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Choose SRT or VTT
Select a UTF-8 subtitle file. It stays in your browser.
Video & Audio Tools
Subtitle Timestamp Shifter
Shift every SRT or WebVTT timestamp by one explicit offset without changing cue text.
Loading this local tool…
Data handling
Storage and export controls
- Retention
- The tool's working state is kept only while this page is open. Inputs and results are not saved to persistent storage by Got A Tool.
- Export
- The tool may prepare a result after you run it. It downloads or copies it only when you choose that action.
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How it works
Move every subtitle timestamp by one explicit amount
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Enter the offset
Use seconds, including decimals such as -2.500. The tool does not infer video timing.
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Review and download
Fix blocking timing errors first, then download the shifted file in its original format.
When to use it
Use one offset when every subtitle is early or late by the same amount
A uniform shift fits a subtitle file that is consistently, for example, 1.5 seconds late from the first cue to the last. It does not repair timing drift: if the gap grows as the video plays, the subtitle and video run at different speeds and each cue needs a separate timing adjustment.
Can I move subtitles earlier?
Yes. Enter a negative number of seconds, such as -1.250. If that would make any cue negative, the tool stops and names the timing line instead of clamping it.
Does it repair overlapping subtitles?
No. A uniform shift cannot resolve an existing overlap, so the tool preserves it and reports it for review.
Does it repair timing drift?
No. This tool applies one fixed offset to every cue. Use it only when the same delay is present throughout the file.
Does it change subtitle text or VTT settings?
No. It changes only readable timing values. Cue text, numbering, timing-line settings, and supplied line endings are preserved.
Is my subtitle file uploaded?
No. Reading, shifting, and download occur locally in your browser.
Practical guide
Read the Subtitle preparation checklist
Choose the subtitle format and timing change deliberately, then review the finished cues before you upload a copy.
Open the guide →Keep working
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