Shift every subtitle cue into sync.
Move an entire SRT or VTT file earlier or later without editing each timestamp. Cues shifted before zero are safely clipped or removed.
How this tool works
- 01
Choose SRT or VTT
Select the format that matches the subtitle text you are pasting.
- 02
Enter the offset
Use a positive number to delay captions or a negative number to make them appear earlier.
- 03
Download the correction
Review the shifted timestamps, then download the corrected file in its original format.
Practical guide
What to know before you download
Choose the offset from a repeatable sync point
Find a clear word, clap, or sound near the beginning of the video and compare when it is heard with when its caption appears. If the subtitle appears at 00:00:08.0 but the word is spoken at 00:00:06.5, enter -1.5 seconds. Check another point near the end before shifting; if the mismatch grows over time, the problem is drift rather than one constant offset.
Positive and negative shifts
A positive offset delays every cue. Enter +2 when all captions appear two seconds too early. A negative offset makes every cue appear sooner; enter -2 when they are consistently two seconds late. The tool changes start and end times by the same amount, so each cue keeps its original on-screen duration unless it crosses the beginning of the timeline.
What happens before zero
Subtitle timestamps cannot be negative. When a negative shift moves only the start of a cue before 00:00:00, the start is clipped to zero and the remaining portion is kept. A cue whose end also lands at or before zero is removed because it would never appear during playback. Review the opening captions after any large negative adjustment.
A fixed shift cannot repair timing drift
If captions are synchronized at the start but several seconds late by the end, changing every cue by one offset will only move the error. Drift can happen when captions were made for a different frame rate, edit, intro length, or playback speed. Use a subtitle editor that can stretch or retime ranges, or regenerate captions from the exact final video file.
Questions about this tool
How do I make subtitles appear earlier?+
Enter a negative offset. For example, -1.5 moves every cue 1.5 seconds toward the start of the video. Check the first and last few cues before publishing the corrected file.
Does shifting change the caption text?+
No. The tool changes cue timestamps while preserving the visible text and line breaks. For a basic SRT or VTT output, advanced VTT notes, regions, style blocks, identifiers, and cue settings are not retained.
Can I shift both SRT and VTT subtitles?+
Yes. Select the matching input format before running the tool. The result downloads in that same format, using comma milliseconds for SRT and period milliseconds plus a WEBVTT header for VTT.
Why are subtitles still out of sync after shifting?+
A single offset only fixes a constant delay. If the error changes throughout the video, confirm that the captions belong to the same edit and look for frame-rate or playback-speed drift. That requires retiming rather than a fixed shift.