User-Agent String Generator
Look up User-Agent header strings for any browser, device, or bot — and copy ready-to-run code
A reference of standard User-Agent strings across operating systems and browsers — desktop, mobile, tablet, and search engine crawlers — with cURL, Fetch, and Requests snippets generated on the fly so you can drop the header straight into your code.
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
How to use
- Choose a category to simulate: Desktop, Mobile, Tablet, or Bot.
- Pick a device or browser from the preset list to see its User-Agent string.
- Need something custom? Type or edit a User-Agent directly in the input field.
- Switch between the cURL, Fetch, and Requests tabs below, then copy the snippet into your script.
FAQ
- Can I see my own User-Agent?
- Yes. The tool reads your browser's navigator API on load, parses your actual User-Agent, and shows it right away — you can drop it into the simulator with one click.
- When would I need a crawler's User-Agent?
- Mostly for SEO work: spoofing Googlebot and friends lets you check locally how your page responds to a search engine crawl and whether robots.txt is blocking anything before it hits production.
- Does using this tool actually change my browser's navigator.userAgent value?
- No — the tool only generates the header string and code snippets for you to copy; it doesn't modify the navigator.userAgent of the browser you're currently using. To actually spoof the UA sent in requests, you'll need your browser DevTools' network conditions override or a separate extension/proxy.