GenerateRandomSearch

Error Code Sample Generator

Generates a plausible error code and message pair — for API-documentation examples, error-page mockups or test fixtures. Not tied to any real system's actual error codes.

What it builds, and how many ways

Each result is assembled to this shape: [prefix] + [number] + [description].

  • description: 10 options
  • number: 10 options
  • prefix: 4 options

Taken together those banks can be assembled 400 different ways, repeating after about 25.

Some results it can produce:

  • ERR-8815: Rate limit exceeded
  • E-6173: Unexpected null value
  • APP-ERR-4021: Validation failed
  • SVC-2044: Upstream service unavailable

A fixed sample so this page stays the same between visits. Your own results are assembled at random, each slot filled independently and each press independent of the last, so the same result can come up twice — past the repeat figure above, seeing one twice is more likely than not.

How to use this tool

  1. Press generate for an error code.
  2. Generate again for a different one.

Common use cases

  • API documentation examples
  • Error-page design mockups
  • Test fixtures for error handling

Practical tips

  • Keep codes stable once published; clients will match on them, and changing one silently breaks integrations.
  • Pair every code with a human-readable message. A code alone helps the API author and nobody else.

Each part of the result is chosen independently with your browser's cryptographic random number generator, so every option in a bank is equally likely. How Generate Random works.

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