zsCompare allows you to manually or automatically compare and synchronize Windows or Mac OS X files, folders, zip files, and jar files between local directories or networked computers.
You can also compare the contents of text files line by line, and then merge the files to include only the changes you want. You can also compare text that has been input either by typing it in, or by copying from non-text files such as Word documents, Excel spreadsheets, and PDF files. Finally, zsCompare includes the functionality found in zsDuplicateHunter for free. This functionality allows you to find and remove duplicate files from your computer which saves hard drive space and makes common operations like searches and backups faster.

The key features of zsCompare are described below. For a complete list of features, please visit our website.
Key Folder Comparison Features: Compare and synchronize two folders; Compare and synchronize zip files as if they were part of the regular file system; Create, update, and delete zip and jar files; Save and reload commonly used comparisons for easy reuse; Fine tune the comparison being performed by setting the options used during comparison; Filter the files and/or folders being compared so only essential files are compared; Compare text from Microsoft Word, Microsoft Excel, and Adobe PDFs

Key File Comparison Features: Side by side comparison of text files; Synchronize entire files, sections of files, or individual lines in either direction; Ignore changes in case and whitespace; Results are color coded and the colors can be customized; Easily compare sections of a file that have been moved using freeform text comparison.

Key Duplicate File Finder Features: Find files in a single folder, multiple folders, an entire computer, or multiple computers; Seven different methods of deleting files; Filter files and folders by name to speed up the search and ignore unimportant files; Group files by name size, and/or crc.

Some key features of "zsCompare":

• Compare local directories or networked directories
• Bookmark commonly used directories using Favorites
• Compare by file size
• Compare by last modification date and or creation date with the ability to set tolerances and adjust for daylight savings
• Compare by file attributes (read only, hidden)
• Compare by Checksum including the ability to only do Checksum comparison if file sizes are the same. Two types of checksums calculations are available the CRC32 method and the Adler32 method.
• Compare with fast binary comparison
• Optionally ignore the case of filenames when comparing files and folders
• Optionally ignore hidden and system files when comparing files and folders
• Create and compare snapshots of the file system.
• Create and apply patch files for files. Patch files allow you to store the differences between two files and recreate a file from the original file and the changed file.
• Results are displayed in a hierarchical view which mirrors the structure of your hard drive.
• Modify filenames, timestamps, and attributes directly from the results.
• Sort results according to name, file size, time stamp, or checksum.
• Expand and collapse sub-folders
• Easily compare file contents after completing a folder comparison
• Synchronize all files and folders or selected files and folders in either direction
• The Advanced Synchronization Option for synchronizing directories allows fine-grained control over the synchronization process.
• Copy all files and folders or selected files and folders in either direction
• Permanently delete files and folders without leaving zsCompare
• Open files with the associated editor from zsCompare
• Delete files permanently, or delete to a backup folder
• Filter results according to the relative timestamps of the files.
  File Comparison and File Merge
• Side by side comparison of text files
• Compare text from Microsoft Word Documents and PDF Files.
• Compare files by line, by word, or by character
• Compare files where the order of lines is not important
• Compare files where the order of lines is fixed
• Ignore changes in case
• Ignore changes in white-space (spaces and tabs)
• Optionally compare line breaks within a file.
• Break lines after a specified number of characters or after a regular expression
• View a selected line with differences under the results pane making it easier to determine the differences between long lines of text. You can view both lines as they are shown in the results table and/or the lines combined to show additions and deletions.
• Directly edit the contents of a file (Standard and Professional Editions only).
• Synchronize entire files, sections of files, or individual lines in either direction
• Copy entire files, sections of files, or individual lines in either direction
• Delete entire files, sections of files, or individual lines from either side
• Easily compare sections of a file that have been moved using freeform text comparison
• Display results in binary format to more easily compare binary files
  General Comparison and Synchronization Functionality
• Results are color coded and the colors can be customized
• Difference Navigator to view results at a glance and easily move between differences
• Filter results to show items that have changed, items that have been added, items that have been deleted, and/or items that are unchanged.
• Save commonly used comparisons with sessions
• Save results for historical or reporting purposes
• Search within results to find specific files or lines of text
• Use your standard system dialog to select files and folders, or use our custom dialog which lets you browse within zip files
• Optionally show a warning prompt before a newer file is overwritten by an older file.
• Optionally show a warning prompt before a file is permanently deleted.
  Zip File Management
• Create new Zip files
• Open Zip files and view the contents
• Extract files from a Zip file
• Add files to a Zip file
• Compare Zip files to the original files
• Backup files to a Zip file
• Delete Zip files