Partial Subtitle Shifter

Apply different time shifts to specific ranges of your subtitles for precise synchronization

Supports: .srt, .vtt, .ass, .ssa, .smi, .sub, .mpl, .txtMax 50 filesOutput: SRTFree Online Tool
Tool Options

Partial shifting options

Define multiple time segments inside the tool. Each segment can shift cues by a different amount for frame-accurate syncing.

Select your files
Why use partial shifting

Fix subtitles that drift gradually or contain sections with different sync issues. Define multiple segments and shift each one by a custom amount.

Segment controls
  • Start and end time — mark the range you want to adjust
  • Shift amount — delay (positive) or advance (negative) cues
  • Time unit — choose seconds for coarse changes or milliseconds for precision
Popular use cases
  • Gradual drift in long videos
  • Different timing offsets across chapters
  • Commercial breaks inserted or removed
  • Fine-tuning only the problem scenes
How to apply partial shifts
  • Upload your subtitle file
  • Add a segment with start and end times
  • Enter the shift amount (positive delays, negative advances)
  • Pick the time unit for the segment
  • Add additional segments as required
  • Review the summary of segments
  • Process the file to apply all shifts
  • Download the adjusted subtitles
Tips for precise results
  • Watch the video and note exact timestamps of sync issues
  • Start with broad segments, then refine
  • Avoid overlapping segments unless you want cumulative shifts
  • Use milliseconds for tiny corrections
  • Test on a short portion before batch processing
Why Choose Our Partial Subtitle Shifter?
  • Free and Online: No software installation required
  • Fast Processing: Quick conversion and processing
  • Multiple Formats: Support for .srt, .vtt, .ass, .ssa, .smi, .sub, .mpl, .txt files
  • Batch Processing: Handle up to 50 files at once
  • Privacy Focused: Your files are processed securely
  • No Registration: Start using immediately
How to Use Partial Subtitle Shifter
  1. Upload your subtitle files by dragging and dropping or clicking "Choose Files"
  2. Configure any tool-specific options if available
  3. Click "Process Files" to start the conversion
  4. Download your processed files when ready

The tool supports files up to 50MB for image-based subtitles (.sup, .sub, .idx) and 5MB for text-based formats. Processing usually takes just a few seconds depending on file size and complexity.

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