Blu-ray subtitles
Convert PGS or SUP subtitles to SRT
Read PGS tracks directly from .mkv and .mks containers, or open a standalone .sup file. Select one track or several without extracting them first.
Free, native macOS bitmap subtitle OCR
Convert PGS and VobSub subtitles to SRT on Mac.
Open an MKV, MKS, SUP, or SUB/IDX file. Choose the bitmap subtitle tracks you want. macSubtitleOCR turns them into editable SRT text with Apple Vision, then shows every result beside the image it read.
Version 1.0.0 · macOS 15+ · Apple silicon and Intel · MIT licensed
What do you need to convert?
From bitmap subtitles to text you can edit and mux.
DVD subtitles
Convert VobSub SUB/IDX subtitles to SRT
Open a paired .sub and .idx set, or recognize VobSub tracks inside .mkv and .mks files. The palette, timing, and language metadata stay together.
One local workflow
Choose a track. Recognize it. Check the result.
Bitmap subtitle input
MKV · MKS · SUP
SUB + IDX
- PGS and VobSub tracks
- Language and track names
- Original cue timing
Editable subtitle output
MyFilm.eng.srt
- Recognized text
- SubRip cue timing
- Ready to review or mux
How to make an SRT
Add, choose, make, and review.
Add your files
Drag in a file or folder, press ⌘O, use Open With in Finder, or run the Recognize Subtitles service.
Choose subtitle tracks
See each PGS or VobSub track with its language, name, flags, and cue count. Select only the tracks you need.
Make subtitles
Start recognition and follow real cue progress. By default, SRT files are saved beside the source with language-aware names.
Review and correct
Compare every line with its source bitmap. Low-confidence cues are flagged; edits are written back to the SRT as you type.
Made for this exact job
Useful when the subtitles are images, not text.
Reads the source directly
Matroska parsing and PGS/VobSub decoding are built in. You do not have to extract tracks with another app before recognition.
Only runs the tracks you choose
Skip commentary, alternate languages, and duplicate tracks. Batch a folder when you do want a whole season.
Shows what OCR actually saw
The original bitmap, cue time, confidence, and editable text appear together, so errors are visible before you use the file.
Fits a Mac workflow
The signed and notarized universal app supports drag and drop, Open With, Services, Shortcuts, notifications, and Dock progress.
Keeps conversion local
Your video, subtitle images, recognized text, optional clean-up, and translation stay on your Mac.
Free and open source
The app and SubtitleEngine library are MIT licensed. Inspect the source, build it yourself, or use the signed release.
Download
Install once. Convert on your Mac.
Download the latest signed and notarized disk image, open it, and drag macSubtitleOCR to Applications. The release is a universal app for Apple silicon and Intel.
Requires macOS 15 Sequoia or newer. Apple Intelligence clean-up requires macOS 26 and a supported Apple silicon Mac, but conversion does not.
Questions before you convert
Straight answers, without hidden panels.
How do I convert PGS subtitles to SRT on a Mac?
Open an .mkv, .mks, or .sup file, select the PGS track, and choose Make Subtitles. The app recognizes each bitmap and creates an editable SRT. See the complete PGS guide.
Can I convert VobSub SUB and IDX files to SRT?
Yes. Keep the paired files in the same folder and open either one. VobSub tracks inside MKV and MKS files work too. See the complete VobSub guide.
Is this a Subtitle Edit alternative for macOS?
For bitmap-to-text conversion, it can be. Subtitle Edit is a much broader editor; macSubtitleOCR concentrates on PGS and VobSub OCR, native Mac integration, and reviewing recognized cues.
Do I need MKVToolNix, Homebrew, or Tesseract?
No. The app reads Matroska containers, decodes the subtitle images, and recognizes them with Apple Vision by itself.
Can it open M2TS or MP4 files?
Not directly. For Blu-ray .m2ts, first remux to MKV with a tool such as MakeMKV. MP4 is usually the destination: mux the resulting SRT as a soft subtitle with Subler or another tool.
Will every recognized line be perfect?
No OCR is perfect. Small type, italics, unusual fonts, and decorative dialogue can cause errors. macSubtitleOCR flags low-confidence cues and keeps the bitmap beside the editable result so you know what to check.
Where are SRT files saved?
Beside the source by default: MyFilm.mkv can produce MyFilm.eng.srt. You can choose another folder or have the app ask before each run.
Does anything leave my Mac?
Recognition, optional Apple Intelligence clean-up, and translation run locally. The app can check GitHub once a day for a newer release; that check is optional and can be disabled.
Does it run on Intel Macs?
Yes. The published disk image is universal and runs on Intel and Apple silicon Macs with macOS 15 or newer.
Turn the bitmap tracks you already have into SRT.
No account, uploads, package manager, or companion app.