Random User-Agent Generator - Fake User Agent for Scraping

User-Agent Generator

Generate a random user agent for Chrome, Firefox, Safari, Edge, or filter by device and OS. Useful for headless browser scraping and to scrape without getting blocked.

How to use

1. Choose browser and/or device (desktop, mobile).
2. Click Generate to get a new user agent string.
3. Copy and paste into your scraper or browser.

Why use a user agent generator?

• Rotate user agents to reduce simple fingerprinting.
• Test how sites respond to different browsers.
• Pair with headless browser scraping and best proxies for stable scraping.

When User-Agent matters

Many sites block or throttle requests that send default library User-Agents (e.g. Python-requests/2.28, curl/7.68). Sending a realistic browser User-Agent reduces immediate blocks. It is only one part of browser fingerprinting: headers (Accept, Accept-Language, etc.), TLS fingerprint (JA3), and JavaScript behavior also matter. For strong protection, use a real browser (Playwright/Puppeteer) with our HTTP Header Checker to verify what you send; see Browser Stealth Techniques for Scraping.

Best practices

• Match the rest of the request — Use Accept, Accept-Language, and other headers consistent with the User-Agent; otherwise you may look like a bot. See How Websites Detect Scrapers.
• Rotate with care — For simple scripts, rotating User-Agent can help spread requests; for strict sites, a single consistent browser identity plus residential proxies is often better. Read Scrape Websites Without Getting Blocked.
• Test before scaling — Use our Scraping Test to hit a target URL with the generated User-Agent (and optional proxy) and confirm you’re not challenged.

Desktop vs mobile User-Agents

Sites sometimes serve different content or apply different anti-bot rules for mobile vs desktop. Use our generator to get both and test with Scraping Test. For mobile-first or app-like targets, a mobile User-Agent may be required. Scraping Dynamic Websites with Playwright and Headless Browser Scraping Guide show how to set viewport and UA in a browser.

User-Agent and legal/ethical scraping

Using a descriptive User-Agent (e.g. including your project or company name) helps site owners identify and contact you. It’s recommended in Ethical Web Scraping Best Practices 2025 and Web Scraping Legal Considerations. Rotating to random browser UAs for anonymity is possible but should be balanced with respect for the target site’s terms and robots.txt.

FAQ

Does rotating User-Agent alone prevent blocks? It can reduce simple blocks that only check User-Agent, but many sites use IP, TLS fingerprint, and full browser fingerprint. For strict targets, use a real browser (Playwright) and residential proxies. How Websites Detect Scrapers and Browser Fingerprinting Explained.

Which browser should I pick? Chrome and Firefox are most common; picking one and staying consistent can look more natural than random switches. Use our Scraping Test to try different UAs against your target and see which gets through.

When User-Agent is enough vs when you need more

For many simple sites, switching from a default library User-Agent (e.g. Python-requests/2.x) to a Chrome or Firefox UA from this generator is enough to avoid blocks. For sites with stronger anti-bot (Cloudflare, DataDome, etc.), they also check TLS fingerprint, JavaScript, and other signals. In those cases, use a real browser (Playwright) and Residential Proxies. Start with a generated UA and Scraping Test; if you still get blocked, move to a browser. How Websites Detect Scrapers and Browser Fingerprinting Explained explain the full picture.

Summary

This user agent generator gives you random browser User-Agent strings (Chrome, Firefox, Safari, Edge, desktop or mobile). Use them in your scraper to avoid default library UAs that get blocked. For strict sites, User-Agent is only one part of fingerprinting; use a real browser (Playwright) and Residential Proxies for best results. Test with our Scraping Test.

More resources

• HTTP Header Checker — see full headers and TLS fingerprint.
• Scraping Test — test a URL with your UA and proxy.
• How Websites Detect Scrapers — detection methods.
• Browser Stealth Techniques for Scraping — reduce detection.
• Headless Browser Frameworks — when to use a real browser.

Quick tips

• Prefer one browser family (e.g. Chrome) and keep it consistent for a given project rather than randomizing every request. Consistency can look more natural to simple fingerprint checks.
• Test the generated UA with Scraping Test: paste the UA, hit your target URL, and see if you get 200 and real content. If not, try a different UA or add a residential proxy.
• For sites that check TLS and full fingerprint, a generated UA in requests/curl won’t be enough; use Playwright and our Residential Proxies. See Headless Browser Scraping Guide and Bypass Cloudflare for Web Scraping.

Desktop vs mobile and device-specific UAs

Use the generator to get both desktop and mobile User-Agents. Some sites serve different content or apply different rate limits for mobile. Test with Scraping Test to see if your target responds differently. For mobile-first or app-like experiences, a mobile UA (and optionally a mobile viewport in Playwright) may be necessary. See Scraping Dynamic Websites with Playwright. For production scraping with minimal blocks, combine a consistent UA with Residential Proxies and follow Scrape Websites Without Getting Blocked.

See also

• HTTP Header Checker — see full headers.
• Scraping Test — test URL with UA.
• Browser Fingerprinting Explained — beyond UA.
• Preventing Scraper Fingerprinting — reduce detection.

Copy the generated User-Agent into your scraper’s config or code and re-test with Scraping Test. If the target still blocks, add Residential Proxies or switch to Playwright.

Tip: Keep a small set of UAs (e.g. one Chrome, one Firefox) and rotate between them if you need variety without looking random. For strict sites, consistency plus Residential Proxies and a real browser usually works better than many random UAs. Test each UA with Scraping Test before using it in production.

• Use HTTP Header Checker to see the full set of headers your client sends with this UA.
• For strict sites, combine a consistent UA with Residential Proxies and consider Headless Browser Scraping Guide.

Related reading

• Headless Browser Scraping Guide — when to use a real browser.
• Scrape Without Getting Blocked — tactics and tools.
• Browser Fingerprinting Explained — beyond User-Agent.
• Residential Proxies — combine good headers with clean IPs.

Building a scraper? Read Headless Browser Scraping and Scrape Without Getting Blocked. Need IP rotation? See our Residential Proxies.