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QR GUARDIAN

Checker

Check a QR code before you open it

Paste the link, upload the image or use the camera. Everything runs on your device and the link never leaves it.

Works in any browser. Nothing is stored or sent.

Both physical vectors, one engine

Swapping a QR sticker and reprogramming an NFC tag are the same attack: same poster, same victim, same goal. Almost every checker covers only the QR. Here both go through the same seven-layer engine.

How it works

Why this checker is different

Your link is not sent
Other checkers forward every URL to an external service. Here it never leaves the browser.
Engine on your device
The same weighted heuristics the Android app uses, running locally.
No limits
No account, no daily quota, no sign-up. There is nothing to run out of.
Reasons explained
We do not just say whether it is dangerous: we show what was found and how much each signal weighs.