Question 1

How do I scan a whole folder of QR codes at once?

Accepted Answer

Drag the folder onto this page. Every image in it is read in the browser and each code appears with the file it came from. A zip works the same way, and several folders can be added one after another.

Question 2

Are my images uploaded anywhere?

Accepted Answer

No. The decoder is WebAssembly running in the tab, and the page's Content Security Policy allows no outbound connection at all, so it could not send a file even if it tried. The images never leave the device.

Question 3

Can it read more than one QR code in the same photo?

Accepted Answer

Yes. Every code in an image is decoded, not only the first, and the live camera view reads several codes in the same frame at once.

Question 4

What happens when a code cannot be read?

Accepted Answer

The row says a code was found but not read, and the thumbnail shows where. Clicking the picture opens it with a box already drawn around the code, which can be adjusted and read again on its own.

Question 5

Does it work without an internet connection?

Accepted Answer

Once the page has loaded, yes. There is also a command line version for macOS, Linux and Windows that scans folders on disk and needs no browser.

Question 6

Can it create QR codes as well as read them?

Accepted Answer

Yes. Any code that was read can be recreated as PNG, JPEG, SVG or PDF, and a column of a CSV file can be turned into a batch of codes in one step.