mmdbverify

README

MaxMind DB Verifier

This is a utility to verify that a MaxMind DB is valid. The search tree, data section, and metadata are all checked for validity and sanity. If the database cannot be parsed or is otherwise invalid, a short description will be sent to stderr and the utility will exit with a non-zero exit code. If successful, no output will be printed and an exit code of zero will be returned.

Note that this tool may flag a database as invalid even though it is completely parseable. This may happen if there is unexpected data in the data section or metadata that is not well-formed.

Usage

Required:

• -file=[FILENAME] - The path to the database to test.

Copyright and License

This software is Copyright (c) 2015-2025 by MaxMind, Inc.

This is free software, licensed under the Apache License, Version 2.0.

Documentation

Overview

mmdbverify verifies a MaxMind DB file to ensure that is valid.