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OpenSpeaks Subtitler

Plans and prices

Free

Free

Free and open source; no paid plan or usage limits stated

Every plan, in full

On the record

Authentication
Wikimedia login uses OAuth 2.0, and the tool page says it stores no separate password.meta.wikimedia.org · read 8 Oct 2026
Browser support
The usage instructions recommend modern browsers and say Chromium-based browsers are recommended for full feature support.meta.wikimedia.org · read 8 Oct 2026
Draft generation
Silence detection can split spoken audio into draft subtitle segments, with adjustable silence threshold, minimum silence length, and end buffer.meta.wikimedia.org · read 8 Oct 2026
Editing
The editor includes a waveform timeline, editable subtitle cards, live on-video text, segment looping, and real-time saving to local project state.meta.wikimedia.org · read 8 Oct 2026
File formats
Users can export subtitles as UTF-8 encoded SRT or VTT files.meta.wikimedia.org · read 8 Oct 2026
Intended users
The maker describes archivists, language documenters, and Wikimedians as intended users, especially those working with low-resourced languages.meta.wikimedia.org · read 8 Oct 2026
License
The tool is listed under the MIT license.meta.wikimedia.org · read 8 Oct 2026
Local processing
The tool page identifies FFmpeg.wasm running in a web worker for client-side silence detection.meta.wikimedia.org · read 8 Oct 2026
Planned feature
The tool page lists AI-powered speech-to-text integration as a future feature.meta.wikimedia.org · read 8 Oct 2026
Purpose
OpenSpeaks Subtitler creates and edits subtitles for audio and video, particularly for oral history and language documentation.meta.wikimedia.org · read 8 Oct 2026
SRT export
Yesmeta.wikimedia.org · read 23 Sep 2026
Support
Users can share feedback on the discussion page or file bugs and feature requests in the public GitLab repository.meta.wikimedia.org · read 8 Oct 2026
Translation
The maker says the tool supports a side-by-side translation panel with machine-translation assistance.diff.wikimedia.org · read 8 Oct 2026
VTT export
Yesmeta.wikimedia.org · read 23 Sep 2026
Wikimedia Commons
Users can load media and existing subtitles from Wikimedia Commons and upload finished subtitles there as TimedText.meta.wikimedia.org · read 8 Oct 2026

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