Best Free GUI Diff Tools

xxdiff – graphical file and directory comparator and merge tool

xxdiff is a graphical file and directory comparison and merge tool. It presents two or three files side by side, highlights their differences and lets users interactively choose content for a merged result.

Directory comparisons can be shallow or recursive, while file comparisons can use an external diff engine. This keeps xxdiff focused on visual inspection and merge decisions rather than implementing every comparison algorithm internally.

The project also includes helper scripts that extend xxdiff into repeatable review and file-transformation workflows.

This is free and open source software.

Key Features

  • Compare two files, three files or two directories.
  • Perform shallow or recursive directory comparisons.
  • Highlight changed portions within corresponding lines.
  • Merge files interactively and preview the resulting output before saving it.
  • Provide tools aimed at structured merge reviews and merge policing.
  • Unmerge CVS conflicts from an automatically merged file into two inputs for review.
  • Use external diff programs whose output follows familiar diff formats.
  • Customise behaviour and appearance through a resource file.
  • Remain independent of a particular desktop environment.
  • Integrate with scripts and automated workflows.
  • Include Python helper scripts for building file-transformation workflows around xxdiff.

Website: github.com/blais/xxdiff
Support:
Developer: Martin Blais
License: GNU General Public License v2.0

xxdiff
Click for full size image

xxdiff is written in C++ and Python. Learn C++ with our recommended free books and free tutorials. Learn Python with our recommended free books and free tutorials.


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DiffuseTool for merging and comparing text files
TkDiffGraphical front end to the diff program
objdiffLocal diffing tool for decompilation project
KDiff3Text difference analyzer for up to 3 input files
xxdiffFile and directories comparator and merge tool
RustDiffSemantic JSON and XML diff tool
RCompareFile and directory comparison toolkit
Text CompareCompare old and new text
Image CompareSide-by-side image comparison tool for spotting differences
gapSimple native graphical utility for comparing text files
meld-rsVisual diff and merge tool for comparing files and directories

Read our verdict in the software roundup.


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