User Agent Generator & Parser

This user agent generator builds realistic User Agent strings for any browser, operating system, and device, and parses any UA back into its browser, engine, OS, and device details. Everything runs in your browser, so there is nothing to install and no sign-up.

It is built for web developers, QA testers, SEO specialists, and anyone scraping or debugging who needs an accurate UA string fast. Use Quick Presets for popular setups, the Custom Generator for full control, the Parser to decode any string, and Compare to spot differences between two agents side by side.

Private by design: every UA is generated and parsed locally in JavaScript. No User Agent strings are ever sent to a server, logged, or tracked.

How to Use the User Agent Tool

Start with a Quick Preset

On the Generator tab, click any preset such as Chrome Windows, Safari iOS, or Googlebot. The matching User Agent appears in the result box and is copied to your clipboard instantly.

Or build a custom string

In the Custom Generator, choose a Browser, Version (or keep Latest), Operating System, OS Version, and Device Type, then click Generate. Prefer something realistic but unpredictable? Click Random.

Parse any User Agent

Switch to the Parser tab, paste a string (or click Use Current for your own browser's UA), and click Parse. You get a breakdown of browser, engine, OS, device, and bot status.

Compare or bulk-generate

Use the Compare tab to put two User Agents side by side, with matching and differing fields highlighted. Need many at once? Open the Bulk Generator, set a count up to 10,000, then copy or download the results.

Features

Multi-Browser Support

Generate accurate strings for Chrome, Firefox, Safari, Edge, Opera, and Internet Explorer, each with multiple selectable versions.

Operating System Variations

Pair any browser with Windows, macOS, Linux, Android, or iOS, choosing from real, version-specific platform strings.

Quick Presets

One click copies a popular configuration such as Chrome Windows, Safari iOS, Firefox Windows, Edge, Googlebot, or Bingbot.

Bot User Agents

Grab Googlebot and Bingbot crawler strings to test how search engines see your site, and the parser flags any bot UA.

Detailed Parsing

Decode any UA into browser, rendering engine, OS, device type, device model, vendor, plus is-bot and is-mobile flags.

Side-by-Side Comparison

Compare two User Agents in one table where matching fields stay green and differences turn red, ideal for debugging.

Bulk Generation

Create up to 10,000 random User Agents in one click, optionally filtered by a specific browser or operating system.

Copy & Export

Select individual UAs or all at once, copy them to the clipboard, or download the selection as a TXT or JSON file.

Random Generator

Produce a single realistic but randomized User Agent on demand for quick rotation or spot testing.

Configurable Version Pools

Browser, OS, and device-model lists can be tuned in settings, so generated strings stay current and on-brand.

Frequently Asked Questions

What is a User Agent string?

A User Agent is a line of text your browser sends to every website it visits. It identifies the browser name and version, the operating system, and the device type, for example Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36.

What does a User Agent string contain?

It packs together the browser and its version, the rendering engine (such as Blink, Gecko, or WebKit), the operating system and version, and clues about the device type and model. Paste any string into the Parser to see each of these fields broken out clearly.

How do I generate a random User Agent?

On the Generator tab, click Random to get one realistic UA, or open the Bulk Generator, enter a count up to 10,000, and generate a whole list. You can filter bulk results by a specific browser or operating system before copying or downloading them.

How do I parse or decode a User Agent string?

Switch to the Parser tab, paste the string (or click Use Current to load your own browser's UA), and click Parse. The tool shows the browser, engine, OS, device type, model, vendor, and whether the agent is a bot or mobile device.

Are the generated User Agents realistic?

Yes. The strings follow the exact format real browsers use, with accurate version numbers, platform strings, and engine identifiers. That makes them suitable for testing how a site responds to different browsers and devices.

How do I use a custom User Agent for scraping or testing?

Copy a generated string, then set it as the User-Agent header in your HTTP requests or scraping script. For browser testing, you can also apply a custom UA through your browser's developer tools or a User Agent switcher extension.

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

It is historical. Early sites checked for "Safari" or "Mozilla" to unlock features, so later browsers kept those tokens for compatibility. That is why a Chrome string can still contain "Safari" and nearly every UA starts with "Mozilla/5.0".

Is my data safe when using this tool?

Yes. All generation and parsing happen entirely in your browser with JavaScript. No User Agent strings are uploaded to a server, and there is no tracking, logging, or data collection of any kind.