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Aegisub
What it is
Aegisub is a free, open-source subtitle editor for Linux, macOS and Windows. It helps users create and modify subtitles, align subtitle timing with audio, and preview edits over video. Its customizable audio interface includes waveform and spectrum views, while visual tools on the video frame let users position, rotate, scale and clip subtitles. The editor imports and exports several subtitle formats, including MPEG-4 Timed Text and MicroDVD, and supports subtitle translation. Editing aids include a translation assistant, spell checking, a thesaurus, syntax highlighting and macros. The Automation module runs Lua scripts for macros and export filters. Aegisub also includes multi-level undo and redo, autosaving, backups and emergency recovery saving. SRT export is available through the Export dialog, though direct saving is blocked when override tags would lose information. It does not create DVD subtitles directly. The optional update checker sends anonymous operating-environment details, including an IP address, if enabled.
For and against
For
- Free and open source
- Waveform and spectrum views for audio timing
- Live video preview during editing
- Lua scripts support macros and export filters
- Autosaving, backups and emergency recovery saving
Against
- Does not create DVD subtitles directly
- Direct SRT saving is blocked when tags risk information loss
- Enabling the update checker sends anonymous environment details
The verdict
Aegisub combines subtitle timing, video preview and editing tools across three desktop platforms. Users needing DVD subtitles directly or simple direct SRT saving should note its stated limits.
Who it suits
Aegisub suits subtitle creators and translators who want audio timing tools and a video preview on Linux, macOS or Windows. It may also suit users who need visual typesetting controls or Lua automation.
Plans and prices
Aegisub
Free, open-source subtitle editor
Read 7 Oct 2026 · aegisub.org
On the record
- Audio timing
- It provides tools for timing subtitles to audio, including a customizable audio interface with waveform and spectrum views.aegisub.org · read 7 Oct 2026
- Automation
- The Automation module supports Lua scripts that provide macros and export filters.aegisub.org · read 7 Oct 2026
- Current release
- The downloads page lists version 3.5.0, released October 4, 2026, with Windows and OS X downloads and a source archive.aegisub.org · read 7 Oct 2026
- Editing aids
- Editing features include spell checking, a thesaurus, a translation assistant, syntax highlighting, and macros.aegisub.org · read 7 Oct 2026
- Limit: DVD subtitles
- Aegisub does not create DVD subtitles directly; its FAQ describes using an external program to convert SSA to VOBSubs.aegisub.org · read 7 Oct 2026
- Limit: SRT export
- Direct saving to SRT is blocked when override tags would cause information loss, though the FAQ describes exporting to SRT through the Export dialog.aegisub.org · read 7 Oct 2026
- Privacy
- The optional update checker sends anonymous operating-environment information, including IP address, Aegisub version, operating system, and interface language; users can avoid this collection by not enabling the checker.aegisub.org · read 7 Oct 2026
- Purpose
- Aegisub is a free, cross-platform open-source tool for creating and modifying subtitles.aegisub.org · read 7 Oct 2026
- Recovery
- Aegisub includes multi-level undo and redo, autosaving, backups, and emergency recovery saving.aegisub.org · read 7 Oct 2026
- SRT export
- Yesaegisub.org · read 20 Sep 2026
- Subtitle formats
- It supports importing and exporting several subtitle formats, including MPEG-4 Timed Text and MicroDVD.aegisub.org · read 7 Oct 2026
- Support
- The FAQ recommends the Aegisub Discord server and IRC channel for Aegisub questions and the bug tracker for bug reports.aegisub.org · read 7 Oct 2026
- Subtitle translation
- Yesaegisub.org · read 20 Sep 2026
- Typesetting
- Users can position, rotate, scale, and clip subtitles with visual tools on the video frame.aegisub.org · read 7 Oct 2026
- Video preview
- Its video mode provides a live preview of subtitles as they are edited.aegisub.org · read 7 Oct 2026
- VTT export
- Noaegisub.org · read 20 Sep 2026
