Aegisub review
Aegisub delivers advanced timing, typesetting, karaoke, and scripting at no cost.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Aegisub is a free, open-source desktop subtitle editor for creating, timing, translating, styling, and exporting subtitle files. It is aimed at subtitle editors, translators, typesetters, karaoke creators, and video-postproduction users who need detailed control over subtitle timing and presentation. The application supports Windows and macOS, while Linux build instructions are available. Its core workflow combines subtitle timing to audio, real-time video preview, translation assistance, spell checking, thesaurus tools, and multi-format import and export.
There is no paid tier to evaluate: Aegisub is distributed as free and open-source software. Its platform fit is centered on desktop production rather than connected services or browser-based collaboration. Audio waveform and spectrum analysis support synchronization work, while visual typesetting tools provide control over subtitle placement and styling. SRT export is supported, but VTT export is not. Users working across Windows, macOS, and Linux can choose the desktop environment that fits their workflow, with Linux requiring attention to the available build process.
Aegisub stands out when subtitle work depends on timing accuracy, styled subtitles, karaoke effects, translation, or automation through Lua scripting. Autosave, backups, and emergency recovery address continuity during editing, while the real-time preview helps connect subtitle changes with video output. It is a strong fit for specialists who want extensive manual control without subscription costs. Teams seeking automatic captioning, integrations, or VTT-centered workflows should choose a different subtitle tool, as those needs fall outside Aegisub’s stated feature set.
Aegisub pros and cons
- Where it wins
- Audio waveform and spectrum tools support detailed subtitle synchronization.
- Visual typesetting, karaoke effects, and Lua scripting enable advanced workflows.
- Free, open-source desktop app for Windows, macOS, and Linux builds.
- Where it doesn't
- VTT export is not supported.
- Automatic captioning and integrations are outside its stated feature set.
- Linux users need build instructions rather than a listed desktop distribution.
Aegisub fact sheet, pricing and score →
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