CaptionKit Tools
Subtitle Delay Calculator
Compare matching video and subtitle timestamps to see whether captions need to move earlier or later.
Try it now
Result
Example
Input
Video: 00:10:00 Subtitle: 00:10:03
Output
Subtitle delay: +3 seconds The subtitle appears later than the video.
How to use
- 1Upload a supported file or paste your content.
- 2Choose any options, then start processing.
- 3Review, copy or download the result.
Common errors
Make sure the file is UTF-8 text and every cue has a valid timestamp. Empty or unsupported files cannot be processed.
Frequently asked questions
Are my files uploaded?
No. Local tools process files in your browser and do not send them anywhere.
Does formatting stay intact?
Cue timing and caption text are preserved. Unsupported metadata may be removed during format conversion.