● MEDIA TOOL

Synchronize subtitles

Synchronize subtitle timing online for free. Shift subtitles forward or backward in your browser and download corrected files without uploading them.

✓ フリー ✓ No registration ✓ Processed in your browser

SRTVTTASSSSASBV

01 · FILES

Choose subtitle files

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Drop subtitle files here or click to browse your device SRT · VTT · ASS · SSA · SBV

02 · SYNC

LOCAL

Global delayPositive values move subtitles later; negative values move them earlier.

0 ms

milliseconds

Prevent negative timestampsClamp any shifted start time to 00:00:00 instead of going below zero.

Quick previewThe first few cues update instantly as you change the delay.

Upload a subtitle file to preview its timings.

Choose a subtitle file to begin.

Format support

SRT, VTT, ASS, SSA and SBV timing lines are shifted without changing subtitle text or styling data.

Privacy first

Subtitle contents stay in your browser. No subtitle file is uploaded for synchronization.

Sync tip

Use a positive delay when captions appear too early, and a negative delay when they appear too late.