About

Aegisub is a free, powerful, and customizable cross-platform open-source subtitle editor, renowned for its comprehensive support of multiple formats, real-time video preview, and a robust Lua scripting module that facilitates accurate timing, visual typesetting, and translation. Its feature set includes spell checking, dark mode, and auto formatting, all while prioritizing user privacy, portability, and offline functionality without requiring registration or tracking. While its precise founding year is not explicitly stated, its origins are noted to be around 2005, and after a period of perceived inactivity, active maintenance and development have recently resumed on GitHub. Aegisub holds a strong market position as a leading open-source solution, reportedly used in the industry by entities such as Crunchyroll, and is often cited as the best FOSS subtitle editor for macOS. It competes with other specialized tools like Subtitle Edit and various commercial alternatives, offering broad compatibility across Mac, Windows, Linux, BSD, Snapcraft, Flathub, and Flatpak platforms.