ScripterySubtitle Frame Rate Converter
Subtitles that start in sync and drift further off as the video plays are usually made for a different frame rate. Pick the source and target rates to rescale every timing. Runs entirely in your browser.
Runs entirely in your browser — your file is never uploaded, no account, no limits.
How to convert subtitle frame rates
- 1Paste your .srt or .vtt file into the box on the left.
- 2Choose the frame rate the subtitles were made for, then the frame rate of your video file.
- 3Click Convert and download the rescaled file, in the same format you pasted in.
How do I tell drift from a plain offset?
Check the first line and the last. If both are off by the same amount, it is an offset — use the timing shifter. If the gap grows as the video plays, it is a frame rate mismatch, and this tool is the fix.
Which pair should I pick?
25 to 23.976 is the common one: subtitles ripped from a European broadcast played against a film source. 23.976 to 25 is the reverse. If you are unsure, your video player usually reports the file's frame rate in its media information panel.
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Need the transcript, not just the file?
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