User Agent Parser - Identify Browser, OS & Device Details Online
Free online User Agent parser tool. Parse any UA string to identify browser, engine, OS, device, and CPU. Uses ua-parser-js. 100% client-side.
Key Features of Our User Agent Parser
π Parse Any UA String
Paste any UA string and instantly see detailed browser, engine, OS, device, and CPU information.
π Browser Details
Identify browser name, version, and rendering engine. Supports Chrome, Firefox, Safari, Edge, Opera, and more.
π» OS Detection
Detect the operating system including Windows, macOS, Linux, iOS, Android and versions.
π± Device Recognition
Identify device vendor, model, and type (mobile, tablet, desktop, console, wearable).
βοΈ CPU Architecture
Detect CPU architecture (x86, x64, ARM, ARM64) from the User Agent string.
β‘ Quick Test Examples
Pre-loaded example UA strings for common browser/OS combinations.
π One-Click Copy
Copy individual field values or the full UA string to clipboard.
π 100% Client-Side
All parsing is local using ua-parser-js. No data sent to any server.
What is a User Agent String?
A User Agent (UA) string is sent by browsers in HTTP headers to identify themselves. It contains the browser, engine, OS, device, and CPU architecture.
A UA parser decodes this into structured data, making it easy to identify the browser and platform.
Why Use a User Agent Parser?
- Browser Detection: Identify browser and version for compatibility
- Analytics: Parse UA strings from web logs for audience insights
- Debugging: Examine UA strings during development
- Device Targeting: Detect mobile, tablet, or desktop
How to Use the User Agent Parser
| Step | Action |
|---|---|
| 1 | Enter a UA String Your browser UA is auto-loaded. Paste any UA string or click an example badge. |
| 2 | View Parsed Results The parser breaks the UA into Browser, Engine, OS, Device, and CPU cards. |
| 3 | Explore Details Each card shows available details. Missing fields show as N/A. |
| 4 | Copy Values Click copy icon next to any value, or copy the full UA string. |
Common Use Cases
π Web Development Testing
Parse UA strings during cross-browser testing for compatibility verification.
π Analytics Processing
Process UA strings from server logs to analyze browser and device distribution.
π‘οΈ Fraud Detection
Analyze UA strings for inconsistencies indicating bots or spoofed requests.
π± Responsive Design Testing
Use device type data to verify responsive design breakpoints.
π§ Debugging Support Issues
Ask users to paste their UA string to identify browser-specific issues.
π Learning UA Structure
Understand how different browsers format their UA strings.
Frequently Asked Questions About User Agent Parsing
What is in a User Agent string?
A UA string contains browser name and version, engine, OS, device model and type, and CPU architecture. Our parser extracts all available data.
Can I see my own browser info?
Yes! Your current browser UA is loaded automatically on page open. You will see your browser, OS, device type, and CPU immediately.
How accurate is the parsing?
This tool uses ua-parser-js, supporting thousands of browser, OS, and device combinations. Results are highly accurate for standard browsers.
Browser engine vs browser itself?
The engine renders HTML/CSS (e.g., Blink, WebKit, Gecko). Multiple browsers can share the same engine but have different features and interfaces.
Is parsing done server-side?
No. All parsing is 100% client-side using ua-parser-js in your browser. No data is sent to any server.
Parse User Agents with Ease
The User Agent Parser from OneTools Online provides a complete toolkit for analyzing UA strings. With real-time parsing, five detailed categories, example presets, and 100% client-side operation, you can understand any UA string instantly.