Free Rainproxy tool

User-Agent Parser

Decode browser, OS, engine, device and bot status instantly. Everything runs privately in your browser.
BrowserOS + deviceBot detection
Live preview
BrowserChrome 126
Operating systemmacOS
DeviceDesktop
READY
User-Agent string
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Need to rotate user-agents at scale?

Rainproxy ships with realistic fingerprint rotation built in. Fresh UA, headers and TLS profiles on every session. Pair it with 75M+ residential IPs and you're indistinguishable from a real user.

See all plans

Want to know what your own machine reports instead? Run the OS detection check to see your operating system, version, device type and CPU architecture.

How it works

Decode any User-Agent in milliseconds

Every UA string is a tiny manifest of browser, engine, OS and device. We parse it client-side so nothing leaves your machine.

Step 1

Paste the string

Drop any UA from your logs, analytics or a real request. Even one you've never seen before.

Step 2

Local regex pipeline

A layered matcher pulls browser, version, engine, OS and device type. Fully in your browser.

Step 3

Bot signature scan

Known crawlers, headless browsers and HTTP clients are flagged so you can separate humans from bots.

Desktop vs mobile vs TV

Reliable device classification. Handy when your analytics is lying or your CDN is splitting traffic.

Headless detection

Catches Puppeteer, Playwright, Selenium, curl, axios and the usual scraping fingerprints.

Privacy-first

No network call. The UA string never leaves the page. Paste production data without worry.