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Subtitle Converter & Time Shifter

Convert between SRT and VTT, shift every timestamp by ± seconds, and clean up formatting — runs locally, no upload on server.

  • Runs in your browser
  • No upload on server
  • Free, forever
  1. Enter value
  2. Pick units
  3. Copy result

VTT output· 2 cues

WEBVTT

00:00:01.000 --> 00:00:04.000
Welcome to Bluebird.

00:00:04.500 --> 00:00:07.200
Everything runs in your browser.
How this works
  • Both SRT and VTT are auto-detected — paste either, pick the target format, and you get back the other.
  • The time shift slider adds or subtracts seconds from every cue, ideal when captions are a few seconds out of sync.
  • Files are parsed and rebuilt in your browser. Nothing is uploaded, nothing is logged.

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