VTT Sync Tool — WowCast

WowCast ◆ VTT Sync Tool

1 M3U8 Source

Master m3u8 URL (S3)

2 VTT Subtitle Files

📄

Drop .vtt files here
or click to select

3 Sync Offset (Δt)

s = ms

Positive → delays | Negative → advances

4 Generate & Publish

M3U8

Not loaded

VTT files

0

Delta-T

0 ms

Preview Player

▶ Enter an m3u8 URL and click "Load & Validate"

Output Log