Sync Subtitles — Shift Subtitle Timing

How it works

1. Step 1

   Drop your .srt, .vtt, or .sbv file into the box above.

2. Step 2

   Enter the offset in seconds — positive to delay subtitles, negative to show them earlier — and check the live preview.

3. Step 3

   Hit “Shift subtitles & download” to get the re-synced file in the same format.

Frequently asked questions

How do I sync subtitles that are out of time with the video?

Load your subtitle file above, enter how many seconds the subtitles are early or late (for example 2.5, or -0.75 to shift earlier), and download the corrected file. Every cue is shifted by the same offset with millisecond precision.

How do I know which offset to use?

Find a line you can hear clearly, note when it is spoken in the video, and compare it with the subtitle timestamp. The difference is your offset: positive if subtitles appear too early, negative if they appear too late. The preview under the offset box shows where the first subtitle will move.

Can I shift by fractions of a second?

Yes. Offsets accept up to three decimal places (e.g. 1.250 seconds), so you can adjust timing to the exact millisecond. The quick −1s to +1s buttons make fine-tuning easy.

Which subtitle formats can I sync?

SRT, VTT, and SBV. The corrected file keeps the original format, so an .srt stays .srt and a .vtt stays a valid WebVTT file.

What happens if a subtitle would move before 00:00:00?

Cues that would start before zero are clamped to 00:00:00, and cues that would end before the video starts are removed. The tool tells you if either happened.

Is my file uploaded to your servers?

No. The shift is computed in your browser. Your subtitles never leave your device, and the tool works for any file size, free.