Fsum for Windows

Name: Fsum
Rating: 4.2 (13 reviews)
Author: SlavaSoft

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Used Fsum for Windows?

Editors’ Review

Download.com staffFebruary 26, 2026

Fsum is a free, fast, and easy-to-use command-line utility for generating and verifying multiple file checksums. It checks file integrity and detects corruption effectively.

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Pros
- Supports numerous popular hash algorithms
- Fast processing speed
- Recurses through directories
- Handles large file sizes
- Supports standard .MD5 and .SFV formats
Cons
- Command-line interface only
- No graphical user interface

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Full Specifications

GENERAL

Release: January 15, 2008

Latest update: February 26, 2026

Version: 2.52

OPERATING SYSTEMS

Platform: Windows

Operating System

Windows XP
Windows 10
Windows 98
Windows ME
Windows 2000
Windows NT
Windows 95

Additional Requirements: Windows 95/98/Me/NT/2000/XP

POPULARITY

Total Downloads: 85,915

Downloads Last Week: 13

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User Reviews

4.2/5

13 User Votes

Fast command line checksum utility
yonianNovember 17, 2009
Pros
Fast. Command line - no sluggish GUI to suck up resources (and crush your soul).
Cons
Microsoft doesn't include it with Windows.
Summary
Does all kinds of checksums - I like tiger. Microsoft 'fc' was part of DOS 1.0 and is still part of W7, but it always was slow. Copy fsum.exe to %windir%\system32. Winkey-R 'cmd' fsum -tiger file1 file2 or fsum -tiger [wildcard] Much faster than 'fc file1 file2' or "fc [wildcard]'
Have had it but never knew how to use it.
Willard MickelsonJanuary 19, 2008
Pros
I have had Fsum on my PC for years now; but, I've never taken the time to find out what it's supposed to do. So; my review is rather useless.
Cons
As with other software; it is beyond my mental capacity to understand many of their functions, how they process and what other programs they associate with. I am 57 years old retired living on disability and realizing why my parents never took their new VCR out of the box when we gave it to them. Past 50, one seems to tire of learning new complicated applications.
Summary
Very good utility.
berserk666July 15, 2007
Pros
There is a windows GUI here: sourceforge.net/project/showfiles.php?group_id=192266<p>You can use this GUI to calculate the hashes, check SFV and MD5, generate SFV and MD5, add the hash at the end of the file name.
Cons
It's a command line utility. A beginner need a gui.
Summary
Excellent tool
marco_of_smegNovember 27, 2006
Pros
Very small, fast and does not need installing. <p>There is a Windows GUI for this. <p>Type FSUM GUI into Google and it is at the top.
Cons
Summary
It's OK.
hartzenenJanuary 23, 2006
Pros
- It's simple and works.
Cons
- It can't check directly files in other folders. You have to pass the path as an argument. <p>- It doesn't have a GUI.
Summary
Usefull, all options that we need, but interface is in DOS mode
plionkeJune 3, 2005
Pros
Supports 12 formats of checksums, large files (up to 5 GB), extended checksum files
Cons
Thought its very usefull, we have to type again cmd in run and work fom there, this is major problem.
Summary
KarmonockiNovember 21, 2004
Pros
Cons
Summary
The Answer to all your needs!
November 14, 2004
Pros
Cons
Summary
I been look for a programs that would give me the digits of a CRC. Most of them require a existing SFV file or only checks archives. This Piece does it all!!!
A must have utilty
October 26, 2004
Pros
Cons
Summary
No GUI. Other than that is excelent
I like it
July 11, 2004
Pros
Cons
Summary
It's a very effective utilty, but it's not for beginers. Would be nice to see some GUI in it.

Developer’s Description

By SlavaSoft

Perform file checksums generation and verification.

Free command line utility for file multi-checksum generation and verification. Most common use: checking files for corruption. A hash/checksum calculation might be performed on data before transferring(downloading/uploading) it from one location to another. Making the same calculation after the transfer (download/upload) and comparing the former and latter results, you can check if the received data is corrupted or not.

Fsum allows to create/verify most popular file hashes (message digests) and checksums: MD2, MD4, MD5, SHA-1, SHA-2 (256,384,512), RIPEMD-160, PANAMA, TIGER, CRC-32, and the hash used in eDonkey (ed2k)/eMule tools; Very fast and easy to use. Recurses directories, works with large size files, supports .MD5 and .SFV file formats (automatically recognizes the format when verifying). Checks the integrity of data files notifying about any bad, incorrect or missing file. Compatible with: md5sum, MD5Summer, Easy SFV/MD5 Creator, SFV Checker/Verifier, WinSFV, Win CRC32. Version 2.52 fixes minor bugs.

Fsum for Windows

Editors’ Review

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Cons

Fsum for Windows

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User Reviews

Fast command line checksum utility

Have had it but never knew how to use it.

Very good utility.

Excellent tool

It's OK.

Usefull, all options that we need, but interface is in DOS mode

The Answer to all your needs!

A must have utilty

I like it

Developer’s Description