Side by side
Avidemux vs KDiff3
Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan Open source LinuxMacWeb+1
Visit Avidemux 
Free plan Open source LinuxMacWindows
Choose KDiff3 if you need a free, open-source desktop tool for file and folder comparison or merge conflict resolution. Look elsewhere if syntax highlighting is required.
Visit KDiff3The facts
| Avidemux | KDiff3 | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Yes | Yes |
| Runs on | Linux, Mac, Web, Windows | Linux, Mac, Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 2 | 2 |
| Maker | Not published | Not published |
| Website | avidemux.sourceforge.net | apps.kde.org |
| Best place | #1 on text-to-speech software | #2 on file comparison software |
Avidemux: what it does well
KDiff3: what it does well
- Compares two or three text files or folders.
- Shows differences by line and character.
- Includes automatic merging and a conflict-resolution editor.
- Supports folder comparison and Git integration.
- Handles Unicode, UTF-8, and other encodings.
What to know first
- No free trial is offered.
- Syntax highlighting is not supported.