User-Agent Parser
Parse User-Agent strings to identify browser, OS, device type, and rendering engine. Useful for debugging compatibility issues and inspecting web clients.
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How to Use
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- 1
Enter a User-Agent
Paste the User-Agent string you want to analyze into the input field, or click "Detect Current Browser" to auto-fill it.
- 2
View the parsed result
Information about the browser, OS, device type, and rendering engine is displayed in card format.
- 3
Copy the result
Use the copy button to copy the parsed result as JSON to your clipboard.
User-Agent String
Enter a User-Agent string to see the parsed result
About User-Agent Parser
User-Agent Parser breaks down any UA string into its component parts: browser name and version, operating system and version, device type (Desktop, Mobile, or Tablet), and rendering engine. Paste User-Agent strings from server access logs, test environments, analytics platforms, or customer bug reports to instantly identify the client environment. The auto-detect feature shows your current browser's UA string with a single click. It's invaluable for debugging browser-specific issues, filtering bot traffic in log analysis, verifying mobile device detection logic, and understanding which browsers and OS versions your users are running.
Key Features
- Browser name and version detection
- OS name and version detection
- Device type identification (Desktop/Mobile/Tablet)
- Rendering engine detection
- Auto-detect the current browser's User-Agent
Common Use Cases
- Identify the browser and OS from a customer's bug report UA string
- Analyze bot and crawler UA strings from server access logs
- Test UA detection logic for browser-specific feature flags
- Debug user-agent headers in Postman or API test requests
- Verify your own browser's UA string during cross-browser testing
Frequently Asked Questions
What is a User-Agent?
A User-Agent is a string sent by the browser to a web server that contains information about the browser type, version, operating system, and device. Websites use this information to optimize their content delivery.
Is the User-Agent I enter sent to a server?
No. Parsing uses ua-parser-js running locally in your browser. UA strings from customer bug reports or internal systems are never transmitted.
Can all browsers be recognized?
The tool supports major browsers (Chrome, Firefox, Safari, Edge, Opera, etc.), operating systems, and common bots. If a browser cannot be recognized, it is displayed as "Unknown".
What are Client Hints?
Client Hints is a proposed alternative to the traditional User-Agent string that provides browser information in a more structured way. However, the conventional User-Agent string continues to be widely used across servers and analytics tools.