Free tool
Shift Subtitles
Subtitles a little ahead or behind the audio? Shift the whole file forward or back by any amount — right in your browser. No signup.
100% in your browser — your files never leave your device.
How to shift subtitles
- Step 1
Add your subtitles
Paste your SRT or VTT, or upload the file — it stays in your browser.
- Step 2
Set the delay
Enter how many seconds to move the subtitles (positive = later, negative = earlier; decimals OK).
- Step 3
Apply & download
Click Shift, then copy or download the re-synced file.
When to use this
- The subtitles are uniformly early or late — shift the whole file by a fixed number of seconds.
- The file matches a different cut of the video (e.g. director's cut vs theatrical) — shift to line it up.
- You just need a quick subtitle delay fix without opening a heavy editor.
FAQ
How do I fix subtitles that are out of sync?
If the subtitles are off by a constant amount, shift the whole file by that many seconds (positive to delay, negative to make them earlier). If the gap grows over time, that's a frame-rate issue — use the FPS converter instead.
Does it keep my SRT/VTT format?
Yes — an SRT stays SRT and a VTT stays VTT; only the timecodes move.
Are my files uploaded?
No. Shifting happens entirely in your browser; nothing is sent to a server.
Need to translate your subtitles too?
Fixing timing and merging is free here. When you need to translate subtitles into another language with the timeline kept perfectly aligned, that's what SubtitleFlow does.
Translate subtitles free