Convert SUP to SRT

Convert SUP (DVD/Blu-ray subtitle) files to SRT format using OCR technology.

Supports: .supMax 10 filesOutput: SRTFree Online Tool
Tool Options

Select the primary language of the subtitles for better OCR accuracy

Selected Settings

OCR Language: English

Note: SUP processing may take 2-10 minutes depending on file size and complexity

Select your files
About SUP to SRT conversion

SUP files are image-based subtitle formats commonly found on DVDs and Blu-ray discs. Unlike text-based formats, SUP files contain bitmap images of subtitle text, which requires Optical Character Recognition (OCR) technology to extract the actual text content.

This tool uses advanced OCR to:

  • Extract text from SUP image-based subtitles
  • Preserve timing information from the original file
  • Generate clean SRT subtitle files
  • Handle multiple languages and character sets
What are SUP files?

SUP (Subtitle Picture) files are used for:

  • DVD subtitles - Standard subtitle format for DVD movies
  • Blu-ray subtitles - High-definition subtitle format
  • PGS subtitles - Presentation Graphics Stream format
  • VobSub format - DVD subtitle extraction format

These files store subtitles as images rather than text, which allows for complex formatting, colors, and fonts but makes them harder to edit or convert.

OCR accuracy and limitations

High accuracy for:

  • Clear, high-contrast text
  • Standard fonts and sizes
  • English and common Latin-based languages
  • Well-formatted subtitle images

May have issues with:

  • Low-resolution or blurry images
  • Decorative or unusual fonts
  • Complex Asian characters (Chinese, Japanese, Korean)
  • Heavily stylized or colored text
  • Overlapping or corrupted subtitle images
Processing time and file limits

SUP to SRT conversion is computationally intensive due to OCR processing:

  • Processing time: 2-10 minutes per file depending on length
  • File limit: Maximum 10 files per batch
  • File size: Up to 50MB per SUP file
  • Languages: Best results with English, supports 100+ languages

For best results, ensure your SUP files are from high-quality sources with clear, readable text.

Tips for better results

Before conversion:

  • Use high-quality SUP files when possible
  • Ensure files are not corrupted
  • Check that subtitles are clearly visible

After conversion:

  • Review the SRT output for accuracy
  • Manually correct any OCR errors
  • Check timing synchronization
Alternative formats

If you have SUB/IDX files instead of SUP files, please use our dedicated SUB/IDX to SRT converter tool, which is specifically designed for that format combination and provides better results.

Why Choose Our Convert SUP to SRT?
  • Free and Online: No software installation required
  • Fast Processing: Quick conversion and processing
  • Multiple Formats: Support for .sup files
  • Batch Processing: Handle up to 10 files at once
  • Privacy Focused: Your files are processed securely
  • No Registration: Start using immediately
How to Use Convert SUP to SRT
  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.