SRT Timestamp Shifter

Shift all timestamps in a .srt file by a fixed offset. Runs locally in your browser (no uploads).

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Offset (milliseconds)

Clamp negative times

Ready.

Input (paste SRT)

Tip: use a negative offset to shift earlier.

Output

No formatting changes except timestamps.

Parsing notes: looks for lines matching HH:MM:SS,mmm --> HH:MM:SS,mmm. Everything else is preserved verbatim.