Does WebRTC leak affect all browsers?

WebRTC is enabled by default in Chrome, Firefox, Edge, Opera, and Brave. Safari has stricter WebRTC privacy controls by default. Internet Explorer does not support WebRTC.

WebRTC Leak Test — Is Your Browser Leaking Your Real IP?

Results reflect IP addresses your browser exposes through WebRTC at the time of this test. A local IP address (e.g. 192.168.x.x or 10.x.x.x) is a private network address and is visible to any website that uses WebRTC. This tool displays technical data only — it does not make security recommendations.

What is a WebRTC leak?

WebRTC (Web Real-Time Communication) is a technology built into most modern browsers that enables peer-to-peer features like video calls, voice chat, and file sharing — without requiring a plugin or app. To establish direct connections between users, WebRTC needs to discover IP addresses using a protocol called STUN (Session Traversal Utilities for NAT).

A WebRTC leak occurs when this IP discovery process exposes your real IP address to websites — even when you are connected to a VPN. Because WebRTC operates at the browser level rather than the network level, some VPNs do not intercept these requests. A website can use a few lines of JavaScript to trigger a WebRTC STUN request and read your actual public IP address, bypassing your VPN entirely.

This is different from a DNS leak. A DNS leak exposes which websites you visit. A WebRTC leak exposes your actual IP address — which is typically a more serious privacy concern.

How to read your results

No WebRTC leak detected means your browser either does not support WebRTC, has it disabled, or your VPN is successfully preventing IP exposure through WebRTC. No public IP addresses outside your VPN were found.

Possible WebRTC leak detected means this test found one or more public IP addresses exposed via WebRTC. If your VPN is active and the detected IP does not match your VPN's exit IP, your real IP address may be visible to websites that use WebRTC.

Local IP addresses (such as 192.168.x.x or 10.x.x.x) are private network addresses — your router's internal assignment to your device. These are visible to any website using WebRTC regardless of VPN status, and are considered lower risk than a public IP leak. However, they can still be used for browser fingerprinting.

How to fix a WebRTC leak

Firefox: Type about:config in the address bar, search for media.peerconnection.enabled, and set it to false. This completely disables WebRTC in Firefox without affecting normal browsing.

Chrome and Edge: Chrome does not allow disabling WebRTC through settings. The most reliable solution is to install a browser extension such as WebRTC Network Limiter (by Google) or uBlock Origin, which can restrict WebRTC IP handling to your default public interface only.

Brave: Go to Settings → Privacy and security → WebRTC IP handling policy → Select "Disable non-proxied UDP." This prevents WebRTC from exposing your local IP address.

Safari: Safari has stricter WebRTC privacy controls by default and is less likely to leak local IPs. No manual configuration is usually required.

Use a VPN with WebRTC leak protection: Some VPN providers — including Mullvad, ProtonVPN, and ExpressVPN — include built-in WebRTC leak protection that routes or blocks WebRTC traffic through the VPN tunnel. Check your VPN's settings or documentation to confirm this feature is enabled.

Which browsers are affected by WebRTC leaks?

WebRTC is enabled by default in Chrome, Firefox, Edge, Opera, and Brave. All of these browsers can potentially expose local and public IP addresses via WebRTC unless additional protections are applied.

Safari implements stricter WebRTC handling and does not expose local IP addresses by default, making it less vulnerable to this type of leak.

Mobile browsers are also affected. Chrome on Android and Safari on iOS both support WebRTC. Mobile VPN users should test their mobile browsers separately from their desktop browsers, as VPN configurations can differ between devices.

Frequently asked questions

What is a WebRTC leak?

A WebRTC leak occurs when your browser's WebRTC feature exposes your real IP address to websites, even when you are connected to a VPN. WebRTC uses STUN servers to discover IP addresses for peer-to-peer connections, and this process can bypass VPN tunnels if the VPN does not specifically block or route WebRTC traffic. It is one of the most common ways VPN users unknowingly expose their real IP address.

How do I fix a WebRTC leak?

In Firefox, type about:config and set media.peerconnection.enabled to false to disable WebRTC entirely. In Chrome and Edge, install WebRTC Network Limiter or use uBlock Origin with WebRTC blocking enabled. In Brave, go to Settings → Privacy and security → WebRTC IP handling policy and select "Disable non-proxied UDP." Alternatively, use a VPN that includes built-in WebRTC leak protection.

Is a local IP address leak dangerous?

A local IP address (e.g. 192.168.1.x or 10.0.0.x) is your private network address assigned by your router. It cannot be used to identify you on the internet or locate you geographically. However, it can be used as part of browser fingerprinting — combining multiple data points to identify your device across sessions. It is a lower-risk exposure than a public IP leak, but still worth addressing for privacy-conscious users.

Does disabling WebRTC break anything?

Disabling WebRTC will prevent browser-based video and voice calls from working — services like Google Meet, Zoom in-browser, Discord web, and similar tools rely on WebRTC. If you use these services regularly, fully disabling WebRTC may be inconvenient. A better approach is to restrict WebRTC IP handling using an extension, which limits IP exposure without breaking video calls entirely.

Can my VPN prevent WebRTC leaks?

Some VPNs include WebRTC leak protection that routes or blocks WebRTC traffic through the VPN tunnel, preventing IP exposure. However, not all VPNs offer this feature, and even those that do may not protect against all types of WebRTC IP disclosure. Running this test with your VPN active is the most reliable way to confirm whether your VPN is protecting you from WebRTC leaks.

What is the difference between a WebRTC leak and a DNS leak?

A DNS leak exposes which websites you are visiting — your ISP can see your browsing activity through unprotected DNS queries. A WebRTC leak exposes your real IP address directly to websites — they can identify your actual public IP even when you are behind a VPN. Both are VPN privacy failures, but WebRTC leaks tend to be considered more serious because they directly reveal your identity rather than your browsing habits.

How accurate is this WebRTC leak test?

This test runs entirely in your browser using the WebRTC API to detect all IP addresses your browser exposes through the STUN discovery process. It does not contact any external server for this detection — the results come directly from your browser. Results are informational and reflect your browser's configuration at the time of the test. Results may vary between browsers on the same device, and between desktop and mobile.

Does this tool store my IP address?

No. This test runs entirely within your browser using JavaScript. Your IP addresses are detected locally by the WebRTC API and displayed only in your browser — they are never sent to our servers or stored anywhere. We do not log, collect, or retain any personally identifiable information from this test.

⚠️ This tool is for informational purposes only. Results reflect IP addresses exposed by your browser's WebRTC feature at the time of testing. A detected IP address does not necessarily indicate a security vulnerability or that your privacy is compromised. This tool does not constitute a security audit and makes no security recommendations. Results may vary between browsers and network configurations. Always consult your VPN provider's documentation for guidance on WebRTC leak protection.