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Jubler vs Subtitle Composer: catalog facts
Jubler	Subtitle Composer
Free Free and open source under the AGPL-3.0, funded by donations.	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, Linux
Supports more than 20 subtitle formats Video preview, waveform and draggable timeline	Waveform view for precise timing Two subtitles side by side for translation
Text-based subtitles only Translation mode relies on Azure Translator	No macOS build listed Handles text-based subtitles only
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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