SRT Subtitle Time Shifter User Guide
Shift every pasted SRT cue by the same number of milliseconds, preserving cue numbers and text. A copy is available only after the complete input validates, entirely in your browser.
How to use
- Paste SRT with cue numbers, timestamps and subtitle text.
- Enter whole milliseconds: positive delays, negative advances. Then shift the subtitle timing.
- Review and download the SRT copy, then verify synchronization in your player.
Formats and limits
- Up to 100,000 UTF-16 code units and 10,000 lines.
- Use HH:MM:SS,mmm with hours 00–99. Additional timestamp settings are unsupported.
- The entire input is rejected if a cue becomes negative, exceeds 99:59:59,999, ends before or at its start, or has an invalid format.
Output
A new UTF-8 SRT copy preserving text, cue numbers and any original BOM, with CRLF line endings.
Frequently asked questions
Will it change cue duration or translate the text?
No. The same milliseconds are added to every start and end. Subtitle text is unchanged; translation and speech recognition are not provided.
The file name and content are only processed in your browser and are not transmitted to the server. The original file will not be overwritten. Please export the required results before leaving the tool.