.MD5 File

The md5 file extension is commonly used for checksum files. The MD5 Message-Digest Algorithm uses a hash function that produces a 128-bit (16-byte) hash value.

This format was used in many programs and is frequently used to check data integrity. It was first designed in 1991 by Ron Rivest.

A typical md5 checksum file is an relatively small file which contains the checksum values of other files. Because the checksum values have fixed length (usually from 16 to 256 bits) the size of checksum file not depend from size of this files, only from their quantity. This allow by small oversizing of summary data let possibility of verifying integrity of data files at any time.

Files with md5 file extension can be primarily found as so call checksum files, a relatively small data files  which contains only the checksum values of other files. Nothing more, nothing less.

How to open:

Some programs can analyze checksum files, but that's about it.

How to convert:

Checksum files cannot be converted to anything else and there is also no reason to do so.