Adjust subtitle timing, one line or many
Shift all or selected subtitle lines forward or backward. Change start or end times, preview changes and export SRT or VTT.
How to use this tool
- Import subtitles and select the affected lines
- Set the offset and which timestamps to change
- Apply, review warnings and export; undo is available
What to know before processing
Positive values delay subtitles; negative values make them appear earlier. Calculations use integer milliseconds.
Negative or reversed timestamps are rejected. Potentially valid overlaps are only flagged.
This is manual timing correction, not automatic audio alignment. Progressive drift may require separate adjustments.
Subtitle format example
1 00:00:01,000 --> 00:00:04,200 The coast reminds us to slow down.