When comparing Online Text Compare vs Kompare, the Slant community recommends Kompare for most people. In the question“What are the best folder/file compare/diff tools for either OSX, Linux or Windows?” Kompare is ranked 19th while Online Text Compare is ranked 22nd. The most important reason people chose Kompare is:
Kompare can create a patch file which lists the differences between two files. Patch files created this way are also compatible with the patch files created by the CLI diff utility.
Specs
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Pros
Pro Unlimited use (No quota)
Pro Online tool
You don't need to install anything on your devices.
Pro Free
Pro Can create patch files
Kompare can create a patch file which lists the differences between two files. Patch files created this way are also compatible with the patch files created by the CLI diff utility.
Pro Supports comparing directories
Kompare can compare both files and directories.
Pro Configurable hotkeys
Because it's a KDE app, all the hotkeys are configurable