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Mock User-Agent String Generator

Used by developers, writers, and creators worldwide.

A mock user-agent string generator produces realistic browser user-agent headers for testing, mock requests, and sample analytics data. The user-agent string identifies the browser, engine, and operating system behind a request, and code that parses, logs, or branches on it needs a varied set of realistic examples to test against. This tool assembles convincing strings for Chrome, Firefox, Safari, and Edge across common platforms, following the real format each browser uses. Choose how many you want and copy a varied batch. It is ideal for testing user-agent parsing, seeding analytics fixtures, building mock HTTP requests, and checking responsive or browser-specific logic. The strings follow authentic patterns but are generated for testing, so treat them as representative samples rather than a live registry of every real browser version. When precise, up-to-date user-agent values matter, capture real ones from the browsers you actually need to support.

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How to use

  1. Choose your options above
  2. Click Generate
  3. Copy your result

Detailed instructions

  1. Choose how many strings you want.
  2. Click Generate to produce user-agent headers.
  3. Copy a varied batch into your tests.
  4. Use real strings when exact values matter.

Use Cases

  • •Testing user-agent parsing logic
  • •Seeding analytics or log fixtures
  • •Building mock HTTP request headers
  • •Checking browser-specific code paths
  • •Generating varied sample request data

Tips

  • →Test against a varied set of browsers.
  • →Capture real strings for exact values.
  • →Use them to seed analytics fixtures.
  • →Cover both desktop and mobile platforms.

FAQ

what is a user-agent string

A user-agent string is a header a browser sends to identify itself — the browser name and version, the rendering engine, and the operating system. Servers and scripts use it to log traffic, adapt responses, or branch on the client.

are these real user-agent strings

They follow the authentic format each browser uses and are realistic for testing, but they are generated rather than captured from live browsers. For exact, current values, copy real user-agent strings from the specific browsers you need to support.

why test with varied user-agents

Parsing and browser-detection logic often breaks on formats the developer did not anticipate. Testing against a varied set of Chrome, Firefox, Safari, and Edge strings across platforms helps catch those gaps before real users hit them.