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Subtitle Time Shifter

Make subtitles match the video again when they appear too early, too late, or slowly drift out of sync.

Runs in your browser · No uploads

Drag & drop a subtitle file

or

SRT, VTT, ASS, SSA, SBV, TTML, DFXP or LRC, or paste the subtitles below

Your files stay on your device. Nothing is uploaded.

Positive = show later (for example 1.5). Negative = show earlier (for example -2.25).
Use this when the subtitles drift more and more out of sync.
  • Nothing leaves your device
  • No server-imposed size limits
  • No sign-up, no watermark
  • Free

How to sync subtitles

  1. Open your .srt or .vtt file, or paste the subtitles.
  2. Enter how many seconds to move them: a positive number makes them later, a negative number earlier.
  3. Download the fixed file.

Good to know

  • Find the right value by noting when a line is spoken in the video and when its subtitle appears.
  • If subtitles start in sync but drift more and more, the frame rate differs: use the frame rate fix.
  • Subtitles moved to before 0:00 are removed; one that is only partly before 0:00 starts at 0:00.

Frequently asked questions

Can it fix subtitles that drift over time?

Yes, when the drift comes from a frame-rate difference (23.976, 24 and 25 fps). Choose the matching frame rate fix.

Is my file uploaded?

No. Everything happens in your browser.