About Subtitle Time Shifter & Audio Sync
Fix out-of-sync subtitles with millisecond precision. Shift all cue timestamps earlier or later to perfectly match video dialog, intro logos, or frame rate drift.
Key Capabilities & Features
- Positive and negative millisecond time shifting
- Quick preset buttons (+1s, -1s, +500ms, -500ms)
- Prevents negative timestamps at video start
- Works seamlessly with both SRT and WebVTT formats
How to Use Subtitle Time Shifter & Audio Sync
1
Input Subtitle Text
Paste your out-of-sync SRT or VTT subtitle content.
2
Set Time Offset
Enter the offset in milliseconds (positive to delay, negative to advance).
3
Download Resynced File
Download your perfectly aligned subtitle file ready for playback.
Privacy & In-Browser Execution Guarantee
All timestamp math performed locally in your browser memory.
Frequently Asked Questions
How do I know how many milliseconds to shift subtitles?
Play the video and note the exact time the character speaks versus when the subtitle appears. If the subtitle appears 2 seconds too late, shift by -2000 milliseconds.
Related Tools in this Suite
Universal Subtitle Converter (SRT, VTT)
Convert, clean, and validate subtitle files between SubRip (SRT) and WebVTT formats
Subtitle Merger & Bilingual Combiner
Concatenate split subtitle files or create bilingual dual-language subtitles
Media Duration & Playback Speed Calculator
Sum multi-track media segment durations and calculate playback speedup time savings