SRT Subtitle Timestamp Shifter

Paste an SRT subtitle file and enter an offset in seconds (positive to delay, negative to advance). Every timestamp shifts by that amount. Fixes the most common subtitle sync problem in seconds.

100% freeNo sign-upRuns in your browserNo upload · data stays private

📖 Read the full SRT Subtitle Timestamp Shifter guide — how it works, examples & FAQ →

How to use this tool

  1. Paste the SRT file content.
  2. Enter an offset in seconds (e.g. 3.5 or -2).
  3. Copy the shifted SRT.

Example

SRT offset +3.5s → all timestamps shifted forward

Why it's private

This tool runs entirely in your browser using JavaScript. Whatever you paste is processed on your own device — it is never uploaded to a server, logged, or stored. Built by Calabi, which also strips AI metadata and C2PA signals from images and video.

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