Shift subtitle timings — fix out-of-sync subtitles
Move subtitles earlier or later when they are out of sync. Check a line near the beginning and another near the end before choosing a timing change.
Runs in your browser — your input is not uploaded to ToolsNow.
Negative moves subtitles earlier, positive moves them later.
Try this for a known frame-rate mismatch, where timing drifts over the video.
Your files are processed locally in your browser and are not uploaded to ToolsNow.
Site files and analytics use separate network connections. Ads are off. Privacy & Cookies
Use an offset when subtitles are early or late by the same amount. Gradual drift may be a frame-rate mismatch; cuts or edits can also cause it.
Check timing near the start and end after making a change.
How to use
- Open the subtitle file. Paste the contents or choose an SRT, VTT or SBV file.
- Set Shift by (seconds). If a line appears 2.5 seconds too early, enter 2.5 to move it later. A negative value moves it earlier.
- Check for drift. Leave Frame rate conversion at No change for a constant delay. Try a rate preset only when the timing gap grows through the video.
- Download and play it back. Check several points in the video, including the end. Keep the original so you can try another adjustment.
Questions
Why does one offset not fix the whole video?
The subtitles may be timed to a different playback speed or a different edit. A rate change can help steady drift; an extra scene or an advert needs individual cue editing. Check the result rather than assuming the frame-rate label gives the right direction.
What happens before the start of the video?
Cues moved before zero start at zero instead, keeping their duration. The warning counts affected cues; check for overlapping lines at the beginning.
Can I shift ASS or SSA without losing the layout?
No. This version reads ASS dialogue but writes SRT-style text, even though the download can still be named .ass. Convert to SRT first if losing the styling is acceptable; use a subtitle editor to retain the ASS layout.
Published by ToolsNow. How tools and sources are checked · Report a problem