🎬 Subtitle Drift Fixer — Two-Point Sync

Subtitles start in sync and slowly slide out of time? That is drift, not an offset — usually a 23.976 vs 25 fps mismatch — and a plain time shift can’t fix it. Give two lines with their correct times (or pick the frame-rate pair) and every timestamp is stretched to match. SRT and WebVTT.

Subtitle file (.srt or .vtt, read locally) …or paste subtitles Correction method

Two sync points

Pick an early and a late subtitle; type when that line is actually spoken in your video (h:mm:ss.mmm or seconds).

Early subtitle …actually spoken at Late subtitle …actually spoken at

Fixed subtitles

Two-point sync fits the straight line new = a × old + b through your two corrections, which fixes both offset and drift at once. If the subtitles jump at a single point (an ad break or a different cut), split the file there and fix each part.