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Jubler
What it is
Jubler is a free, open-source desktop editor for creating, editing, and converting text-based subtitles. It runs on Linux, macOS, and Windows and supports more than 20 subtitle formats, including SRT, ASS/SSA, WebVTT, TTML, ITT, DFXP, and YouTube subtitles. It can export SRT and VTT files. Editing tools include shifting timings, converting frame rates, splitting or joining entries and files, spell checking, and regular-expression find and replace. A timeline with draggable subtitle blocks supports two-point synchronization. With VLC, Jubler can preview video and frames, display audio waveforms, and let users edit subtitles during playback. Other tools include configurable quality checks, TED guidelines checking, Azure Translator support, and command-line batch processing. Downloads include builds for Apple Silicon and Intel Macs, Windows, Linux x86_64 and arm64, and a generic Java version. VLC is required for video preview and waveforms; ASpell is suggested for spell checking. The project is licensed under AGPL-3.0.
For and against
For
- Supports more than 20 subtitle formats.
- Exports SRT and VTT.
- Includes a draggable subtitle timeline.
- Offers command-line batch processing.
- No user data is collected, per its privacy policy.
Against
- VLC is required for video preview and audio waveforms.
- Generic Java version lacks embedded preview.
- ASpell is only suggested for spell checking.
The verdict
Jubler combines subtitle editing, format conversion, playback preview, and batch tools in a free desktop package. Note the VLC requirement for preview features and the generic Java version's lack of embedded preview.
Who it suits
Jubler suits people who need to create or revise subtitles across multiple formats and desktop platforms. Its timeline, playback preview, and batch tools may help both individual editors and those handling multiple files.
Plans and prices
Free
Desktop subtitle editing · 20+ formats · video/audio preview · translation
Read 15 Oct 2026 · jubler.org
On the record
- Architecture
- The current repository is written in C++ with Qt 6 and uses libmpv; Java code is retained on a separate branch from before version 10.0.0.github.com · read 15 Oct 2026
- Auto-captioning
- Yesjubler.org · read 20 Sep 2026
- Automation
- The project provides command-line tools for batch processing and terminal workflows.jubler.org · read 15 Oct 2026
- Developer attribution
- The repository copyright identifies Panayotis Katsaloulis and dates the project from 2005.github.com · read 15 Oct 2026
- Documentation
- The public 24-page guide covers setup, subtitle creation, customization, exporting, synchronization and translation.jubler.readthedocs.io · read 15 Oct 2026
- Downloads
- Version 10.0.0 binaries are offered for Apple Silicon and Intel macOS, Windows, Linux x86_64 and arm64, plus a generic Java build.jubler.org · read 15 Oct 2026
- Editing
- Editing tools include time shifting, frame rate conversion, splitting and joining entries or files, spell checking, and regular expression find and replace.jubler.org · read 3 Oct 2026
- Editing tools
- Editing includes time shifting, frame-rate conversion, splitting and joining, spell checking, regular-expression replacement, undo and redo.jubler.org · read 15 Oct 2026
- Encoding support
- The editor detects encodings on load and supports UTF-8, UTF-16 and legacy code pages.github.com · read 15 Oct 2026
- External tools
- Configurable recipes can run command-line tools such as Whisper, faster-whisper and whisper.cpp on subtitles, audio or video.jubler.org · read 15 Oct 2026
- Formats
- The homepage lists support for more than 20 subtitle formats, including SRT, ASS/SSA, WebVTT, TTML, ITT, DFXP, and YouTube subtitles.jubler.org · read 3 Oct 2026
- Funding
- The official site says the project relies exclusively on donations for continued existence.jubler.org · read 15 Oct 2026
- Integrations
- Official integrations include VLC for media preview and ASpell for spell checking.jubler.org · read 15 Oct 2026
- License
- Jubler is licensed under the GNU Affero General Public License version 3.github.com · read 15 Oct 2026
- Limit: SourceForge usability
- Two SourceForge reviewers struggled to learn the many options and asked for a clearer manual or starting guidance.sourceforge.net · read 15 Oct 2026
- Limit: third-party dependencies
- Softpedia notes that some operations require separately installed applications such as the media player and spell checker.softpedia.com · read 15 Oct 2026
- Limit: VideoHelp language support
- One VideoHelp reviewer reports that missing diacritic support made the software unusable for their language work.videohelp.com · read 15 Oct 2026
- Platform downloads
- The download page lists macOS builds for Apple Silicon and Intel, Windows, Linux builds for x86_64 and arm64, and a generic Java version.jubler.org · read 3 Oct 2026
