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gMKVExtractGUI vs CCExtractor: catalog facts
gMKVExtractGUI	CCExtractor
Free Free and released into the public domain under the Unlicense.	Free Free and open source under GPL-2.0.
Windows	Windows, macOS, Linux, Command line
Covers most mkvextract and mkvinfo functions in one window Saves typing long mkvextract command lines	Extracts captions, teletext and subtitles to standard formats De facto open source standard for the task
Needs MKVToolNix installed separately Windows only, built on .NET Framework 4.0	Command-line driven, no graphical interface by default Niche tool aimed at caption workflows
Downloadable app	Downloadable app
Open source	Open source
License: Unlicense	License: GPL-2.0-only
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.