Random User Agent Generator

Realistic User-Agent Strings for Testing, Not Guesswork

Testing how a site behaves for different browsers, checking a scraper's request headers, or debugging a responsive layout without owning every device — all of that needs a believable User-Agent string, not a made-up one that no real browser would ever send. This generator builds from real-world templates for Chrome, Firefox, Safari, Edge, and major search bots across Windows, macOS, Linux, Android, and iOS.

How to use it

• Filter by browser, operating system, and device type, or leave everything on "Any" for a varied mix.
• Set how many strings you want (up to 50) and hit Generate.
• Copy a single string with the button next to it, or copy/export the whole batch as a .txt or .json file.

Real-world use cases

QA testing how a web app renders or behaves across different browser/OS combinations without a full device lab, populating test fixtures or mock API responses with realistic request headers, feeding a batch of UA strings into a load-testing or scraping script, or just checking what a Googlebot or Bingbot User-Agent actually looks like.

Frequently asked questions

What is a User-Agent string?

It's a text header every browser sends with its requests that identifies the browser, rendering engine, and operating system — servers use it to decide what content or layout to serve.

Are these real User-Agent strings?

They're built from the same structure and version ranges real browsers currently use, so they're realistic and well-formed, though the exact string a live copy of Chrome or Firefox sends will vary slightly by patch version.

Can I generate mobile-only or desktop-only strings?

Yes, use the Device Type filter to restrict results to just desktop or just mobile templates.

Does this include search engine bot User-Agents?

Yes — select "Search Engine Bots" under Browser to get Googlebot, Bingbot, and DuckDuckBot-style strings, useful for testing how your site's robots handling responds to crawler traffic.

Is generating User-Agent strings for testing legal?

Yes, it's a completely normal and widely used QA/development practice. This tool just produces text strings — what you do with them (like spoofing a header in your own testing tools) is your responsibility.