SubShift

Convert subtitles between SRT and VTT, and fix timing that drifts out of sync. Shift everything by a fixed amount, or pin the first and last cue to the right time and let it scale the rest. Drop a file, fix it, download.

Subtitle file

Drop a .srt or .vtt file

or click to browse, or paste the subtitle text below

Subtitle text

Output format

Shift all timings

Adds a fixed offset to every cue. Negatives move subtitles earlier.

Two-point sync

Correct time for the first cue

Correct time for the last cue

Fill both to scale every timestamp linearly between them. When active, this overrides the shift above. Accepts HH:MM:SS,mmm, HH:MM:SS.mmm, or plain seconds.

Preview

Subtitle text and cue contents are preserved exactly; only the timestamps change. Cue identifiers and per-cue VTT settings are kept; standalone WEBVTT STYLE/NOTE/REGION blocks are not carried over.