QR Code Scanner

How QR Code Scanner works

Read a QR code from a screenshot or photo. Upload any image containing a QR code and get the decoded text — decoded locally with jsQR. Everything happens inside this page: the tool reads your input, runs the calculation or conversion locally, and hands the result back to you. Nothing is transmitted, because there is no backend to transmit it to.

That design choice is deliberate. Most free tool sites upload your files to a server, process them there, and quietly keep a copy. Toolcin cannot do that — the site is a set of static files. If your connection dropped the moment the page finished loading, every tool would still work.

Reading a code from a picture

Upload an image containing a QR code and the jsQR engine locates the finder patterns, corrects the perspective and decodes the payload. It works on screenshots as well as photographs, which makes it useful for decoding a code you cannot scan with a phone right now.

Decoding happens in the tab — the image is never uploaded.

What makes a scan fail

Low contrast, a photographed screen with moiré, a code that is too small in the frame, or damage beyond the error-correction level. Cropping tightly around the code and increasing contrast are the two fixes that work most often.

A code with a large logo over the centre needs high error correction to survive; if the overlay exceeded the recoverable area, no scanner will read it.

Safety

The decoded text is displayed, not opened. Check the URL before visiting it — a QR code can point anywhere, and the only defence is reading the destination.

Good to know

• Works offline once loaded, including on flights and in locked-down networks.
• No file size limit beyond your device's own memory.
• Free to use, with no account and no usage counter.
• Results are produced locally, so they are not logged or shared with anyone.

Questions