Free Tool

User-Agent Generator & Fingerprint Test

The user-agent generator creates realistic browser user-agent strings for scraping, QA, browser profiles, and automation testing. Developers and anti-detection teams filter by browser, operating system, and device type, then receive fresh strings and fingerprint context that help align request headers with expected traffic patterns.

Reviewed:

A user agent generator helps choose a realistic browser header, but it should not be treated as the whole session identity. If the header says modern Chrome on Windows, the rest of the browser profile, fingerprint, and behavior should be consistent with that choice. Use the generated user agent as one part of a test setup, not as the only layer of traffic masking.

Run the result against the exact browser, device, proxy protocol, and target country you plan to use in production. A clean result here is not a ranking promise, but it catches the configuration mistakes that usually create blocked sessions, wrong geo signals, DNS leaks, or inconsistent fingerprints.

For repeat workflows, record the visible IP, ASN, DNS route, latency, and warning state before and after each proxy change. That gives QA, scraping, SEO, ads, and account teams a comparable baseline instead of relying on a single one-off check.

When troubleshooting a blocked session or unexpected platform response, work through the stack in order: confirm the port is reachable, verify the exit IP and ASN, check DNS resolver, inspect request headers, and then compare browser fingerprint and timezone. Skipping layers leads to misdiagnosis — a timeout at the port level looks similar to a cookie checkpoint at the application layer but the fix is completely different.

Mobile proxy workflows behave differently from datacenter ones because CGNAT means multiple physical users share the same outbound IP range. Platforms treat these IPs with higher inherent trust, but that trust can erode if the same session triggers unusual behavior like very high request rates, mismatched timezones, or browser fingerprints that do not match a real mobile device. Use these diagnostic tools to verify the whole configuration, not just the IP.

Generate realistic browser user-agent strings for web scraping, automation, and testing. Check how unique your browser fingerprint is.

User-Agent Generator

Browser

Operating System

Device Type

Your Browser Fingerprint

Even the best user-agent can't hide a datacenter IP

Anti-bot systems check IP reputation first. Use real 4G/5G mobile proxies from Proxy Poland to look like a genuine mobile user — not a server in a rack.

User-Agents, Fingerprints & Proxy Rotation

What is a user-agent and why it matters for scraping

A user-agent (UA) is a string your browser sends with every HTTP request to identify itself. It tells the server your browser name, version, operating system, and device type. Web scrapers and automation tools that send a default or missing user-agent are immediately flagged as bots. Rotating through realistic, modern user-agents is the first step to blending in with real traffic and avoiding blocks.

How websites detect bots via fingerprinting

Beyond the user-agent header, websites collect dozens of browser attributes to build a unique fingerprint: screen resolution, installed fonts, WebGL renderer, canvas hash, timezone, language, hardware concurrency, and more. Even with a well-matched user-agent, an inconsistent fingerprint (e.g., a Chrome UA on Linux with an iOS screen size) triggers anti-bot systems. Advanced detection services like DataDome, PerimeterX, and Cloudflare cross-reference these signals in real time.

Common user-agent mistakes to avoid

Stale UA strings are the easiest mistake to spot — sending Chrome 90 when current is 125+ immediately signals automation. Equally problematic: using the same UA for every request, mismatching the UA with correlated headers like sec-ch-ua, and letting headless browser signatures (HeadlessChrome) slip through uncleaned. Any one of these gets flagged by anti-bot systems. A solid rotation strategy keeps 50+ current UAs and pairs each with a matching, self-consistent header set.

Why combining UA rotation with mobile proxies works best

A well-matched user-agent string is useless if the IP behind it belongs to a datacenter. Anti-bot systems check IP reputation first. Polish mobile proxies from Proxy Poland run on genuine LTE 4G/5G SIM cards and produce IPs that align with real carrier traffic patterns. Combine that with proper UA rotation and consistent fingerprint management, and you get a much harder target for detection systems on platforms like Google, Meta, Amazon, and TikTok.