Convert SUP to SRT

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

Supports: .supMax 10 filesOutput: SRTFree Online Tool
Starting from a video file?

Pull out the subtitle track before converting SUP to SRT

This tool converts existing SUP files. If the subtitles are still inside MP4 or MKV, extract the track first.

Extract subtitle track
Tool Options

Pick the subtitle language to maximise OCR accuracy.

Selected settings

OCR language: English

SUP processing may take 2–10 minutes depending on length.

Select your files
About SUP conversion

SUP files store subtitles as images, so we run OCR to rebuild editable text. Timing information is preserved from the original file.

The converter:

  • Extracts image frames from the SUP file
  • Performs OCR to recognise text
  • Preserves timing data for each cue
  • Outputs clean UTF-8 SRT
What are SUP files?
  • DVD subtitles in VobSub/PGS format
  • Blu-ray PGS subtitles
  • Presentation Graphic Stream (PGS) files
  • Image-based captions with custom styling
OCR accuracy
  • Works best with high-contrast, standard fonts
  • Handles English and many Latin scripts reliably
  • Challenging for low-resolution or stylised text
  • Complex logographic scripts may require manual fixes
Processing limits
  • Processing time: around 2–10 minutes per file
  • Batch limit: up to ten SUP files
  • File size: up to 50 MB each
  • Language support: 100+ OCR languages
Tips for better results
  • Use high-quality SUP sources when possible
  • Review the SRT output for OCR mistakes
  • Fix any special characters manually
  • Check timing against the video
Working with SUB/IDX

For SUB/IDX pairs, switch to the SUB/IDX to SRT converter, which is tuned for that format.

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.

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