Aegisub is a free, open-source, cross-platform subtitle editor for crafting and modifying subtitles for video. It supports precise timing, text styling, automation scripts, and real-time video preview.
If you need accurate subtitles for movies, TV, animation, or any video content, Aegisub gives you detailed control over timing (syncing to audio), visual style (fonts, colors, layout), and advanced effects like karaoke text. It’s especially popular in the fansubbing community.
You open a video, use its audio waveform and video preview to place and time subtitle lines, edit text and formatting in an editor grid, and export in subtitle formats (e.g., SSA/ASS, SRT). A powerful scripting system lets you automate repetitive tasks or generate effects.
