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Saor Subtitle Shifter / Resync

Fix out-of-sync subtitles — shift all timings earlier or later and correct frame-rate mismatches. Keeps the original format. Runs in your browser.

Gan teorainn méid comhaidFanann comhaid príobháideachNíl gá le logáil isteachSaor in aisce go deo

Drop a subtitle file (or paste below)

SRT, VTT, SBV, LRC, ASS, SSA, TXT gan teorainn méid comhaid

Brabhsáil comhaid
0s

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.

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Conas a Oibríonn sé

When subtitles run ahead of or behind the audio, you just need to shift their timing. This re-times every cue in your browser, keeping the file format intact.

  1. 1
    You paste or drop a subtitle file
    SRT, VTT, SBV, LRC, or ASS — the format is detected automatically. Nothing is uploaded.
  2. 2
    You set a time shift
    Enter seconds (positive to delay, negative to advance) or use the quick presets. A speed factor also corrects frame-rate mismatches (e.g. 23.976↔25 fps).
  3. 3
    Every cue is re-timed
    Each cue's start and end are adjusted by the offset (and factor), clamped so nothing goes negative.
  4. 4
    You download the synced file
    The result is written back in the same format, ready to use.

Subtitles can contain unreleased dialogue. The re-timing runs entirely on your device — your captions are never uploaded.

Cén fáth ár gceann a úsáid?

Completely free — no hidden costs, ever
No account, email, or login required
Files stay on your device — processing happens in your browser
Works on any device — phone, tablet, desktop
No watermarks on any output
Browser memory limits may apply for very large files

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