What is my user agent?

Shown at the top of this tool — it updates when you change browser or device emulation.

Can websites block my user agent?

Yes — some sites reject unknown or automated UAs.

Rarely fully hide — instead use current browser versions and privacy modes that reduce tracking.

Good bots identify (Googlebot); bad bots spoof Chrome. Use reverse DNS verification for crawlers.

Yes — IP Checker Online user agent checker is free.

Developer Tools

A user agent checker displays the HTTP User-Agent header your browser sends — essential when debugging CDN rules, mobile layouts, or bot blocks.