The GitHub repository (noembryo) contains the most technical details regarding its drag-and-drop interface, encoding conversion (UTF-8/ANSI), and filename cleanup using TheTVDB. 📜 Alternative "Subber" Projects
Most "Subber" tools focus on removing manual work, such as auto-renaming files to match your video.
The OpenSubtitles Blog provides a breakdown of how it uses their API to find and download subtitles automatically.