omponentSoftware Diff (CSDiff) is a free advanced file difference analysis tool for Windows. Use it to analyze what changes have been made between two revisions of the same file, folder or archived folder. CSDiff is commonly used to analyze program source files, HTML documents and MS-Word documents.

Features of CSDiff:
Powerful folder and single file comparison tool.
Single screen display provides a unique, intuitive difference analysis, making it ideal for printout and reports.
Edit mode allows to accept, reject or manually edit any modifications.
Change detection by line, by word or by character.
Smart white-space difference analysis option.
Analysis of MS-Word documents. (MS-Word required)
Sophisticated folder difference analysis sorted by any key.
Support of compressed folders (ZIP files) for comparison between archived folders and regular folders.
Enhanced folder difference analysis reports, including: HTML reports, XML reports, filters and optional links to file-level analysis.
Freeware -- CSDiff may be used completely free of charge