$ ttx -l SourceHanSans.ttc
While a standard TTF (TrueType Font) file contains one font face (e.g., “Arial Regular”), a TTC file is a container that holds multiple fonts in a single file. These are typically font families (Regular, Bold, Italic, Bold Italic) or CJK (Chinese, Japanese, Korean) fonts with massive character sets. convert ttc font to ttf work
Converting a TTC to TTF isn’t as simple as renaming the extension. A TTC file might contain 2, 5, or even 10 separate fonts. Trying to open it in a font editor without extraction yields an error: "This is a font collection, not a single font." $ ttx -l SourceHanSans