User Agent
What your browser is telling websites about itself, decoded.
Your User Agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Operating system
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version —
Browser
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version —
Bot
ClaudeBot · AI Data Scraper
Your browser didn't send any
Sec-CH-UA-* Client Hints on this request. Either it's not a Chromium browser, or it hasn't been asked to send them yet.
What is a User Agent?
Read more on Wikipedia
The header your browser sends so servers know what to deliver.
The User-Agent header was originally designed so servers could tailor responses to specific browsers. In practice, browsers all lie about being other browsers (the "Mozilla/5.0 ... like Gecko ... Chrome ... Safari" mess is a 30-year inheritance of compatibility hacks).
Don't rely on the User-Agent string for security or feature detection. Use feature detection (the JavaScript way) or Client Hints (the modern HTTP way) instead.