SUP → SRT
Convert Blu-ray PGS image subtitles locally in your browser.
- 100% in your browser
- No upload
- Free
Drop a Blu-ray .sup file here, or click to browse
PGS image subtitles · up to 256 MB · processed in your browser
Frequently asked questions
What is a SUP file?
Blu-ray subtitles are stored as image-based PGS streams in .sup files. Players overlay them as bitmaps; converting to text-based SRT requires OCR.
Can I upload a .sup file here today?
Yes. The PGS bitmap file is decoded and OCRed entirely in your browser.
Do my files leave my device?
No. The .sup file and rendered subtitle images stay on your device; only the browser downloads the OCR engine and selected language data.
What happens to low-confidence cues?
Cues the first pass is unsure about automatically get a second local pass with different recognition settings (single-line mode, upscaling for small text). Anything still uncertain is highlighted in the preview so you can fix it by eye. Everything runs in your browser — no server, no AI service.