Generate realistic, structurally valid browser User-Agent strings in bulk. Chrome, Firefox, Safari, Edge, Android, iOS & more. Used by developers, testers & automation engineers worldwide.
Choose exact parameters when you need precision, or leave fields on random to produce varied, believable batches fast.
Set your parameters and hit
Generate to create user-agents
Select your browser, OS, device type and version strategy. Every field supports a Random mode for maximum variety.
Enter how many user-agents you need — from 1 to 500 at once. Use quick presets for common batch sizes.
All generation happens server-side in PHP. Copy individual strings, copy all at once, or download as a .txt file.
A User-Agent (UA) string is a text identifier sent by your browser in every HTTP request. It tells servers which browser, OS and device you are using. A typical Chrome UA on Windows looks like:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.6367.119 Mobile Safari/537.36Developers and automation engineers use custom user-agents for web scraping, browser emulation, API testing, bot detection research, and load testing across different browser profiles.
Yes. All strings follow the exact format real browsers send. The version numbers are pulled from real browser releases. They are structurally valid and accepted by any HTTP server or parser.
100% free, no account required, no rate limits. It is a free tool by Webnotronics.
Selecting 🎲 Random for any parameter (browser, OS, language, etc.) tells the server to pick a random value from a realistic pool for each generated string, producing maximum variety in your batch.
Yes. Select Android or iOS as the OS, or use Device Type → Mobile. The generator adds the correct device model and Mobile token automatically.
No. All generation logic runs in PHP on the server. Your browser only receives the final JSON result — the algorithm is never exposed to the client.
Up to 500 per request. For larger batches, simply make multiple requests and download each as a .txt file.
Webnotronics builds web scrapers, automation bots, crash-recovery systems and more.