Closed Caption File Format Guide for Netflix

Closed Caption File Format Guide for YouTube

Netflix

Netflix has two recommended formats. The EMA Closed Captions Working Group has identified Scenarist (.scc) as a preferred format due to its status as the de facto standard for CEA-608 and CEA-708 data.  SMPTE-TT is also recommended as, under the applicable laws, it is considered safe if captions are compliant.

Compatible formats:

SubRip (.srt)
Scenarist (.scc)
Timed Text (.ttml)
DXFP (.dxfp)
WebVTT (.vtt)
Cheetah CAP (.cap)
MacCaption (.mcc)
Quicktime Subtitle (.qt.txt)
Spruce Subtitle File (.stl).
XML (.xml)