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

Positive values delay subtitles; negative values make them earlier.

Preview

All subtitle timestamps will shift by 0 Seconds.

Select your files
About subtitle shifting

Delay or advance every cue in the file with a single shift value. Perfect for subtitles that are consistently early or late.

Use positive values to delay subtitles (show later) and negative values to make them appear earlier.

Supported formats

Works with SRT, WebVTT, ASS/SSA, SAMI, MicroDVD, MPL2, and plain-text transcripts, handling up to fifty files at once.

How to use
  • Upload your subtitle files
  • Enter the shift amount (positive delays, negative advances)
  • Choose seconds or milliseconds
  • Process the files
  • Download the synced subtitles
Finding the right shift
  • Watch a sample of your video to estimate the offset
  • Use milliseconds for small adjustments
  • Test on a short clip before batch processing
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.

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