.LDF File

The ldf file extension is associated Microsoft SQL, a relational database server, developed by Microsoft. There are many different types of Microsoft SQL severs for different purposes.

Typically ldf files are used by Microsoft SQL server for server logs, which are automatically created and maintained by a server activity performed by it.

How to open:

You can probably view these logs using any text editor.

How to convert:

A direct conversion seems unlikely, but perhaps these logs can be treated as any text editors.