What is User Agent Generator & Parser?

A User Agent (UA) is a text string that your browser sends to websites, identifying your browser type, version, operating system, and device. This tool helps you generate custom User Agent strings and analyze existing ones.

Web Developers

Test how your website behaves with different browsers and devices without owning them all

QA Testers

Verify responsive designs and browser-specific features across platforms

SEO Professionals

Check how search engine bots see your website using Googlebot or Bingbot User Agents

Web Scrapers

Generate realistic User Agents to avoid detection and blocking

Privacy-Conscious Users

Understand what information your browser reveals to websites

Table of Contents

1. What is User Agent Generator & Parser?
2. Core Features
3. Privacy First
4. How to Use
5. Advanced Features
6. Frequently Asked Questions

Core Features

This tool offers three main capabilities to work with User Agent strings:

Generate

Create User Agent strings for any combination of browser, operating system, and device type.

Quick presets for popular configurations
Full customization options
Random generation available

Parse

Paste any User Agent string to instantly see what browser, OS, engine, and device it represents.

Detect bot and mobile devices
Extract comprehensive details
Analyze current browser UA

Compare

Put two User Agents side-by-side to highlight differences and debug issues.

Visual difference highlighting
Browser-specific debugging
Mobile vs desktop comparison

Privacy First

This tool runs entirely in your browser with complete privacy protection:

No server requests — All generation and parsing happens locally in JavaScript

No data collection — Your User Agent strings are never sent anywhere
No tracking — We don't log or store any usage data
Complete transparency — All processing happens on your device

How to Use

Generate User Agents

There are two ways to generate User Agent strings:

Quick Presets (Fastest)

Find Presets

Look at preset buttons below the result box

Click Preset

Select Chrome Windows, Safari iOS, Googlebot, etc.

Auto-Copy

User Agent is instantly copied to clipboard

Custom Generator (Full Control)

Select Browser

Choose from Chrome, Firefox, Safari, Edge, or Opera

Choose Version

Pick a specific version or keep "Latest"

Pick Operating System

Select Windows, macOS, Linux, Android, or iOS

Set OS Version

Choose specific OS version if needed

Select Device Type

Choose Desktop, Mobile, or Tablet

Generate & Copy

Click Generate, then Copy to clipboard

Pro tip: Click Random to generate a completely random but realistic User Agent.

Parse User Agents

Switch Tab

Go to Parser tab

Paste or Use Current

Paste UA or click "Use Current"

Parse

Click Parse button

Review Details

View breakdown of all components

The parser automatically detects if the User Agent belongs to a bot (like Googlebot or Bingbot) and displays this with a red badge.

Compare User Agents

Switch Tab

Go to Compare tab

Paste Both UAs

Left and right text areas

Compare

Click Compare button

Review Results

Green = match, Red = differences

Bulk Generation

Need many User Agents at once? Use the Bulk Generator:

Expand Section

Click Bulk Generator

Set Count

Enter 1 to 10,000

Filter (Optional)

By Browser or OS

Export

Copy or Download TXT

Advanced Features

Multi-Browser Support

Generate accurate User Agent strings for all major browsers:

Chrome

Most popular browser with versions for Windows, macOS, Linux, Android, and iOS

Firefox

Mozilla's privacy-focused browser across all platforms

Safari

Apple's browser for macOS and iOS devices

Edge

Microsoft's Chromium-based browser

Opera

Feature-rich alternative browser

Internet Explorer

Legacy browser for testing older websites

Operating System Variations

Each browser can be combined with different operating systems:

Windows — Windows 11, 10, 8.1, 8, 7
macOS — Sequoia, Sonoma, Ventura, Monterey, Big Sur
Linux — Ubuntu, Fedora, Debian, and generic Linux
Android — Versions 10 through 14
iOS — Versions 15 through 18

Bot User Agents

Quick access to search engine crawler User Agents for testing how your website appears to search engines:

Googlebot — Google's web crawler used for indexing
Bingbot — Microsoft Bing's search crawler

Detailed Parsing

The parser extracts comprehensive information from any User Agent:

Component	Description	Example
Browser	Name and version	Chrome 120
Engine	Rendering engine	Blink, Gecko, WebKit
Operating System	OS name and version	Windows 11
Device Type	Desktop, Mobile, or Tablet	Mobile
Device Model	Specific device when available	iPhone 15
Bot Detection	Identifies crawlers and agents	Googlebot

Bulk Generation

Generate up to 10,000 random User Agents in one click with powerful filtering and export options:

Filter by specific browser or operating system
Select individual User Agents or all at once
Copy to clipboard or download as a text file
Perfect for web scraping, load testing, or building User Agent databases

Frequently Asked Questions

What is a User Agent string?

A User Agent string is a line of text that your browser sends to every website you visit. It contains information about your browser name, version, operating system, and device type.

Example:

Real User Agent String

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

Why would I need to generate a fake User Agent?

Common reasons include:

Web development — Testing how your site looks on different browsers without switching devices
SEO analysis — Checking how search engines see your website
Web scraping — Avoiding blocks by rotating User Agents
Privacy — Reducing browser fingerprinting
Content access — Some sites serve different content based on User Agent

Are the generated User Agents realistic?

Yes. This tool generates User Agent strings that match the actual format used by real browsers. The version numbers, platform strings, and engine identifiers are all accurate and up-to-date.

How do I use a generated User Agent in my browser?

You can change your browser's User Agent using:

Browser DevTools — In Chrome/Edge, press F12, click the three dots menu, go to "More tools" > "Network conditions" and set a custom User Agent
Browser Extensions — Install a User Agent switcher extension
Programmatically — Set the User-Agent header in your HTTP requests when web scraping

Can websites detect that I'm using a fake User Agent?

A User Agent alone can be spoofed easily. However, websites may use additional fingerprinting techniques like JavaScript APIs, screen resolution, installed fonts, and WebGL to verify browser identity. For basic testing purposes, changing the User Agent is usually sufficient.

What's the difference between Googlebot and a regular browser User Agent?

Googlebot's User Agent identifies it as a crawler:

Googlebot User Agent

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

Websites often serve different content to bots—for example, showing the full content without paywalls or login prompts. This is why SEO professionals test with bot User Agents.

Why do mobile User Agents include "Safari" even for Chrome?

This is historical. Early websites would check for "Safari" to enable certain features. To maintain compatibility, Chrome and other browsers include "Safari" in their User Agent strings. This is called "User Agent spoofing" and dates back to the browser wars.

Is my data safe when using this tool?

Absolutely. This tool runs entirely in your browser using JavaScript. No User Agent strings are sent to any server. There's no tracking, no logging, and no data collection of any kind.

Can I generate User Agents for older browser versions?

Yes. The custom generator includes multiple version options for each browser, including older versions. This is useful for testing backward compatibility or accessing websites that block newer browsers.