Creader is a simple source code viewer that supports syntax highlighting and styles.It automatically selects the syntax depending on the file.

It supports 30+ languages:
Bash,C,C#,C++,CSS,Diff,Go,HTML,XML,JSON,Java,JavaScript,Kotlin,Less,Lua,Makefile,Markdown,Objective-C,PHP,Perl,Plain,Python,PythonREPL,R,Ruby,Rust,SCSS,SQL,Shell Session,Swift,TypeScript,Visual Basic .NET,YAML.

It supports 10+ styles:
androidstudio ,arduino-light ,color-brewer ,dark ,github-dark ,github ,night-owl ,rainbow ,school-book ,vs ,vs2015 ,xcode