.IBD File

The ibd file extension is used by InnoDB, which is the default storage engine of MySQL since version 5.5.

By default, all InnoDB tables and indexes are stored in the system tablespace.

As an alternative, InnoDB table and its indexes can be saved individually in its own file. This feature is called “multiple tablespaces” because each table that is created when this setting is in effect has its own tablespace.

With multiple tablespaces enabled, InnoDB stores each newly created table in its own tbl_name.ibd file in the appropriate database folder.

Compressed backup of this file has the ibz file extension instead. 

How to open:

There is no reason to open ibd file type for MySQL users.

How to convert:

The *.ibd file type cannot be converted to other file formats. You can get or access data from MySQL server database using some SQL database client software like Navicat and backup or export data using this tool.