My tools

User-Agent parser

Paste a UA string and the browser, engine, OS and device appear at once — or check whether it is a bot. No button, nothing uploaded.

How to use it

  1. Paste a User-Agent string into the box; the browser, rendering engine, operating system and device appear immediately, with no button to press.
  2. Use Sample to drop in a common desktop Chrome UA and see every field filled in. Anything you paste is read exactly as sent — the input is never rewritten.
  3. Known crawlers (Googlebot, Bingbot, Baiduspider, curl, …) are flagged as a bot, and the device type becomes “Bot” instead of being mistaken for a browser.
  4. Copy JSON to get the same result as a stable, language-neutral object — handy when you paste it into code or a ticket.

Example

User-Agent

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Result

{
  "browser": { "name": "Chrome", "version": "120.0.0.0" },
  "engine": { "name": "Blink", "version": "120.0.0.0" },
  "os": { "name": "Windows", "version": "10" },
  "device": { "type": "desktop", "vendor": null, "model": null },
  "isBot": false,
  "botName": null
}

The browser name, engine and OS stay in English on purpose (they are proper nouns); only the field labels around them are translated. Any field the parser cannot read comes back as “Unknown” rather than a guess.

Rules, limits and known issues

  • Parsing is heuristic, driven by controlled regular expressions — it aims to be correct on mainstream browsers, engines, OSes and devices, and to stay honest on the long tail.
  • Fields that cannot be determined are shown as “Unknown”; no vendor or model is invented. Bots expose no browser or engine.
  • Windows 10 and Windows 11 share the same UA token (Windows NT 10.0), so this tool reports “Windows 10” and cannot tell the two apart from the UA alone.
  • Android model extraction relies on the “Build/” marker; when it is absent the model is “Unknown” rather than guessed.
  • Up to 2,000 characters; above that an error appears instead of a truncated result. Nothing is uploaded, no history is kept, and there is no share link carrying your input.

Once you know the visitor, these are the usual next steps.

HTTP status codes

Timestamp