User Agent Parser Free Online Tool 2026

Last updated March 22, 2026

What Does the User Agent Parser Do?

The User Agent Parser analyzes user agent strings and extracts structured information: browser name and version, operating system, device type, and rendering engine. It handles the complex, historically inconsistent format of user agent strings accurately, giving you clean data from even the most convoluted strings.

Parsing a Chrome Desktop User Agent

Input:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.6099.109 Safari/537.36

Parsed result:
  Browser:         Chrome 120.0.6099.109
  Browser family:  Chrome
  Major version:   120
  Engine:          Blink (WebKit/537.36)
  OS:              Windows 11 (NT 10.0)
  Architecture:    64-bit (Win64; x64)
  Device type:     Desktop
  Mobile:          No
  Bot:             No

Parsing a Mobile Safari User Agent

Input:
Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.1

Parsed result:
  Browser:         Safari 17.2
  Browser family:  Mobile Safari
  Engine:          WebKit 605.1.15
  OS:              iOS 17.2
  Device:          iPhone
  Device type:     Mobile
  Mobile:          Yes
  Tablet:          No
  Bot:             No

Parsing a Firefox User Agent

Input:
Mozilla/5.0 (Macintosh; Intel Mac OS X 14.2; rv:121.0) Gecko/20100101 Firefox/121.0

Parsed result:
  Browser:         Firefox 121.0
  Browser family:  Firefox
  Major version:   121
  Engine:          Gecko (rv:121.0)
  OS:              macOS 14.2 (Sonoma)
  Architecture:    Intel (x86_64)
  Device type:     Desktop
  Mobile:          No
  Bot:             No

Parsing an Android User Agent

Input:
Mozilla/5.0 (Linux; Android 14; SM-S911B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.6099.144 Mobile Safari/537.36

Parsed result:
  Browser:         Chrome 120.0.6099.144
  Browser family:  Chrome Mobile
  Engine:          Blink
  OS:              Android 14
  Device:          Samsung Galaxy S23 (SM-S911B)
  Manufacturer:    Samsung
  Device type:     Mobile
  Mobile:          Yes
  Bot:             No

Parsing a Bot User Agent

Input:
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)

Parsed result:
  Browser:         Googlebot 2.1
  Browser family:  Googlebot
  Bot:             Yes ⚠
  Bot type:        Search engine crawler
  Owner:           Google
  Info URL:        http://www.google.com/bot.html
  Device type:     Bot
  Mobile:          No

---

Input:
Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)

Parsed result:
  Browser:         Bingbot 2.0
  Bot:             Yes ⚠
  Owner:           Microsoft Bing

Parsing an Edge User Agent

Input:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36 Edg/120.0.0.0

Parsed result:
  Browser:         Microsoft Edge 120.0.0.0
  Browser family:  Edge (Chromium-based)
  Underlying:      Chrome 120 (Blink engine)
  Engine:          Blink
  OS:              Windows 11
  Device type:     Desktop
  Bot:             No

Note: Edge includes Chrome tokens for backward compatibility.
The "Edg/" token (not "Edge/") identifies Chromium-based Edge.

Batch User Agent Parsing

Input (from server access log):
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 ... Chrome/120.0.0.0 Safari/537.36
Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) ... Mobile/15E148 Safari/604.1
Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)
Mozilla/5.0 (Linux; Android 14; Pixel 8) ... Chrome/120.0.6099.144 Mobile Safari/537.36
Mozilla/5.0 (Macintosh; Intel Mac OS X 14_2_1) ... Version/17.2 Safari/605.1.15

Parsed summary:
  Browser       Count  %
  Chrome        2      40%
  Safari        1      20%
  Mobile Safari 1      20%
  Googlebot     1      20%

  Device Type   Count  %
  Desktop       2      40%
  Mobile        2      40%
  Bot           1      20%

  OS            Count  %
  Windows       1      20%
  iOS           1      20%
  Android       1      20%
  macOS         1      20%
  Bot           1      20%

Using Parsed Data in Code

// Node.js with ua-parser-js
import UAParser from 'ua-parser-js';

const ua = 'Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.1';
const parser = new UAParser(ua);
const result = parser.getResult();

console.log(result.browser.name);    // "Mobile Safari"
console.log(result.browser.version); // "17.2"
console.log(result.os.name);         // "iOS"
console.log(result.os.version);      // "17.2"
console.log(result.device.type);     // "mobile"
console.log(result.device.model);    // "iPhone"

// Python with user-agents library
from user_agents import parse

ua_string = 'Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X)...'
ua = parse(ua_string)

print(ua.browser.family)   # Mobile Safari
print(ua.os.family)        # iOS
print(ua.device.family)    # iPhone
print(ua.is_mobile)        # True
print(ua.is_bot)           # False

Rendering Engine Reference

Engine    Browsers                    Identifier in UA
------    --------                    ----------------
Blink     Chrome, Edge, Opera         AppleWebKit/537.36 (KHTML, like Gecko)
WebKit    Safari, iOS browsers        AppleWebKit/605.1.15
Gecko     Firefox                     Gecko/20100101
Trident   IE (legacy)                 Trident/7.0; rv:11.0

Common Use Cases

• Analytics: understanding browser and device distribution of your audience
• Debugging: identifying browser-specific rendering issues from support tickets
• Security: detecting bot traffic and suspicious user agents in access logs
• Personalization: serving mobile-optimized content based on device type
• Testing: verifying that browser detection logic works correctly
• Log analysis: processing thousands of user agents from server access logs