Aegisub is a free, cross-platform open source tool for creating and modifying subtitles. Aegisub makes it quick and easy to time subtitles to audio, and features many powerful tools for styling them, including a built-in real-time video preview.

Downloads

The latest stable version is 3.1.3, released April 6, 2014

See the changelog for a list of changes.

Platform Install Type Checksum Size
Windows Full Install MD5 | SHA 29MB
Windows Portable Version MD5 | SHA 15MB
OS X 10.7+ Full Install MD5 | SHA 36MB
All Source MD5 | SHA 4MB

Note: Spellchecker dictionaries, x64 builds for Windows, and other versions can be found on the downloads page.

Screenshots

Windows

OS X

Unix

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