What is a User Agent?

A User Agent (UA) is a text string that your browser sends to every website you visit. It acts like an "ID card" that tells the server your browser version, operating system, and device type.

Why Switch User Agents?

• Mobile Redirection: Check if your site properly redirects mobile users to `m.example.com`.
• SEO Audits: See how your site appears to Googlebot to ensure content isn't being hidden from search engines.
• Feature Detection: Test if certain CSS or JS features are being served or blocked based on browser identification.
• App Banners: Verify that "Download our App" smart banners appear only on relevant mobile OS strings.

How to Use

Select a device from the list to update the User Agent string. Use the "Copy" button to grab the string for use in automated testing tools like Selenium, Playwright, or your browser's native developer tools.