纯本地私密运行的 Subtitle Timing Synchronizer & Video Sync

Synchronize delayed, early, or drifting subtitle files (SRT, VTT, ASS) with millisecond precision, 2-point linear drift stretching, framerate conversion, and live video overlay preview 100% locally. 100% 浏览器本地处理，无需注册账号，零服务器上传。