✳ FREE · NO UPLOAD

Subtitle timing shifter

Move every cue by a fixed offset to fix captions that run consistently early or late. Works on SRT and VTT, and writes back in the same format.

Choose an .srt or .vtt file - it stays on your device, nothing is uploadedShift by (seconds - negative moves captions earlier)

Subtitle files are plain text, so this runs entirely in the page - no upload, no processing engine to load.

Worth knowing

This fixes a constant offset. If captions drift progressively further out, the frame rate differs and a constant shift will not fix it.
Negative offsets stop at zero rather than producing negative timestamps.

Koldflux generates and styles captions as part of its render pipeline.