SRTGen From $4/mo · Free plan 9.1 Visit Jubler
jubler.org
What it is
Jubler is a free, open-source desktop editor for creating, revising and converting text-based subtitles. It runs on Linux, macOS and Windows and handles more than 20 subtitle formats, including SRT, ASS/SSA, WebVTT, TTML, ITT, DFXP and YouTube subtitles. Users can shift timing, convert frame rates, split or join entries and files, check spelling, and search and replace with regular expressions. A timeline with draggable subtitle blocks supports two-point synchronization. With VLC, Jubler can preview video and frames, show audio waveforms and let users edit subtitles during playback. Quality tools include configurable validation rules and TED guidelines checks. Translation mode supports Azure Translator, and command-line tools are available for batch work and automation. Downloads include builds for Apple Silicon and Intel Macs, Windows, Linux x86_64 and arm64, as well as a generic Java version. VLC is required for video preview and audio waveforms; ASpell is suggested for spell checking. Jubler is licensed under AGPL-3.0.
Spec sheet
- What it does
- Jubler is a free, open-source desktop application for creating, editing, converting and refining text-based subtitles.Read 15 Oct 2026 · jubler.org
- Purpose
- Jubler is a free, open source editor for creating, editing, and converting text-based subtitles.Read 3 Oct 2026 · jubler.org
- Free plan
- YesRead 20 Sep 2026 · jubler.org
- Integrations
- Official integrations include VLC for media preview and ASpell for spell checking.Read 15 Oct 2026 · jubler.org
- Privacy
- Its privacy policy says no user data is collected and no usage information is sent to a service.Read 3 Oct 2026 · jubler.org
- Support
- The contact page directs users to GitHub for issues and support.Read 3 Oct 2026 · jubler.org
- License
- Jubler is licensed under the GNU Affero General Public License version 3.Read 15 Oct 2026 · github.com
- 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.Read 15 Oct 2026 · github.com
- Auto-captioning
- YesRead 20 Sep 2026 · jubler.org
- Automation
- The project provides command-line tools for batch processing and terminal workflows.Read 15 Oct 2026 · jubler.org
- Developer attribution
- The repository copyright identifies Panayotis Katsaloulis and dates the project from 2005.Read 15 Oct 2026 · github.com
- Documentation
- The public 24-page guide covers setup, subtitle creation, customization, exporting, synchronization and translation.Read 15 Oct 2026 · jubler.readthedocs.io
- 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.Read 15 Oct 2026 · jubler.org
- Editing
- Editing tools include time shifting, frame rate conversion, splitting and joining entries or files, spell checking, and regular expression find and replace.Read 3 Oct 2026 · jubler.org
- Editing tools
- Editing includes time shifting, frame-rate conversion, splitting and joining, spell checking, regular-expression replacement, undo and redo.Read 15 Oct 2026 · jubler.org
- Encoding support
- The editor detects encodings on load and supports UTF-8, UTF-16 and legacy code pages.Read 15 Oct 2026 · github.com
- External tools
- Configurable recipes can run command-line tools such as Whisper, faster-whisper and whisper.cpp on subtitles, audio or video.Read 15 Oct 2026 · jubler.org
- Formats
- The homepage lists support for more than 20 subtitle formats, including SRT, ASS/SSA, WebVTT, TTML, ITT, DFXP, and YouTube subtitles.Read 3 Oct 2026 · jubler.org
- Funding
- The official site says the project relies exclusively on donations for continued existence.Read 15 Oct 2026 · jubler.org
- Limit: SourceForge usability
- Two SourceForge reviewers struggled to learn the many options and asked for a clearer manual or starting guidance.Read 15 Oct 2026 · sourceforge.net
- Limit: third-party dependencies
- Softpedia notes that some operations require separately installed applications such as the media player and spell checker.Read 15 Oct 2026 · softpedia.com
- Limit: VideoHelp language support
- One VideoHelp reviewer reports that missing diacritic support made the software unusable for their language work.Read 15 Oct 2026 · videohelp.com
- 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.Read 3 Oct 2026 · jubler.org
- Platform support
- The project officially supports Windows, macOS and Linux.Read 15 Oct 2026 · jubler.org
