Free browser utility
Subtitle Time Shifter
Enter a positive offset to delay captions or a negative offset to show them earlier. Negative timestamps are clamped to zero.
✓ Local processing✓ No registration✓ No file upload
Loading tool…
Before
00:01:12,000 with a -1500 ms shift
→
After
00:01:10,500
How to use Subtitle Time Shifter
- Paste text or select local files in the tool area.
- Choose any options that match the source data.
- Run the conversion or repair and review the preview.
- Copy the result or download the generated file.
Privacy and local processing
This project performs processing, document generation or calculations in your browser. The page does not include an upload endpoint, analytics script or remote processing API call. Avoid pasting sensitive data into websites you do not control.
Frequently asked questions
Can I use negative offsets?
Yes. Use a negative number to move subtitles earlier.
Does it support both SRT and VTT?
Yes. It detects comma or dot millisecond separators and preserves the format.