You paste a URL, choose an expiry time (preset or custom duration), and TempQR generates a shareable link and a QR code that points to that expiring link.

The expiring link stops redirecting to the target URL. People scanning the QR after expiry will see that the link is no longer available.

You can use quick presets (including 1 minute and 5 minutes) or a custom duration. The maximum selectable expiry is up to 10 years.

No. Generate a new one with the updated URL or expiry duration.

Chat apps cache previews aggressively. Some apps show an image card, others show only a link. Sending the same link later may still show the old preview until the cache refreshes.

Yes. TempQR is currently free to use.