Subtitle Time Shifter - SRT, VTT
Shift SRT/VTT subtitle timing earlier or later. Free, no signup.
Tool Interface
Subtitles (SRT or VTT — auto-detected)
Preview (first cues)
How to use
- Paste SRT or VTT subtitles (or upload a file) — the format is detected automatically.
- Enter how far to move the timings and press Earlier or Later.
- Check the preview of the first cues, then copy or download the shifted file — same format as the input.
- Timings are clamped at zero: cues can never shift before the start of the video.
100% private — shifting runs in your browser. Subtitle files never leave your device.
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About This Tool
Fix Out of Sync Subtitles in Seconds
The Subtitle Shifter moves all timings in an SRT or VTT subtitle file earlier or later by the exact amount you choose. Paste your subtitles or upload a file — the format is detected automatically. Enter the shift in milliseconds, seconds or minutes, press Earlier or Later, and check the preview of the first cues before downloading.
The shifted file keeps the same format as the input. Timings are clamped at zero, so cues can never shift before the start of the video. Shifting runs 100 percent in your browser, so subtitle files never leave your device. The tool is free and needs no signup.
How to Use the Subtitle Shifter
Four steps to synced subtitles.
- Provide your subtitles: Paste SRT or VTT text, upload a file, or click Sample to try it.
- Set the shift: Enter how far to move the timings in milliseconds, seconds or minutes.
- Choose the direction: Press Earlier or Later.
- Preview and save: Check the first cues in the preview, then Copy or Download the shifted file.
When Subtitles Go Out of Sync
- Wrong framerate: Subtitles made for a different framerate drift progressively.
- Delayed audio: A constant offset usually means the whole track just needs shifting.
- Intro differences: Versions with different opening lengths need a fixed shift.
- Clamped at zero: The tool never pushes cues before 00:00:00.000.
Key Features
- Auto format detection: SRT and VTT both accepted.
- Precise shifts: Milliseconds, seconds or minutes, either direction.
- Live preview: Check the first shifted cues before saving.
- Same format out: Download matches your input format.
- Private by design: Everything runs in your browser. Nothing is uploaded.
Frequently Asked Questions (FAQ)
Is the Subtitle Shifter free? Yes. It is completely free with no signup.
Which formats are supported? SRT and VTT. The format is detected automatically.
How precise can the shift be? Down to the millisecond, which covers even small sync errors.
What if my subtitles drift over time? A fixed shift fixes constant offsets. Progressive drift needs resyncing at multiple points.
Are my files uploaded? No. Shifting runs entirely in your browser.
Can cues shift before zero? No. Timings are clamped at zero so nothing goes negative.
More Subtitle Tools
Convert formats with the SRT to VTT Converter, explore the video tools, and try the text tools.