tools

Subtitle Studio

100% local v1.0.0

Edit subtitle text and timing, shift all cues, and convert between SRT and WebVTT. Files stay in your browser.

Drop a file here

SRTWebVTTUTF-8

Source subtitles

UTF-8 files up to 2 MB and 2,000 cues. Edits existing subtitles; no automatic transcription.

Timeline

Shift all cues (seconds)

Positive offsets delay subtitles; negative offsets show them earlier. A shift that would make any timestamp negative is rejected.

Overlapping cues can be intentional and are warnings. Timing, order, and cue separators are checked; cue settings, styling, and markup are preserved as text, not fully validated.

Edit cues

Times use HH:MM:SS.mmm. Edit the source above and load again to add or remove cues; loading replaces cue edits below.

Output subtitles

Output format

SRT output renumbers cues and omits WebVTT headers, comments, styles, regions, and cue settings. Voice, ruby, class, language, and karaoke timestamp markup stays verbatim; SRT players may not support it.

WebVTT output retains its metadata blocks before the cues. No subtitle text or styling is executed on this page.

About this tool

Open or paste SRT and WebVTT subtitles, edit cue text and timings, shift synchronization, inspect timing issues, and export SRT or VTT. Processing stays in your browser. This tool edits existing subtitles; it does not transcribe audio.

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