I need a software that can do the following:

  1. Compare two different files
  2. Highlight the differences
  3. Can handle big text files

I have already checked out diffchecker.

My OS is Windows 7.

  • 1
    For what OS should that be? Any price limit when it comes to paid solutions? – Izzy Apr 22 '17 at 12:51
  • @Izzy OS is Windows 7. I updated the question. – Sakib Arifin Aug 17 '17 at 3:50

kdiff3 is my personal favourite:

  • Free, Gratis & Open Source
  • Cross Platform
  • Never had a problem with big text files.

Meld. Cross platform (Win/Linux). I use it to clean hacked WordPress websites. Works on text files at least 128415 lines long



  • It can also compare folders.
  • Has a portable version

TotalCommander (freeware) includes a good file diff feature:


  • And how does it meet the requirements – especially handling big files? – Izzy Aug 17 '17 at 6:12

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