Aegisub
Aegisub is a cross-platform subtitle editor for creating, timing, styling, and refining subtitle files with video and audio tools.
What is Aegisub?
Aegisub is an advanced subtitle editor for creating and modifying subtitle files on Mac and other desktop platforms. It is designed for subtitle authors, translators, typesetters, and video editors who need precise control over dialogue timing, styling, and on-screen placement. The app helps users sync subtitles to audio, preview subtitle work alongside video, and edit subtitle text in formats commonly used for fansubs and production workflows. It also includes tools for visual typesetting, style editing, spell checking, translation assistance, and automation features for repetitive subtitle tasks. Aegisub is especially useful when working with ASS and SSA subtitles that need more than plain text captions, such as karaoke effects, custom positioning, and detailed formatting.
Key features
- Create and edit subtitle scripts with line-by-line timing control
- Sync subtitles to audio with waveform-based timing tools
- Preview subtitle styling against video while you work
- Apply advanced ASS and SSA styling, positioning, and typesetting
- Use spell checking and translation assistance during subtitle editing
- Adjust timing in bulk with shifting and post-processing tools
- Collect and manage fonts needed for styled subtitle projects
- Automate repetitive subtitle tasks with scripting and templates
Review app leftovers with diCleaner
Inspect caches, support files, containers, and login items before cleaning.
Safety overview
Status: Mostly safe
Aegisub is a legitimate subtitle editing tool and its file access is consistent with that purpose. Users typically open local video, audio, subtitle, and font files, so the app may handle project content you care about. Keep backups of important subtitle projects before large timing or style changes, especially when using automation features or batch edits. If you no longer use Aegisub, removing it is generally low risk aside from losing its settings and project-related convenience files.
Recommendation: Keep Aegisub if you create, edit, time, or style subtitles on your Mac. If you no longer work with subtitle files, you can remove it without affecting macOS, though you may also want to delete its leftover support files later if you want to free a small amount of space.
Common paths
/Applications/Aegisub.app~/Library/Application Support/Aegisub
Support paths
~/Library/Application Support/Aegisub
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