Subtitle Time Shifter
Shift every SRT subtitle cue forward or backward by a precise number of milliseconds. intro
How to use Subtitle Time Shifter
- Choose an SRT subtitle file that you are authorized to edit.
- Enter a positive offset for later captions or a negative offset for earlier captions.
- Review the preview and download the shifted SRT.
Example use
Use this tool with your own values. For subtitle time shifter, verify the output and read its limitations before relying on it.
Why use this tool?
Use this free browser utility when you need a focused result without installing desktop software or creating an account. The workspace is designed for a single task, with the input, controls and output kept together.
Privacy, compatibility and limitations
Only standard SRT cue timestamps are shifted; negative times are clamped to zero. This does not correct subtitle drift caused by different frame rates. Processed text stays in the current browser session.
Questions about Subtitle Time Shifter
Will this fix subtitles drifting progressively?
No. A constant offset fixes a global timing shift but not timing drift over the movie.
Does the file upload to a server?
No. The JavaScript reads the selected text file locally in your browser.
