Subtitle Shifter
Shifts every timestamp in an SRT or VTT subtitle file by a constant offset, or rescales them linearly to fix framerate mismatches (23.976 vs 25 fps), then exports the corrected file.
Runs 100% in your browser — your files never leave your device.
Read the full guide to this tool
Notes
- If subtitles drift gradually out of sync over the film, you need linear rescaling, not a constant shift.
- Everything runs locally in your browser; your files are never uploaded to any server.
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