MySQL Native Driver for PHP data
File type: Various data file
A .mysqli file contains data associated with the MySQL Native Driver for PHP, which PHP uses to work with MySQL databases.
It is a software data file rather than a PHP script or a normal MySQL database export.
File type category:
Various data file
Date updated: October 9, 2026
The MySQL Native Driver for PHP, also known as mysqlnd, is a driver component for the PHP scripting language. PHP, which stands for Hypertext Preprocessor, uses it to communicate with MySQL databases through interfaces such as mysqli. The driver was introduced in PHP version 5.
A .mysqli file stores data used by the driver. The extension does not identify a general-purpose, human-readable document, and the exact contents are intended for the associated software rather than direct editing.
The associated MySQL software is available for Microsoft Windows, Apple macOS and Mac OS X, and Linux or Unix systems. The format is an auxiliary data format and is not a standard SQL dump or general MySQL database exchange format.
There is no normal standalone viewer for a .mysqli file. Use the PHP or MySQL-related software that created or uses the file on Microsoft Windows, Apple macOS or Mac OS X, or Linux/Unix. Opening it directly in a text editor may not display useful information.
No standard converter is available for the .mysqli format. It is intended for use by the MySQL Native Driver for PHP rather than for exchange between applications.
If the required information is stored in a MySQL database, export that database through MySQL or a PHP database application to a suitable format such as SQL or CSV. This exports the database contents, not the .mysqli file itself.
Software applications that handle other tasks involving mysqli files:
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