QR Code Scanner
Scan and decode a QR code from an uploaded image or straight from your camera — instantly, with nothing sent to a server.
What is a QR Code Scanner?
A QR code scanner reads the pattern of squares in a QR code and decodes it back into the original data — a link, a message, Wi-Fi credentials, or contact details — without needing a phone's camera app. This tool decodes a QR code two ways: drop or upload an image that contains one, or scan a code live using a webcam or phone camera. Either way, the decoded content appears as plain text the moment it's read, ready to copy.
It's useful any time a QR code needs to be checked or read without physically scanning it with a phone — verifying what a code actually points to before sharing it, reading a code from a screenshot or a printed document, or scanning one from a laptop that doesn't have a camera app built for the job.
GuideHow to use it
How the decoding works
A QR code encodes data as a grid of black and white modules, along with fixed marker patterns in three corners that let a scanner find the code's position, size, and rotation regardless of the angle it was captured at. Decoding reverses that process: the image is converted to grayscale, the marker patterns are located, the grid is read module by module, and the underlying data is reconstructed using the same error-correction scheme the code was generated with — which is also why a partially damaged or obscured code can often still be read successfully.
Why it helpsFeatures & benefits
Why people scan QR codes before opening them
A QR code hides its destination until it's scanned, which makes checking one before acting on it a reasonable precaution — a link can be read here without a phone actually navigating to it. It's also useful for anyone maintaining printed materials or signage: re-scanning a code confirms it still points where it's supposed to, and decoding an old or damaged code recovers content that might otherwise be lost if the original source is gone.
Why this runs entirely in your browser
The image or camera frame never leaves the device — decoding happens locally in JavaScript using the same techniques a native scanner app uses, without uploading anything to a server first. That keeps the result instant, works without a network connection once the page has loaded, and means camera access is only ever used to read a frame for decoding, never recorded or transmitted anywhere.
Getting a reliable scan
For an uploaded image, make sure the QR code fills a reasonable portion of the frame and is in focus — a code that's tiny, blurry, or heavily compressed can lose enough detail to fail decoding even though it looks fine to the eye. For camera scanning, good lighting and holding the code steady a short distance from the lens matters more than resolution. If a scan doesn't succeed on the first try, moving slightly closer or reducing glare on a glossy print usually resolves it.
Frequently asked questions
A few things people usually want to know before scanning.
PNG, JPG, and WebP images all work — drop the file in or click the upload area to choose one from your device.
Only if you use the "Use camera" option. The browser will ask for permission, and the camera is only used to read a frame for decoding — nothing is recorded.
Usually a blurry, tiny, or heavily cropped code. Try a clearer image, better lighting for camera scans, or move the code closer to fill more of the frame.
Often, yes — QR codes include built-in error correction, so a code with minor damage or a small logo overlay can still decode successfully.
No. Every scan is decoded locally in the browser. Nothing is sent to a server or saved after the tab is closed.