Speed match · free · no signup

Subtitle Speed Adjuster

Stretch or compress cue timing by percent to match playback speed.

In/Out: SRT · VTT

Speed
100% in your browser

From → To Shift (ms) Frame rate → Speed (%) Keep 00:00→00:00 (s) → Two-point sync

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Drop up to 10 subtitle files

SRT · VTT · ASS · SBV · SUB · STL — 100% in your browser, nothing is uploaded

✓ No signup
✓ Nothing uploaded
✓ Free

Playback at 1.25× — captions must follow

When you play video at 1.25× or 1.5×, captions fall behind. Setting the speed to the same percentage rescales every cue so subtitles stay in sync with the faster playback.

Values under 100 slow captions down, values over 100 speed them up — from 1% to 1000%. Everything runs locally in your browser.

All 21 tools → or or try the free SRT ↔ VTT converter