Runs locally — nothing is uploaded
Result
Nothing yet — enter data or press Example.
How to use
- 1Paste a User-Agent from a log, or leave the field empty to check your own browser.
- 2Read the browser, engine, OS and device type.
- 3For a bot, see who runs it and why it visits.
No, any client can send any string. To confirm a crawler such as Googlebot, check that the reverse DNS of its IP ends in googlebot.com, or compare it with the operator's published IP list.
Browsers send "Windows NT 10.0" for both. When you check your own browser, Client Hints (where supported) reveal the real version.
GPTBot crawls for training and indexing; ChatGPT-User fetches a page because a person asked ChatGPT to. Claude (ClaudeBot / Claude-User) and Perplexity have similar pairs.
No, parsing happens in your browser.
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