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.
6. Switch to the History tab to revisit previously parsed strings.

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