Files - Checksum Calculators (8)

7-Zip is an archive manager that can view and create a wide variety of formats. The program includes folder favorites, optional two-pane view, checksum calculator, file split/combine capability and more. Individual archives can be created with high speed or high compression settings, update options (including update, add/replace, synchronize), split volumes and more. Archives can be secured with standard zip or more secure AES encryption.

Although the official archiver for the open, high-compression "7z" format, the program also supports the creation of multiple formats including ZIP, XZ, BZIP2, GZIP, TAR and WIM. It will extract a long list of other formats, among them RAR, CAB, ISO, ARJ, RPM, VHD, VMDK etc. Even more formats are supported through third-party plugins.

7-Zip Portable is a wrapper from PortableApps.com, auto-detecting 32 or 64-bit automatically. Alternatively, X-7zip is also available.

FreeCommander XE is a powerful dual-pane file manager with hundreds of features including folder size calculation, folder comparison/synchronization, file search, filtering, MD5 calc / verfiy, folder compare, sync and a customizable interface. Includes a file viewer to view files in hex, binary, text or image format; an archive handling ability for standard compressed formats including ZIP (read, write), CAB (read, write) and RAR (read); built-in copy/move/delete handlers; and much more. Additional features are available via plugins.

A 64-bit version is available for donors, while a PortableApps version is also available from the author's website.

muCommander is a skinnable, tabbed file manager with a dual-pane interface. The tool connects to a many online services such as FTP, SFTP, SMB, HTTP, Amazon S3, Bonjour, HDFS (Hadoop), NFS, and more. File copying includes transfer verification, rate of speed controls, and transfer visualization. It can open and create a variety of archive types as well as view and modify ZIP files without recompression. The program can batch rename, change permissions/date, and hash files or folders with a variety of algorithms.

Cross-platform (Mac, Linux, *BSD) and available in 27 languages.

Alternatively, X-muCommander is also available (thanks Danix).

SFV Ninja allows you to check the integrity of any number of files. After running on a file list, the program can then check all files on that list, with the option to only verify/update only newly added files. The program can recursively scan/generate a folder for files and load them all at once, using relative paths whenever possible.

Useful to quickly checking system files or archives for modification/corruption. Supports many commonly-used hashing algorithms listed here from fast/simple to slow/secure: SFV (CRC32), MD5, SHA-1, and SHA-256.