User-Agent Generator
PrivacyGenerate and analyze UA strings
- Runs in your browser
- Nothing is sent to a server
- No sign-up
Generador y analizador de User-Agent
Análisis
Navegador
Desconocido
Sistema operativo
Desconocido
Dispositivo
Desktop
Motor
Desconocido
¿Es un bot?
No
User-Agent Generator: Simulate Any Browser
User-Agent is the identification string a browser sends in every HTTP request. It reveals your OS (Windows/Mac/Linux), browser (Chrome/Firefox/Safari), version, and additional data. Our generator creates realistic User-Agents for testing browser detection, mobile-first testing, or bypassing simple restrictions.
We include User-Agents from Chrome, Firefox, Safari, Edge, Opera in current and old versions, and specific bots (Googlebot, Bingbot, curl, wget). Filter by desktop, mobile (Android/iOS), tablet, or specific bot.
For QA of responsive designs, web scrapers, or automated testing (Playwright, Puppeteer). Everything runs in the browser without dependencies.
How does it work?
- Select device type
Desktop (Windows/Mac/Linux), Mobile (Android/iOS), Tablet, or Bot (Googlebot, etc.).
- Filter by browser
Chrome, Firefox, Safari, Edge, or 'any'. Also filter by version (latest, old, specific).
- Copy the User-Agent
You get a realistic string ready to use in curl, fetch(), Playwright, or Postman.
Frequently Asked Questions
Is it legal to change User-Agent?
Yes. It's a common practice for QA testing, web scraping of public data, and privacy (all major browsers have functionality to change it). May violate specific Terms of Service — always review the terms of the service you interact with.
How do I use User-Agent in curl/Node.js?
curl: `curl -A 'Mozilla/5.0 ...' https://example.com`. Node fetch: `fetch(url, { headers: { 'User-Agent': '...' }})`. Playwright: `browser.newContext({ userAgent: '...' })`.
Why do some sites block generic User-Agents?
Sites detect legitimate browsers by fingerprints (headers combination, JavaScript, canvas fingerprint). Changing only User-Agent may fail if the browser doesn't execute JavaScript or has other detectable signals. Use tools like Puppeteer-extra-stealth.