How it works
User-Agent detection is heuristic and can be spoofed. Prefer feature detection and client hints for application behavior.
Apply ordered browser, OS and device signatures to the input string.
Common questions
Is parsing exact?
No. User-Agent strings vary and can be spoofed; treat output as a hint.
Is my User-Agent uploaded?
No. The sample is parsed locally.
Independent developer utility. Review output before using it in production.