Scan it with your phone before you print five hundred of them.
Why you can trust this page
The code never expires and tracks nobody. Services that sell “dynamic” QR codes route your scans through their server so they can charge you monthly and log every visitor — and the code dies when you stop paying. This page writes your text straight into the image. There is nothing in the middle, so there is nothing to expire and nobody watching.
It runs entirely on your machine. The security policy at the top of this file tells your browser to refuse every kind of network connection. Your Wi‑Fi password and your contact details never leave this page — enforced by the browser, not promised by us.
It is the real thing, built from the specification. Encoding, Reed–Solomon error correction, mask selection — all implemented here in the open, in this file, and tested by machine-decoding every one of the 160 size-and-tolerance combinations the standard defines.
You are reading the whole program. This one file is the entire tool and its own source — open it in a text editor, or attach it to an AI and ask what it does. What you check is what runs, because there is only the one file.