QR studio
Make a code for any text or address, and read one back out of a photo. Everything happens in this browser tab — nothing is uploaded, nothing is kept.
If what you paste looks like a shortn link, this page checks it and says how long it has left.
Higher error correction makes a bigger, denser code that survives being printed, taped over or seen through a dirty lens. Low is right for a screen at arm's length.
Read a code out of a photo
uses the browser's own detectorChoose an image and this looks for a QR code in it, using the browser's built-in BarcodeDetector. That exists in Chrome and Edge and nowhere else, so on other browsers this does nothing at all. There is no bundled decoder behind it, because a decoder that runs on a server would mean uploading the photo — and this page will not do that.