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Sync Subtitles Instantly with the SRT Time-Shifter
Frustrated by subtitles that don’t match the audio? Our free SRT Time-Shifter is a high-performance utility designed to fix sync issues in seconds. Whether your subtitles are lagging or appearing too early, our tool allows you to shift every timestamp in your .srt file with millisecond precision. Best of all, the processing happens 100% locally in your browser, ensuring your files never leave your computer.
How to Sync Subtitles
- 01. Upload SRT: Select or drag your .srt file into the tool area.
- 02. Adjust Offset: Use the slider or manual input to set the time shift (e.g., +2.000s).
- 03. Process Locally: Our engine recalculates all timestamps instantly in your browser.
- 04. Download File: Save your newly synced subtitle file to your device immediately.
Frequently Asked Questions
Is my subtitle file uploaded to your server?
No. This tool uses client-side JavaScript APIs to process your file. Your data stays on your local machine and is never transmitted to an external server.
How do I fix subtitles that appear too early?
If subtitles appear before the audio, use a positive (+) offset. For example, setting it to +1.500s will delay every line by one and a half seconds.
Can I shift subtitles backwards if they are lagging?
Yes. If subtitles appear after the audio, use a negative (-) offset. This will “speed up” the timestamps so they appear earlier.
Does this tool support VTT or ASS formats?
Currently, this specific tool is optimized for the SubRip (.srt) format, which is the most common subtitle standard for video players.
What is the maximum time shift allowed?
The slider allows for a ±10 second shift, but you can manually type any value into the millisecond field for larger adjustments.
Will the formatting (bold/italic) in my SRT be lost?
No. The tool only identifies and modifies the timestamp strings. All text content and HTML-style formatting tags within the file remain untouched.