Picute

Subtitle FPS converter

Subtitles that start in sync and drift further off as the video plays were often timed for a different frame rate, for example 25 fps PAL instead of 23.976 fps film. Enter both rates to re-time the file. What you paste or upload stays in your browser.

Convert your subtitle frame rate

How to use it

  1. Paste the subtitles, or upload a .srt or .vtt file.
  2. In From (fps), enter the frame rate the subtitles were timed for, and in To (fps) your video's frame rate. The fields start at 25 and 23.976 and suggest common rates from 23.976 to 60.
  3. Click Convert, check a line near the end against the video, then download subtitles-fps.srt.

What happens to the times

  • Every start and end time is multiplied by From ÷ To. Going from 25 to 23.976, a subtitle at 1:00:00 moves to about 1:02:34.
  • If the subtitles now drift the other way, the rates were entered the wrong way round. Swap them and convert the original file again.
  • Text and cue order stay the same. The output is SRT, renumbered from 1.
  • If every subtitle is off by the same amount from start to end, the frame rate isn't the cause. Use the subtitle shifter instead.