User Agent Parser

Summary

Paste any User-Agent string to instantly extract browser, OS, device type, and rendering engine — all client-side.

How it works

1. Your current User-Agent string is pre-loaded automatically.
2. Paste any custom UA string into the input field.
3. Click "Parse" (or edit the field) to run the client-side parser.
4. Parsed fields — browser, OS, device type, and engine — appear in the results panel.
5. Use the "Copy UA" button to copy the raw string to your clipboard.

Use cases

• Debug browser-detection logic in your web application.
• Verify the UA string sent by a headless browser or web scraper.
• Identify the device type of an unusual traffic source.
• Test UA-sniffing middleware before deploying to production.
• Decode UA strings from server access logs.
• Confirm that a mobile emulator is reporting the correct UA.
• Identify crawlers and bots by their UA signatures.
• Quickly look up the rendering engine behind an unfamiliar browser.

Frequently Asked Questions