Subtitle Diff Viewer

Compare two subtitle files and inspect every change with a side-by-side diff viewer.

Supports: .srt, .vtt, .ass, .ssa, .sub, .txtMax 2 filesFree Online Tool
Compare subtitle files

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Diff preview

Select two subtitle files to see their differences.

What this tool does

Upload two subtitle files to instantly visualize every change in a side-by-side diff viewer.

Highlights added, removed, and unchanged lines so you can confirm edits before shipping.

Useful for
  • Reviewing subtitle edits between translation or proofreading passes.
  • Checking what changed after running automated cleanup scripts.
  • Comparing multiple subtitle sources to pick the best lines.
  • Providing reviewers with a shareable change log.
Tips

Use split view for side-by-side comparison, or toggle inline mode when screen space is limited.

Normalize files to UTF-8 before comparing to avoid unexpected encoding differences.

Why Choose Our Subtitle Diff Viewer?
  • Free and Online: No software installation required
  • Fast Processing: Quick conversion and processing
  • Multiple Formats: Support for .srt, .vtt, .ass, .ssa, .sub, .txt files
  • Batch Processing: Handle up to 2 files at once
  • Privacy Focused: Your files are processed securely
  • No Registration: Start using immediately
How to Use Subtitle Diff Viewer
  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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