Resync SRT, VTT, or ASS Subtitles
Shift timing in whatever subtitle format you have.
Drop a subtitle file (or paste below)
SRT, VTT, SBV, LRC, ASS, SSA, TXT ファイルサイズ制限なし
Positive delays the subtitles (use if they appear too early); negative advances them (if they lag the audio).
💡 Fixes subtitles that are out of sync — shift everything earlier or later, and correct frame-rate mismatches with the speed factor. The format is detected and preserved. Everything runs in your browser.
subtitle formats tips
Works with SRT, WebVTT, SBV, LRC, and ASS — the format is detected and preserved on export.
To also change format, pair this with the Subtitle Converter.
The first-cue preview confirms the new timing before you download.
Everything runs in your browser.
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Also check out…
Fix Subtitles That Appear Too Early
Delay subtitles so they line up with later audio.
Fix Subtitles That Lag the Audio
Advance subtitles that appear after the dialogue.
Fix Frame-Rate Subtitle Drift
Correct subtitles that slowly drift out of sync ov
Resync Subtitles for a Different Cut
Shift subtitles to match a version with a differen