RootUtils

Subtitle Toolkit

Client-Side Secure

Upload SRT/VTT captions, shift timing, and export adjusted subtitle files on-device.

Subtitle text
Preview
Parsed captions will appear here.
Quick tips
  • Supports SRT and VTT detection automatically.
  • Shift captions forward/backward by editing the offset.
  • Everything runs locally—ideal for confidential transcripts.

Is this tool broken?

Let us know if you found a bug or have a feature request.

Parse, shift, and export subtitles entirely in the browser. Upload SRT/VTT files, adjust timing offsets, and download cleaned captions without sending transcripts anywhere.

  • Detects SRT/VTT automatically and shows preview rows.
  • Shift timestamps forward or backward in milliseconds.
  • Export adjusted captions as a fresh SRT file.

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