netflix-to-srt VS OpenCC

It is possible to download subtitles from neflix. https://github.com/isaacbernat/netflix-to-srt

netflix-to-srt: extract and convert subtitles to .srt from .xml/dfxp/ttml and .vtt/WebVTT (e.g. Netflix)

For netflix specifically I used https://github.com/isaacbernat/netflix-to-srt, which mostly worked, although I had to tweak the regex.

Try Open Chinese Convert. You can also install OpenCC via Homebrew as well. macOS can can convert between the two character sets, although it's not as smart as OpenCC (for example, macOS will convert「才」 to 「纔」 whereas OpenCC won't do this).

OpenCC: convert between traditional and simplified Chinese, see also http://opencc.byvoid.com/

Oh, also, there’s an online demo where you can test out the conversions. Also note that there may appear to be blanks in some of those files, or they may appear like empty rectangles, because some are very rare unicode characters. It’s possible to view them with special fonts or at GlyphWiki (example).

Many popular TV shows and movies have both traditional and simplified subtitles, and often have dual English/Chinese subtitles in both character sets. However if traditional subtitles are not available, then your only recourse is to convert a simplified subtitle to traditional. macOS has this functionality built-in, or you can try OpenCC (this is the GitHub repository. A web-based version is available here).