- Praise: Softpedia assessment
- Softpedia highlights the organized interface, preview-based synchronization and broad subtitle-format support.Read 15 Oct 2026 · softpedia.com
- Praise: SourceForge users
- SourceForge reviewers describe the Mac version as powerful, polished and stable, and another reviewer calls the program nicely working.Read 15 Oct 2026 · sourceforge.net
- Praise: VideoHelp users
- VideoHelp reviewers praise ease of use, flexibility, multi-format output, Unicode handling and value for money.Read 15 Oct 2026 · videohelp.com
- Preview
- Jubler provides VLC-based video and frame preview, audio waveform visualization, and real-time subtitle editing during playback.Read 3 Oct 2026 · jubler.org
- Preview requirement
- The download page says VLC is required for video preview and audio waveform; ASpell is suggested for spell checking.Read 3 Oct 2026 · jubler.org
- Quality checks
- Jubler offers configurable quality validation rules and TED guidelines compliance checking.Read 3 Oct 2026 · jubler.org
- Quality control
- Quality validation uses configurable rules and includes TED-guideline checking.Read 15 Oct 2026 · jubler.org
- Rating on Softpedia
- 3.8 out of 5 from 19 reviews.Read 15 Oct 2026 · softpedia.com
- Rating on Software Informer
- 3.5 out of 5 from 11 reviews.Read 15 Oct 2026 · jubler.software.informer.com
- Rating on SourceForge
- 3.5 out of 5 from 4 reviews.Read 15 Oct 2026 · sourceforge.net
- Rating on VideoHelp
- 9 out of 10 from 2 reviews with numeric overall scores shown.Read 15 Oct 2026 · videohelp.com
- Security signal
- Windows code signing is provided free by SignPath.io with a certificate from SignPath Foundation.Read 15 Oct 2026 · jubler.org
- Source availability
- Source code, build files, tests, packaging and command-line tools are publicly available in the GitHub repository.Read 15 Oct 2026 · github.com
- SRT export
- YesRead 20 Sep 2026 · jubler.org
- Styling
- Character- and paragraph-level styling is available for formats that support it.Read 15 Oct 2026 · github.com
- Subtitle formats
- The current project supports more than 20 formats, including SRT, ASS/SSA, WebVTT, MicroDVD, SubViewer, MPL2, TTML, DFXP, ITT and YouTube subtitles.Read 15 Oct 2026 · jubler.org
- System requirements
- The official download page requires VLC for video and waveform features and suggests ASpell for spell checking.Read 15 Oct 2026 · jubler.org
- Timeline
- Its interactive timeline has draggable subtitle blocks and two-point synchronization.Read 3 Oct 2026 · jubler.org
- Timeline editing
- An interactive timeline lets users drag subtitle blocks and synchronize using two points.Read 15 Oct 2026 · jubler.org
- Translation
- Translation mode supports parent and child subtitle editors, with Azure Translator support for machine translation.Read 15 Oct 2026 · jubler.org
- Video preview
- Video, frame and audio-waveform preview are provided through VLC/libvlc in the 10.0 release.Read 15 Oct 2026 · jubler.org
- VTT export
- YesRead 20 Sep 2026 · jubler.org
Plans and prices
Free Free Free; the project relies exclusively on donations. Desktop subtitle editor · VLC required for video preview and audio waveform · Generic Java version does not support embedded preview Read 3 Oct 2026 · jubler.org
Free Free Desktop subtitle editing · 20+ formats · video/audio preview · translation · command-line tools Read 15 Oct 2026 · jubler.org
Strong points and limits
Strong points
- Supports more than 20 subtitle formats.
- Timeline offers draggable blocks and two-point synchronization.
- Command-line tools support batch processing.
- No user data or usage information is sent.
Limits
- VLC is required for video preview and waveforms.
- Generic Java version lacks embedded preview.
- ASpell is suggested for spell checking.
Who it suits
Jubler suits subtitle editors who want a free desktop tool with format conversion, timing controls and batch automation. It also fits users who need Linux support or a generic Java version.
Jubler in depth
Read the full write-up
Overview
Jubler is an open-source desktop editor for creating, editing, and converting text-based subtitles. It is a strong fit for editors who want precise timing controls and repeatable batch workflows across Linux, macOS, or Windows. Its breadth makes it more capable than a basic subtitle utility, though the richer media-preview workflow depends on VLC.
