Tiny Online Tools
Understand Browser, OS, and Device from User Agent Strings
When debugging client-side issues, analyzing user reports, or reviewing support tickets, you often get user agent strings—long, cryptic strings that contain information about the user's browser, operating system, device, and engine. Parsing these strings manually is tedious and error-prone.
A user agent string like Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 contains valuable information, but you need to know how to interpret it. This User Agent Parser decodes it instantly, extracting browser name, version, OS, and device type.
What Gets Parsed
Browser: Name and version of the browser (Chrome, Firefox, Safari, Edge, etc.)
Operating System: The OS being used (Windows, macOS, Linux, iOS, Android, etc.) and version if available
Device: Mobile phone, tablet, desktop, or other device type
Engine: The rendering engine (WebKit, Gecko, Blink, etc.) and version
Why This Matters for Development
QA & Bug Reports: When a user reports "the site looks broken," you get their user agent string. Parsing it immediately tells you their browser and OS, helping you understand if it's a browser-specific issue or platform-specific problem.
Analytics & Statistics: Understand which browsers, devices, and OS versions your users are using. This data helps prioritize bug fixes and features.
Feature Support Testing: Different browsers support different features. Knowing exactly which browser and version a user has helps you determine if a feature should work or if the user has an older browser.
Support & Troubleshooting: When supporting users, quickly identify their environment to suggest workarounds or upgrades if needed.
A/B Testing & Rollouts: Check if issues correlate with specific browsers or platforms by parsing user agent data from error logs.
Common Developer Workflows
Support Ticket Analysis: User reports a problem in a ticket. Extract their user agent string from browser console logs or server logs, paste it here, and immediately see if they're on a mobile device, older browser version, or unusual OS.
Error Log Investigation: Server logs contain user agent strings. Parse them quickly to understand what devices and browsers encountered errors, identifying patterns.
Analytics Debugging: Your analytics show traffic from an unfamiliar user agent. Parse it to understand what device/browser it is.
QA Reporting: QA finds a bug and includes their user agent. Parse it to see the exact environment the bug occurred in.
Mobile vs. Desktop Issues: Quickly check if an issue is mobile-specific or desktop-specific by parsing the user agent string.
Browser Version Testing: See what version a user has to determine if a bug is version-specific or browser-wide.
Real-World Example
Paste: Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3.1 Mobile/15E148 Safari/604.1
Get: iOS 17.4 on iPhone, Safari 17.3.1
Instantly know it's a mobile issue on an Apple device using Safari.
Copy Results
Parsed information displays in a clear table. Copy individual values or the entire result for documentation or ticketing systems.
100% Local Parsing
Parsing happens in your browser using pattern matching against known user agent formats. No server involved, no external API calls needed. Works instantly and privately.