HTTP Status Code Lookup
Look up any HTTP status code and what it actually means.
Developer
Developer
Runs offline
User Agent Parser
Break a User-Agent string into browser, engine, OS and device.
Input
0 charsOutput
0 charsCtrl↵to run
Questions
Why does every browser claim to be Mozilla?
Compatibility archaeology. In 1994 Netscape sent "Mozilla/5.0" and servers began gating features on it, so every subsequent browser copied the prefix to avoid being served a degraded page. The string is now a fossil record of thirty years of that arms race.
Should I use the User-Agent for feature detection?
No. Test for the feature itself. UA strings are spoofable, are being deliberately frozen and reduced by browser vendors, and encode no reliable capability information. Parse them for analytics, not for behaviour.
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