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Subler vs MKV Muxing Batch GUI: catalog facts
Subler	MKV Muxing Batch GUI
Free Free to download from the project's GitHub releases.	Free Free and open source under the GPL-2.0 licence.
macOS	Windows, Linux
Muxes tracks from MOV, MP4 and MKV into MP4 without re-encoding Creates TX3G and WebVTT subtitles that work on Apple devices	Batch processing of many videos at once Separate options for subtitles, audio, chapters and attachments
macOS only, requires macOS 10.13 or later Outputs MP4 only	Output is MKV only Development has been quiet since early 2024
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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