Files using the SFV extension are Simple File Verification files, they contain a CRC32 checksum value, and are used to verify the integrity of files. A checksum program is used to calculate the checksum of a file and can produce the output in the form of an SFV file.
A checksum is made by using a hashing function, the output of the hashing function is always the same if the same data is input, but even the slightest difference, a single character being altered, completely changes the output of the checksum. Because of this, checksums can be used to verify that two files are identical, the primary use is for integrity checking files that have been downloaded from the internet. For example, the publisher of a file publishes the checksum alongside their file, the intention is that when a user downloads their file the user can then run a checksum program against it, if the two checksum values match then they know that the files are identical and that the file is likely safe to use.
How can you open SFV files?
Most checksum software can generate SFV files, some can import them to perform the checksum comparison in software rather than requiring the user to compare them manually. SFV files are in plaintext format and can be opened with any text editor. SFV files can be converted to other plaintext file-formats although there isn’t any reason or advantage to doing so.
What programs work with SFV files?
Checksum programs such as MooSVF, RapidCRC, SFV Checker, SuperSFV, MacSFV, Check SFV or checkSum+ can all generate SVF checksum files. TeraCopy, a program designed for file copying can both create SFV files and import them to automate the checksum verification process. Any text editor such as Sublime Text and Notepad++ can open and read SFV files. It is technically possible to convert SFV files to other text-based formats like TXT but there is no benefit to doing so.