Key features
Jubler handles more than 20 subtitle formats, including SRT, ASS/SSA, WebVTT, TTML, ITT, DFXP, and YouTube subtitles, with SRT and VTT export. That flexibility helps when projects move between delivery requirements; it is especially useful for editors maintaining multiple versions of a subtitle file.
Timing and organization tools include time shifting, frame-rate conversion, splitting and joining entries or files, plus an interactive timeline with draggable subtitle blocks and two-point synchronization. Together they suit detailed alignment work better than quick text-only corrections. Spell checking and regular-expression find and replace provide practical cleanup tools for recurring terms and larger edits; ASpell is suggested for spell checking.
Automatic captioning and translation mode with Azure Translator support widen Jubler beyond manual subtitle editing. Configurable quality rules and TED guidelines compliance checking help review subtitles before delivery. Command-line tools support batch processing and automation, a meaningful advantage for repeat workflows, though less relevant to occasional one-file edits.
Video and frame preview, audio waveform visualization, and real-time subtitle editing during playback rely on VLC. The generic Java version does not support embedded preview, so users choosing that build should expect a more limited review workflow. Jubler is licensed under AGPL-3.0, its privacy policy says it collects no user data or usage information, and GitHub is the channel for issues and support.
Pricing
Free: free. The desktop subtitle editor is free, and the project relies exclusively on donations. This suits individual editors and teams able to use the software under its AGPL-3.0 license; there is no paid tier to add features or support. VLC is required for video preview and audio waveform features, while the generic Java build omits embedded preview.
Platforms
Jubler runs on Linux, macOS, and Windows. Downloads include macOS builds for Apple Silicon and Intel, Linux builds for x86_64 and arm64, Windows, and a generic Java version. VLC is required for video preview and audio waveform features, so users who need those tools should account for that dependency when choosing a build.
Who it's for
Jubler is best for subtitle editors who value format coverage, detailed timing adjustments, validation, and command-line batch work without a subscription. Its automation and multi-format support can justify learning a full desktop editor for recurring projects. It is less suited to users who want a self-contained preview setup without VLC or a web-based captioning workflow.
Pros and cons
Pro: More than 20 formats plus SRT and VTT export make it adaptable across subtitle workflows.
Pro: Timeline synchronization, timing conversion, validation rules, and TED guideline checks support careful editing and review.
Pro: Command-line batch tools help automate repeat processing without subscription costs.
Con: VLC is required for video preview and audio waveforms, adding a dependency for the full media-review workflow.
Con: The generic Java build has no embedded preview, limiting its appeal to users who want those features in that build.
Con: Support is directed through GitHub, which may not suit users seeking a dedicated support channel.
Alternatives
Subtitle Software is a useful starting point for comparing options across the category.
Choose Editsub if a web option matters: it runs on Linux, macOS, Windows, and the web, with a free tier capped at 10 subtitle files and a Pro plan at $48 a year with 1,500 credits per month.
SRTGen is a web and API option with a free tier that includes SRT, VTT, and TXT export, a five-minute screen-recording limit, and 2 GB of storage.
Subtitle Edit is another free, open-source subtitle editor for Windows, macOS, and Linux; consider it if you want a cross-platform alternative.
VideoLocalize is an API and web alternative with a free tier and a free trial.
EZTitles is a Windows-only paid option with a free trial; choose it if you want to evaluate a paid desktop alternative.
Aegisub is another free, open-source editor for Linux, macOS, and Windows, and merits comparison if you want a different desktop option.
Checksub is a paid API, browser-extension, and web option with a free trial; its Junior plan costs $18 a month.
Zubtitle is a web, iOS, and Android alternative. Its free Bootstrapper plan is limited to two videos per month, adds a watermark, and caps resolution at 720p.
Verdict
Choose Jubler if you need a free desktop toolkit for precise subtitle editing, format conversion, quality checks, and repeatable batch work. Its strongest case is the combination of deep editing controls and automation without a subscription; look elsewhere if VLC-dependent preview or a desktop-only workflow does not fit your needs.
Verdict
Jubler offers a broad set of subtitle editing, validation and automation tools at no listed cost. Video preview and waveform features require VLC, and the generic Java build does not include embedded preview.
Where Specifiction places it
- Subtitle tools#4 of 318.9
- Subtitle Software#5 of 318.6
