User Agent Parser
Parse browser user agent strings to identify browser, OS, device.
About User Agent Parser
ToolsOfIndia built the User Agent Parser for developers, analytics users and support teams who want straight answers in plain language. Parse a user-agent string into browser, operating system, device type and version, which is needed to log analytics, debug a bug or route a support ticket. User-agent strings are messy, and the tool extracts the structured fields cleanly, distinguishing a phone from a tablet and a browser from a bot. Developers use it to debug a device-specific bug, analytics users to classify traffic, and because everything runs locally, nothing is uploaded. The tool also detects bots and crawlers so they can be filtered from stats. It is the parser that reading a user-agent by eye never gets right. Everything is processed locally in your browser, so pasted code, tokens or client data never leaves your device - no uploads, no logs, no tracking. Typical moments to reach for it: debugging a device-specific bug, classifying analytics traffic, or identifying a bot in a log. Results update as you type, so you can play what-if games instead of redoing the whole calculation.
How to Use the User Agent Parser
- Open the User Agent Parser tool above — it loads instantly in your browser.
- Enter your values in the input fields provided.
- The result updates immediately — no calculate button needed (or click Calculate where shown).
- Copy or use your result directly. Nothing is stored or sent to any server.
Key Features of User Agent Parser
- Browser/OS/Device detection
- Parse any UA string
- Detailed breakdown
- Copy results
- Browser, OS and device extraction
- Bot and crawler detection
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user agent • browser detection • device detection • user agent string • browser parser • os detection • device info • user agent parser • ua parser • browser detector • device detector • user agent string parser — all available free on ToolsOfIndia.com.
Frequently Asked Questions
What is a User Agent string?
A User Agent (UA) string is sent by browsers and apps to identify themselves to web servers, containing information about the browser, version, rendering engine, operating system, and device.
Why parse User Agents?
Websites parse UA strings to deliver device-appropriate content, track browser analytics, detect bots, optimize layouts for specific browsers, and gather usage statistics.
Can User Agent strings be spoofed?
Yes, User Agents can be changed in browser settings or developer tools. While generally reliable for analytics, security-critical applications shouldn't rely solely on UA detection.
What is a user-agent string?
A header the browser sends identifying itself, the OS and the device, which the tool parses into structured fields.
Can it detect bots?
Yes, common crawlers like Googlebot are flagged, so they can be filtered from analytics and logs.