Subtitle Timeline

Edit SRT/WebVTT, sync against local media, shift or correct timings, and export.

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File encoding

Shift all cues (seconds)

Clip negative times to 0; remove cues ending before 0. Undo available.

Two-point drift correction

Source A (s)

Target A (s)

Source B (s)

Target B (s)

Linearly scale every start and end using two matching times.

Export format

Start must precede end; maximum 100 hours. Up to 10,000 text characters, with no blank separator lines.

WebVTT preserves identifiers, cue settings and NOTE/STYLE/REGION; SRT exports time and text only. Native subtitle rendering depends on your browser.

Subtitles and media stay local and are not saved. Undo up to 20 steps, capped at 8 million history characters. Overlapping cues are retained.

0 cues · 0 overlapping prior cuesChoose a subtitle file or create new subtitles.

Choose a subtitle file or create new subtitles.

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Choose media to check synchronization, or scrub the timeline directly.

Preview position · 00:00:00.000

Start (seconds)

End (seconds)

Subtitle text