SFV Files are Simple File Verification file used to verify data. It’s a program that calculates the checksum of a folder, file or disk used to produce the SFV File. The Ultima purpose is to verify that a particular piece of data is truly the data it’s expected to be.
SFV Files stores CRC32 checksum of files used to verify a file is not corrupted but does not Verify authenticity. They occupy files transferred via CDs, DVDs, USBs, etc.
A CRC32 checksum value is stored in a file that has the SFV File extension appended to it. This checksum changes with each and every character added or removed from a file, the same applies to files and file names within folders of disks.
This implies that the checksum is unique for every single piece of data, even if one character is off, or the size is slightly different or whatever the case maybe. When verifying the files on a disc after they have been burned from a computer, do program doing the verification can check that all the files that were on the disc were successfully transferred to the system.
This is also the same if you are calculating the checksum against a file you have downloaded from the internet. Check the calculated checksum shown on the website and check again after you have downloaded the file.
Both files will match showing that what you downloaded is what you now have on your system, and the file was not corrupted or modified during the process of downloading.
How to run SFV files
Checksum tools allows users to create checksums for a group of files at the same time. The files names and checksums are then saved in an SFV File so that when the files are transferred via CD, DVD, USB drive or any other storage device. Users who receive the files can easily verify that none of the files on the device were corrupted during the transmission process.
There are different tools to run SFV Files. They include: MooSFV, TractionSFV, SFVChecker, TeraCopy, RapidCRC, etc. These are free tools that can generate the checksum of a file or group of files and place it into an SFV File.
RapidCRC for example enables you to create an SFV File foe every single file in your list , or every directory. You can even create one SFV File for all the files.
TeraCopy is a program used to copy data. It can also verify that they were all copied and none of the data dropped along the way. It supports CRC32 hash function, as well as MD5, SHA-1, SHA-256, Whirlpool, Panama, RipeMD and others.
Create an SFV File on MacOs with SuperSFV or Checksum+. Use CheckSFV if you use Linux.QuickSFV works on Windows and Linux. But it works through the command line. E g in Windows with command prompt, enter the following to provide the SFV File;
quicksfv.exe-c test.sfv file.txt
-c makes the file identify the Checksum value of file txt and places it into test.sfv. These commands assume that the QuickSFV program and TXT file are in the same folder.
How to open SFV files
SFV Files are simply plain texts you can view with any text editor like Notepad in Windows, Leafpad for Linux, Geany for MacOs.
Other free text editors also supports the format too eg Notepad++.Some programs that calculates the Checksum can also open SFV Files eg TeraCopy.
But instead of letting you view the plain text information held within as a text editor does, they will open the SFV File and then compare a new Checksum text against the one you have. The file is created like this;
;Generated by WIN-SFV32 v1 (compatible; RapidCRC http://rapidcrc.sourceforge.net );uninstall.exe C31F39B6.
The file name is listed on one line followed by a space, followed by the Checksum. You can add a list of Checksum below using semicolons.
In an SFV checker you can add your files to the program’s file list
Open your SFV file and compare the file’s checksum to those listed in the SFV File, this will enable you verify it’s the files you received/downloaded are identical with the files you used to produce the checksums listed on your SFV file. You just open in a text editor to view the list of filenames and checksum contained in them.
How to convert SFV files
An SFV File is just a text file, you can convert one to another text based formats: eg TXT, RTF, HTML, HTM. They will remain with their SFV file extension because they store the checksum. You cannot save SFV file to formats like MP4, AVI, ISO, ZIP, RAR, etc.
If you can’t still open it after trying these methods, try opening the program with the use of the open menu to browse for the files if you do want your text editor to recognize and automatically.
Open SFV Files in Windows you can change file association .
Some files looks like SFV Files but are not them. Example SFZ, SFM, SIF, SVFIDCAP.SRT files are similar to SFV Files.
SRT files for example are subtitle files so don’t mistake it for SFV file.
Can you safely delete SFV files?
Yes SFV Files are often used for verification purposes or to provide information. They are not required for a program or app to function.
What are SFV files used for?
Used to verify files are not corrupted.
An SFV file cannot guarantee a file is safe or does not contain malware.
This article was first published on November 4, 2022 1:25 p.m. WAT
I am an experienced tech and innovation writer. It’s been 3 years since I started writing at Terecle, covering mostly Consumer electronics and Productivity. In my spare time, I enjoy reading and learning the latest happenings around the tech ecosystem.