Subtitle Time Shift Calculator

Move an SRT file forward by 1.5 seconds.

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Sample inputs
Timing
Offset: 1.5
Unit: Seconds

Subtitles
SRT subtitles:
1
00:00:01,000 --> 00:00:04,000
Caption text

Generated result
Summary: 1 subtitle timestamp row shifted by 1500 ms.

Stats
- Timestamp Rows: 1
- Offset Ms: 1500

Issues
- No issues found.

Output
1
00:00:02,500 --> 00:00:05,500
Caption text

• Offset amount

  Seconds or milliseconds are converted into a single millisecond offset.

• SRT timestamp rows

  Every HH:MM:SS,mmm to HH:MM:SS,mmm row is shifted.

• Forward and backward shifts

  Positive offsets delay captions; negative offsets move them earlier without going below zero.

• File text preservation

  Non-timestamp subtitle text is kept as-is in the output.

• Timing-only scope

  The tool does not fix line length, resync drifting subtitles, or inspect video/audio timing.