How do I use the user agent parser?
- Paste the user-agent string.
- Press Parse user agent.
- Read the browser, OS, device and bot details.
User agent parser: frequently asked questions
What is a user agent?
A string browsers and bots send with each request describing the software making it.
Can user agents be faked?
Yes. Verify important bots by reverse DNS lookup of their IP.
Which bots does it recognise?
Googlebot, Bingbot, AI crawlers like GPTBot, ClaudeBot and PerplexityBot, SEO tools, and WhatsApp, Facebook, LinkedIn and X preview bots.
Why does every browser say “Mozilla”?
For historical compatibility, nearly all browsers start their user agent with Mozilla/5.0.
Where do I find user agents?
In your server access logs, your CDN logs or browser developer tools.
Is my data uploaded?
No. Parsing runs in your browser.
Is there an API for this tool?
Selected tools are available through a rate-limited public API. Contact us if you need higher volumes.
Is the user agent parser free?
Yes. It is free with no sign-up and no usage limits for normal use.
Is my data sent to your servers?
No. This tool runs entirely in your browser, so what you type never leaves your device.
Does it work on my phone?
Yes. The tool works in any modern browser on iPhone, Android, tablet or computer.