User Agent Parser
Extract browser, OS, and device information from a raw User-Agent string.
What is the User Agent Parser?
The User Agent Parser is a free tool that breaks down a raw User-Agent string into readable details: the browser and version, operating system and version, device type, and rendering engine.
It loads your own browser's user agent automatically so you can inspect it immediately, and you can paste any other user agent string to parse it instead. Several sample strings for common browser and device combinations are included for quick testing.
Parsing happens entirely in your browser with no signup. The user agent string you enter is never sent to a server.
How to use the User Agent Parser
- 1Open the tool and review your own browser's user agent, which is loaded into the text area by default.
- 2Paste a different User-Agent string into the text area to parse it instead.
- 3Read the parsed results, which show browser, operating system, device type, and rendering engine in separate cards.
- 4Check the Summary card for a single-line description combining all of the detected values.
- 5Click one of the sample user agents (such as Chrome on Windows or Safari on iPhone) to load and parse a known example.
What you can use it for
- Inspecting your own browser's user agent string while debugging device-specific issues.
- Decoding a user agent captured from server logs to identify which browser made a request.
- Verifying how analytics or detection code will categorize a particular client.
- Testing how mobile, tablet, and desktop user agents are classified before writing detection logic.
- Confirming the rendering engine behind a browser when troubleshooting CSS or JavaScript compatibility.
- Sharing a clear browser and OS summary with teammates when filing a bug report.
Key features
- Automatically loads and parses the visitor's current browser user agent.
- Extracts browser, version, operating system, version, device type, and rendering engine.
- Includes six sample user agents covering Chrome, Firefox, Safari, and Edge across desktop and mobile.
- Generates a combined single-line summary of all detected values.
- Updates the parsed results instantly as you edit the user agent string.
Frequently asked questions
What information can I get from a user agent string?
A user agent string identifies the browser and its version, the operating system and version, the device type, and the rendering engine. This parser extracts all of those fields and presents each one in a separate result card.
How do I find my own browser's user agent?
The tool loads your current browser's user agent automatically into the text area when the page opens. You can also read it yourself in the browser console with the JavaScript property navigator.userAgent.
Can I parse a user agent string from server logs?
Yes. Copy the raw User-Agent value from your logs, paste it into the text area, and the parser will immediately break it down into browser, OS, device, and engine details.
Why does the device type show Desktop when no type is detected?
User agent strings only explicitly label mobile, tablet, and similar device types. When no device type is present in the string, which is normal for desktop browsers, the parser reports the device as Desktop.
Can user agent strings be trusted for security checks?
No. User agent strings are sent by the client and can be freely modified or spoofed. They are fine for analytics and content adaptation, but you should not rely on them alone for security or access decisions.
Is the user agent parser free and private?
Yes. The parser is completely free, needs no account, and runs entirely in your browser. The user agent strings you paste are never transmitted to a server.