Can I change my JA3 fingerprint?

Not easily. Determined by browser and OS. Tor Browser or Firefox resistFingerprinting may standardize it.

Does a VPN hide my JA3?

No. TLS parameters are visible to every HTTPS server, including through a VPN.

The server-side equivalent -- a fingerprint of the server's TLS Server Hello.

Why is browserleaks involved?

TLS Client Hello cannot be observed from JavaScript. Browserleaks reflects your handshake parameters.

TLS / JA3 Fingerprint

Free online TLS/JA3 fingerprint checker. See how websites track you through your encrypted connection handshake — your TLS fingerprint is uniquely identifiable.

Free online TLS/JA3 fingerprint checker. See how websites track you through your encrypted connection handshake — your TLS fingerprint is uniquely identifiable. Open the tool -- your TLS fingerprint is fetched automatically from browserleaks.com. Review your JA3 hash, TLS version, and cipher suite. Compare your fingerprint hash to see how unique it is across browsers. Learn what the JA3 fingerprint reveals and how to reduce its tracking potential. Fetches TLS handshake parameters from tls.browserleaks.com directly from your browser when that service allows it. The JA3 hash identifies your browser and OS combination based on TLS version, cipher suites, and extensions.