Add the subtitles
SRT or VTT. The output keeps the same format.
Home / Free tools / Subtitle shifter
Free tool · no uploadSubtitle shifter: fix out-of-sync subtitles
Captions showing up early or late? Move every line by the same amount. Use a positive number to make them later and a negative one to make them earlier.
Subtitle shifter
Runs entirely in your browser. Your file is never uploaded.
How it works
Enter the offset
In seconds, like 1.5 or -0.75. Positive means later.
Download
Every cue moves by exactly that amount.
Need the captions in the first place?
Offline Captions makes animated word-by-word captions from your video, on your own device. The free web version does clips up to 5 minutes with SRT, VTT, TXT and MP4 export, no signup. The desktop app does any length and whole batches for $29 once.
More free tools: all subtitle tools.
FAQ
How do I know how much to shift?
Play the video, note when the first line is spoken, and compare it with the first cue's start time. The difference is your offset.
What if subtitles drift more over time?
That is a frame-rate mismatch, not a fixed offset, and a shifter cannot fix it. Re-making the captions from the video fixes it.
Is my file uploaded?
No. It runs in your browser.
Stop renting your captions.
Unlimited videos, offline, no watermark. $39 once, or $29 at the founding price.