User Agent Detector
Detect your browser, operating system, device, and user agent string.
User agent parsing tool
Inspect and parse a user agent string
Paste a user agent string or detect your current browser. Results are parsed locally and shown as helpful hints.
Paste a browser, crawler, app, or API client user agent string.
User agent strings can be spoofed, frozen, reduced, or incomplete.
Detection status
Detected
Chrome on Windows, detected with high confidence.
Parsed summary
Browser: Chrome 122.0.0.0
OS: Windows 10 / 11
Device: desktop
Engine: Blink
Bot hint: None detected
Primary status
Detected
Detection should be treated as a helpful hint.
Browser
Chrome
122.0.0.0
Operating system
Windows
10 / 11
Device type
desktop
Desktop, mobile, tablet, bot, or unknown.
Engine
Blink
Rendering engine estimate.
Bot hint
None detected
Heuristic bot detection.
Confidence
High
Based on matched UA fields.
User agent length
111
Characters in the raw user agent.
Copy raw user agent
Copy the original user agent string for logs, support tickets, or debugging.
Copy parsed summary
Copy readable browser, OS, device, engine, bot, and confidence details.
Privacy note
User agent parsing is designed to happen locally in your browser without external APIs.
Accuracy note
User agents can be spoofed, frozen, reduced, or incomplete. Detection is not perfect.
Debugging note
Useful for HTTP logs, support tickets, analytics, compatibility checks, and bot review.
Browser privacy note
Modern browsers may reduce user-agent detail to limit fingerprinting.
Parsed user agent details
Review browser, OS, device, engine, bot, and raw string details.
Browser details
Chrome 122.0.0.0
Operating system details
Windows 10 / 11
Device details
desktop
Engine details
Blink
Bot / crawler details
None detected
Architecture
64-bit
Platform hints
Windows architecture token present
Raw string details
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36
User agent examples
Click an example to populate the detector.
User agent quick reference
Browser
Application making the request.
Operating system
Platform reported by the UA string.
Device type
Desktop, mobile, tablet, bot, or unknown.
Engine
Rendering engine such as Blink, WebKit, Gecko, or Trident.
Bot detection
Heuristic and not guaranteed.
UA reduction
Modern browsers may limit detail.
Spoofing
User agents can be faked.
Client Hints
Modern alternative for some browser/device info.
Developer guide
Understand user agent strings and their limits
User agent detection helps interpret logs and support cases, but it should not be treated as guaranteed truth.
What is a User Agent Detector?
A User Agent Detector parses a user agent string to estimate the browser, operating system, device type, rendering engine, and crawler status.
What is a user agent string?
A user agent string is text sent by browsers, crawlers, apps, and clients to identify themselves to servers. It appears in HTTP request headers, analytics logs, support tickets, and debugging tools.
When should developers use one?
Use it for debugging browser compatibility issues, reading server logs, investigating support tickets, understanding analytics traffic, identifying bots, testing responsive behaviour, checking mobile versus desktop requests, and reviewing legacy browser traffic.
User agent detection limitations
User agents can be spoofed, reduced, frozen, incomplete, or shared across similar browsers. Bot detection is heuristic, and feature detection is often better for frontend code.
User agent detection vs feature detection
User agent detection guesses browser or device from a string. Feature detection checks whether a browser supports a capability. For frontend compatibility, feature detection is often safer.
Privacy and security
BlinkCalc is designed to parse locally in the browser. User agent strings can reveal browser and device details but are not reliable identity and should not be used as authentication or security controls.
Common user agent mistakes
How to use this User Agent Detector
- 1Paste a user agent string into the input box.
- 2Click Parse or use the current browser detection button.
- 3Review the detected browser, OS, device type, engine, and confidence.
- 4Copy the parsed summary if needed for debugging or support.
- 5Treat results as helpful hints, not guaranteed truth.
Why developers use a User Agent Detector
User Agent Detector FAQs
It parses a user agent string and estimates the browser, operating system, device type, rendering engine, and bot status.
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