User Agent Parser

About the User Agent Parser

Parses a user-agent string and identifies the browser, operating system and device type. Leave it blank to parse your own browser's user agent.

How to use

Paste a user-agent string (or leave blank for your own), then click Parse.

Worked example

A Chrome-on-Android UA is identified as Chrome / Android / Mobile.

How to use this calculator

1. Paste the user-agent string into the input box.
2. Run the parser to extract the detected browser, operating system, and device.
3. Review the results and use them to identify the client that sent the request.

Step by step method

1. Start with the full user-agent string exactly as it appears in logs, headers, or browser tools.
2. Submit it to the parser so it can recognize common browser, OS, and device patterns.
3. Read the parsed output to see the browser name, operating system, and device type or model if available.
4. Use the results to help with debugging, analytics, support, or compatibility checks.

Worked example

Suppose you have a user-agent string from a support ticket and want to know what browser, operating system, and device it came from.

1. Paste the user-agent string into the tool.
2. The parser reads the string and matches known identifiers for the browser, OS, and device.
3. Check the returned fields to identify the client details.

Tips and common mistakes

• Use the full user-agent string, not a shortened version, for the best detection.
• If the result looks incomplete, verify that the string was copied exactly and was not altered by formatting.
• Some user-agent strings are generic or outdated, so the device or browser may be reported with limited detail.
• This tool is for identification, not for calculating scores or numeric values.

Frequently asked questions