Subtitle Timing Shifter

About Subtitle Timing Shifter

When you re-encode, trim, or change the frame rate of a video, the subtitle file no longer lines up. The AT USE Subtitle Timing Shifter solves this with a simple offset: enter how many seconds (positive or negative, with millisecond precision) every cue should shift, and the tool rewrites the file with new start and end times. Supports SRT, WebVTT, ASS, and SBV. Optionally limit the shift to a time range, so cues before a chapter mark stay put. Runs entirely in your browser — your transcript never leaves your device.

Common use cases

• Fix subtitles that are 2.5 seconds late after a video re-encode.
• Re-sync subtitles after trimming an intro from the front of a video.
• Shift only the second half of a file when a mid-roll edit was added.
• Match a subtitle file to a re-uploaded version of the same video with a different start frame.
• Quickly preview the effect of a shift before committing to it.

How to use it

1. Drop your subtitle file (SRT, VTT, ASS, or SBV).
2. Enter a shift value in seconds (negative shifts cues earlier).
3. Optionally set a start time so only later cues are shifted.
4. Download the shifted file.

Frequently asked questions