Subtitle Resyncer (SRT / VTT)

Shift subtitle timing, fix garbled Arabic (Windows-1256) to UTF-8, and convert SRT ↔ VTT.

100% Client-Side · Zero-Server-Upload · 100% Private

Drop a file here or click to browse

How it works

1Drop a .srt or .vtt file — encoding is detected automatically.
2Enter the offset in milliseconds (negative = earlier).
3Download the resynced UTF-8 subtitles.

Are my files uploaded to a server?

Never. Every tool runs inside your browser using WebAssembly and Web Workers. Your files stay on your device and are wiped from memory as soon as you download the result.

Why does my Arabic subtitle show strange symbols?

Older files are saved in Windows-1256. The tool detects this and re-saves the file as clean UTF-8.