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File comparison in computing is the automatic comparing of data between files on a file system. The result of comparisons are typically displayed to the user, but can also be used to accomplish tasks in networks, file systems and revision control.

Examples of programs that complete the task include diff and cmp. The ability to highlight the changes to a document or file are found in text editors and word processors. __TOC__ For a detailed comparison of features, see comparison of file comparison tools.

Free software


A few free software implementations:

Proprietary software


Examples of proprietary file comparison utilities include:

Freeware

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Beyond Compare v3.1.9: Beyond Compare is an advanced folder and file comparison tool. http://bit.ly/55UO3e
chip_downloads (Download Chip Asia) Sat, 19 Dec 2009 12:01:14 -0000
Beyond Compare v3.1.9: Beyond Compare is an advanced folder and file comparison tool. http://bit.ly/55UO3e
Check out "Neways Harmonization Index" http://images.neways.com/netsteps/file/Comparison%20report%20at%20company%20level%203%2013%2009.pdf
AdelineHNLiu (Adeline HuiNan Liu) Sat, 19 Dec 2009 10:06:56 -0000
Check out "Neways Harmonization Index" http://images.neways.com/netsteps/file/Comparison%20report%20at%20company%20level%203%2013%2009.pdf
Compare File 0.1 (Freeware): A hex file comparison utility http://bit.ly/4zVICT
abhi_24_88 (abhishek kumar) Fri, 18 Dec 2009 15:57:17 -0000
Compare File 0.1 (Freeware): A hex file comparison utility http://bit.ly/4zVICT
http://www.thestar.com.my/news/story.asp?file=/2009/12/16/nation/20091216180233&sec=nation UK MPs are positively boring by comparison
blackdqen (Emily Cheah Su Lyn) Wed, 16 Dec 2009 17:43:05 -0000
http://www.thestar.com.my/news/story.asp?file=/2009/12/16/nation/20091216180233&sec=nation UK MPs are positively boring by comparison
Saksi ahlinya gemeteran. Hanya menjelasksn prosedur ambil file di voice recorder? Kirain metode voice comparison-nya.
arifwidi (Arif Widianto) Tue, 15 Dec 2009 07:57:54 -0000
Saksi ahlinya gemeteran. Hanya menjelasksn prosedur ambil file di voice recorder? Kirain metode voice comparison-nya.
http://is.gd/5m9Ft Diff Doc-English Only: Document comparison tool. Any file type. Fast
hotlib_download (hotlib.com) Sun, 13 Dec 2009 23:07:15 -0000
http://is.gd/5m9Ft Diff Doc-English Only: Document comparison tool. Any file type. Fast

 
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1-2-3 Synchronize and Backup - An easy tool for synchronizing and backing up files and folders.
Meta Description: [ An easy tool for synchronizing and backing up files and folders ]

Advanced CheckSum Verifier - Verify the integrity of files, by using the CRC32 or MD5 checksum calculation algorithms. Checksums may be used for revealing the damaged files or compare two files for identity. [Windows 95/98/Me/NT/2000/XP].
Meta Description: [ Check integrity of your files content with MD5 checksum hash algorithm, using Advanced Check Sum Verifier - MD5 and SFV calculation utility software for Windows. Download ACSV now and verify quality of burning your CD-R and CD-RW for future. ]

404 Complite File Comparison Family - True word-by-word comparison utilities for programming language source, ASCII text and data files. Native versions available for OS/2, Windows NT, and DOS.
Meta Description: [ COMPLITE(tm) and COMPSIB(tm) File Comparison Utilities for Programming Language Source. COMPTFUZ(tm) fuzzy number compare. Windows, OS/2, DOS ]

ComponentSoftware - CSDiff : text, HTML, or MSWord file difference analysis tool, for Windows 95/98/NT. HtmlDiff : online CGI program to compare any two text files on the Web. Each free.
Meta Description: [ ComponentSoftware provides version control and configuration management solutions for Windows (GNU RCS and GNU CVS Compatible). In addition we supply a wide range of file comparison tools which are used to compare text, HTML, XML, Excel and Word documents. ]

Darwin Open Systems - Including Java diff source code, idiff, mgdiff, and spiff Unix tar.gz downloads.

