Let users know when their internet connection is lost.
CheckConnection.link detects lost internet access and displays a clear notification banner. When the connection is restored, users are notified automatically.
No account, API key or framework required.
Immediate network detection
Reacts immediately when the browser detects that the device has gone offline.
Real connectivity checks
Checks independent connectivity endpoints instead of relying only on the browser's online status.
Multilingual
Automatically uses the language defined on the page and falls back to English.
One-line installation
Add this script before the closing
</body>
tag. The banner is created automatically.
- No HTML banner required.
- No message appears during a normal online page load.
- Offline stays visible until the connection returns.
<script src="https://cdn.checkconnection.link/v2.js"></script>Free and simple connection monitoring
Suitable for dashboards, booking systems, administration panels, forms, kiosks and PWAs.