User-Agent Header Parser

Parse client HTTP User-Agent strings to extract browser name, version, operating system, and device type.

How It Works & Processing Standards

Parse client HTTP User-Agent strings to extract browser name, version, operating system, and device type.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Maximum input length: 100,000 characters

User-Agent Header Parser is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use User-Agent Header Parser

  1. 1
    Paste User-AgentEnter any browser User-Agent header string.
  2. 2
    Read Parsed SpecsView detected browser family, version, OS, and device information.

Common Use Cases

  • Debugging web traffic logs, verifying mobile redirection rules, and fraud detection analytics
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