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Shift subtitles and convert SRT to VTT

Use a two-cue file to verify a 1.250-second shift and a plain WebVTT conversion.

Published and updated October 29, 2026 · Topicut editorial · synthetic practice data

1. Prepare the example

Enter offset 1.250 seconds. After downloading, open SRT ↔ VTT converter and choose VTT for a separate conversion.

1
00:00:01,000 --> 00:00:03,000
Hello world.

2
00:00:04,000 --> 00:00:06,000
A second line.
Download example input (.txt)

2. Follow the steps

Open subtitle time shifter
  1. Open the subtitle time shifter and paste the two-cue SRT example. Use positive 1.250 to move every caption later.
  2. Run and inspect both cues: the first becomes 00:00:02,250 → 00:00:04,250; the second 00:00:05,250 → 00:00:07,250. Download a new SRT.
  3. Open the SRT ↔ VTT converter, paste that shifted file and select VTT. Expect a WEBVTT header and decimal points in timestamps. Keep the original SRT.
  4. Preview the exported file with your real video at the beginning and end. A uniform offset cannot repair growing drift or different video edits.

3. Compare your result

WEBVTT

1
00:00:02.250 --> 00:00:04.250
Hello world.

2
00:00:05.250 --> 00:00:07.250
A second line.

The plain-text converter rejects styling and unsupported format features. It does not align captions to audio. Do not convert a production styled file without reviewing the original.

Reference

W3C WebVTT specification

The example tests this tool’s stated behavior. The external reference describes the wider format or workflow; it does not certify Topicut.

Continue: Subtitle editing

  • SRT ↔ VTT converter
  • Subtitle time shifter
  • Fix a constant subtitle delay, then check readability
  • SRT vs VTT: convert plain subtitles and check the result
  • SRT subtitles
  • WebVTT
  • Subtitle synchronization

Working on a specific brief? Request a sample to discuss scope and availability. Self-serve video generation remains closed.

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