SyncMySubsConvert SRT to SUB
Convert an SRT subtitle to the .sub format. There are two kinds of .sub: MicroDVD, which stores frame numbers and needs a frame rate, and SubViewer, which stores clock times. Pick the one your player wants; the tool labels which it's producing and keeps your text and line breaks intact. It runs in your browser; nothing is uploaded.
Which SUB do you need?
The .sub extension hides two unrelated formats. MicroDVD writes timing as frame numbers like {25}{50}, so it depends on the video's frame rate; it's compact and common with older players. SubViewer writes real clock times and carries a small header. Different players expect different ones.
Choose the variant your player wants. For MicroDVD, set the frame rate to match your video so the frame numbers line up; for SubViewer no rate is needed. The tool keeps your cue text and line breaks and tells you which variant it's writing.
FAQ
MicroDVD or SubViewer, which should I pick?
Match your player. MicroDVD is frame-based and very common with older desktop players; SubViewer is time-based. If you're not sure, try MicroDVD first, and set the frame rate to your video.
Why do I set a frame rate for MicroDVD?
MicroDVD stores frame numbers, not clock times, so the timing is only correct at a specific frame rate. Set it to your video's rate (commonly 23.976, 25, or 29.97) so the subtitles stay in sync. SubViewer stores real times, so it needs no rate.
Is my file uploaded?
No. The conversion runs in your browser. Your file never leaves your device and no server is involved.