User-Agent Checker & Bot Identifier
Paste any user-agent string to identify the browser, crawler, or scraping tool behind it — and understand why UA strings alone aren't enough.
User-agent strings are self-reported and trivially spoofed
A scraper can claim to be Googlebot with one line of code. Real bot verification requires checking the request's actual source IP/ASN against the crawler's published ranges, combined with TLS fingerprinting and behavioural signals. How DataSec verifies bot claims →
Frequently asked questions
What is a user agent?
A user agent is a string that software sends to web servers to identify itself — browsers include their name and version, bots include their crawler identity. It's entirely self-reported.
Can a bot fake its user agent to look like a browser?
Yes, trivially — that's exactly why UA strings alone are a weak signal. A scraper can claim to be Chrome 124 with one line of code. Real bot detection requires cross-referencing the claimed identity against actual network, TLS, and behavioural signals.
How does DataSec verify bots more reliably?
DataSec combines UA analysis with TLS fingerprinting (the TLS handshake of a real Chrome differs from a headless browser claiming to be Chrome), device fingerprinting, ASN/IP data, and behavioural signals — no single check is sufficient.
Want reliable bot detection that goes beyond UA strings?
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