Verify your VPN encryption and anonymity with our free VPN Leak Tester. Cross-reference public IP geolocation timezones against local system clock settings to detect location leaks and routing mismatches with 100% offline privacy.
The tool fetches your public IP geolocation timezone automatically on load.
The discrepancy matrix compares your IP timezone with your local clock timezone.
Check the visual shield icon for 'Secure' status or 'Leak Risk' warnings.
Compares Intl.DateTimeFormat().resolvedOptions().timeZone against IP geolocation data to catch active VPN location leaks.
Provides a clear, color-coded visual indicator displaying whether your VPN connection is secure or leaking geographical location data.
All routing audits execute in local browser JS memory. No IP addresses or location logs are saved on servers.
A virtual private network (VPN) encrypts traffic and routes it through an intermediary server to mask your public IP address. However, improper configuration can allow your real identity to leak through secondary browser channels.
Timezone leaks occur because JavaScript can query the local machine clock via Intl.DateTimeFormat().resolvedOptions().timeZone. If your IP address claims to be in London but your browser clock is configured for Tokyo, web scripts instantly flag a proxy or VPN connection.
Comprehensive leak prevention requires auditing WebRTC STUN requests, verifying DNS server locations to prevent ISP DNS leaks, and matching local device time settings with active VPN endpoint regions.