ToolPouch.ai

Subtitles

Subtitles a few seconds off.

A constant offset is one number to fix; growing drift is a frame-rate mismatch.

Wondershare UniConverterPartner

Need captions generated from the audio?

This site only converts, repairs and shifts subtitle files. To turn speech into subtitles and fine-tune the timing, use Wondershare UniConverter — free to start.

  • Speech to subtitles
  • Adjust text and timing
  • Export the subtitle file
Open Wondershare UniConverter

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Check first

Check these three things first

  • Compare the first cue with the moment the line is actually spoken to get the gap (picture speaks at 12s, subtitle shows at 0s: 12 seconds early).
  • If the gap is constant, a single shift fixes it.
  • If the gap grows later in the video, subtitle and video frame rates differ (often 23.976 vs 25) and the timeline needs rescaling, not shifting.

How to fix

How to fix it

Use Subtitle Time Shift: a positive number delays the subtitles, a negative one makes them appear earlier. Cue count and text stay exactly the same.

Shift the timeline for free

FAQ

Frequently asked questions

Why does it go out of sync?

Commonly after re-editing the video, using a different cut (trailer vs feature), or taking subtitles made for another player.

Is a 0.3 second gap worth fixing?

Depends. Delays under about 200 ms are hard to notice, but if lip-sync looks wrong it is worth fixing, and the tool is precise to 0.1 seconds.