DateWise FileCompare - Patented comparison technique that automatically recognizes a file with embedded tokens, and reporting differences between the files and embedded tokens separately. The utility is available in both EBCDIC and ASCII versions for almost every platform.
Meta Description: [ DateWise's patented FileCompare matches files with embedded tokens without detailed file specifications (such as bindary compiled executables with embedded timestamps) ]

Diasoft Corp. - File Replication Pro, is a secure TCP/IP based replication solution, automatic real-time or scheduled replication across LANs, WANs, Internet and firewalls. [Win 95/98/ME/NT/2000/UNIX/LINUX/MAC]
Meta Description: [ File Replication Pro - your solution for file replication, file synchronization, and file backup. Download a 30 day trial and get support. ]

File SyncForce - Perform file synchronization between PCs, laptops, hard drives, and client and server networks. Automatically detect which files have changed within a given directory and synchronize those changes to a destination directory, and log the files that have been synchronized.
Meta Description: [ File SyncForce, Object Explorer, and Intelligen are great utilities for Powerbuilder (global search and replace) and File Syncronization. ]

fsum - Free file checksum generation and verification utility. Supports .MD5 and .SFV file formats.
Meta Description: [ fsum - File Integrity Checker ... md5sum,md5summer,sfv,sfv checker,sfv creator,.md5,.sfv,free,freeware,fast,fastest,quick,quickest,md5sum,sfv,generate,generator,generation,generating,create,creator,creation,check,checker,checking,verify,verifier,verification,verifying,valid,validate,val... ]

Generic Diff Format - Specification of GDIFF, a generic file format for representing the differences between two files, from Marimba to the W3C.

Guiffy Software - Shareware text file compare/smart-merge tool with a 1.2 Java/Swing GUI. For all Java-enabled platforms.
Meta Description: [ Guiffy Software is the producer of Guiffy, the Advanced Cross-Platform Diff/Merge tool. Our diff tool supports over 150 file encoding formats including Uniocde and MBCS. Advanced features include tuneable inline diff highlighting and a blend of 3 diff algorithms. Our 3-way merge tool, SureMerge,... ]

KDiff3 - Compares and merges 2 or 3 files or directories. The file diff shows changes within each line. For Unix and for Windows. Source available under GPL.

One-on-One - Utility to compare one folder or volume with another supports both MAC and PCs.
Meta Description: [ OneonOne allows you to compare one folder or volume with another. It is most useful if you desire to have one folder mirror another. ]

404 Patrick Pecatte Software - Shareware and freeware for file management, synchronization, backup of Windows and Macintosh files stored on NT. French, English, Portuguese version.
Meta Description: [ Software utilities, file and content management with functions like file synchronization, Macintosh file management for Windows platforms, automation of file purge, metadata extraction Office, OpenOffice.org, StarOffice documents, photo database,prepresss solutions ]

SoftInterface, Inc. - WordDocDiff compares two MSWord/Text files side by side. Complements FindInFilesX and CompareFilesX.
Meta Description: [ Free Trial. Easy to use. Document comparison and document conversion software tools of the most popular file types is a Softinterface specialty. ]

Unison - File synchronization tool that allows two replicas of a collection of files. Directories to be stored on different hosts (or different disks on the same host), modified separately, and then brought up to date by propagating the changes in each replica to the other. [Unix / Windows]

Visual Comparer - Fast compare and merge utility for text files. Strict lexical and syntax highlight. The full-function text editor adapted under ideology of line comparing of files.
Meta Description: [ Visual Comparer - text file compare and merge tool. Visual Comparer allows you to load the text files for compare, matching, merging operations. ]

Wtkdiff - Weak tkdiff, or Wayne's tkdiff, an attempt at a minimal version of John Klassa's tkdiff processor. Tcl/Tk source code.

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