Subtitle Timing Shifter

Shift all subtitle timestamps by a specified amount to sync with your video. Free online subtitle synchronization tool.

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

Use positive values to delay subtitles, negative to advance them

Preview

All subtitle timestamps will be shifted by 0 seconds

Select your files
About Subtitle Shifting

The Subtitle Shifter tool allows you to adjust the timing of all subtitles in your file by a fixed amount. This is useful when your subtitles are out of sync with the video - either appearing too early or too late.

Simply specify how much time you want to shift the subtitles:

  • Positive values delay subtitles (make them appear later)
  • Negative values advance subtitles (make them appear earlier)
Supported Formats

This tool supports most common subtitle formats including:

  • SubRip (.srt)
  • WebVTT (.vtt)
  • Advanced SubStation Alpha (.ass)
  • SubStation Alpha (.ssa)
  • SAMI (.smi)
  • MicroDVD (.sub)
  • MPL2 (.mpl)
  • Plain text transcripts (.txt)
How to Use
  1. Upload your subtitle files using the file selector above
  2. Enter the time shift amount (positive to delay, negative to advance)
  3. Choose your preferred time unit (seconds or milliseconds)
  4. Click "Process Files" to apply the time shift
  5. Download your adjusted subtitle files
Tips for Finding the Right Shift Amount
  • Watch a few minutes of your video with the current subtitles
  • Note how many seconds the subtitles are off (early or late)
  • Use that amount as your shift value
  • For fine-tuning, you can use milliseconds for more precision
  • Test with a small portion first before processing all files
Why Choose Our Subtitle Timing 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 Subtitle Timing 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.