screenshot, photo, or downloaded QR code image, or use your device camera to scan a QR code in real time. The scan QR code from image feature supports PNG, JPG, and WebP formats, while camera mode uses the BarcodeDetector API on Chromium browsers with jsQR as a reliable fallback. The QR code reader extracts encoded content including URLs, plain text, WiFi network credentials (SSID and password), vCard contact information, email addresses, phone numbers, SMS messages, calendar events, and geographic coordinates. All image processing and QR decoding happens locally in your browser — your images and camera feed are never transmitted anywhere.
How QR Code Reader Technology Works
When you upload an image or capture a camera frame, the QR code reader draws it onto a hidden canvas and extracts the raw pixel data. The scanning engine analyzes the image to find the three finder patterns (the square position markers in three corners of a QR code), determines the QR code's version and error correction level, applies data masking and Reed-Solomon error correction, and finally decodes the data bits into readable content. This process happens in milliseconds for typical images. The scanner supports QR codes at various angles and lighting conditions. For best results, ensure the QR code is well-lit, in focus, and fills a reasonable portion of the image frame. Works offline — no internet connection needed once loaded.