Subtitle Timing Adjuster

Shift every SRT or WebVTT cue earlier or later by a fixed number of seconds without changing its duration.

When to use this tool

• Shift every SRT or WebVTT cue earlier or later by a fixed number of seconds without changing its duration.

How to use

1. Open a UTF-8 subtitle file or paste its contents.
2. Enter seconds: positive delays subtitles, negative makes them earlier. Up to three decimal places.
3. Apply the shift, inspect all results and download the same subtitle format.

Examples

Input: 00:00:01,250 --> 00:00:03,500; +1.250 s

Result: 00:00:02,500 --> 00:00:04,750

Before you start

• Subtitle contents stay in this browser. No upload or account. UTF-8 only, maximum 2 MiB per file or pasted input. Save legacy-encoded files as UTF-8 first; malformed encoding is rejected. WebVTT input requires nondecreasing start times; equal starts and overlapping cues are allowed.
• Positive = later; negative = earlier. Fixed offset only, not drift/FPS repair. Negative starts reject the entire shift. WebVTT inline karaoke timestamps are unsupported and rejected. Settings, notes and styling remain unchanged.

Frequently asked questions