Code Highlighter

Highlight code written in more than 160 languages.

After Dark uses a customized version of One Dark Syntax to produce print-friendly code highlighting for more than 160 languages.

Supported Languages
ABNF, ANTLR, APL, ActionScript, ActionScript 3, Ada, Angular2, ApacheConf, AppleScript, Arduino, Awk, BNF, Ballerina, Base Makefile, Bash, Batchfile, BlitzBasic, Brainfuck, C, C#, C++, CFEngine3, CMake, COBOL, CSS, Cap'n Proto, Ceylon, ChaiScript, Cheetah, Clojure, CoffeeScript, Common Lisp, Coq, Crystal, Cython, DTD, Dart, Diff, Django/Jinja, Docker, EBNF, Elixir, Elm, EmacsLisp, Erlang, FSharp, Factor, Fish, Forth, Fortran, GAS, GDScript, GLSL, Genshi, Genshi HTML, Genshi Text, Gnuplot, Go, Go HTML Template, Go Text Template, Graphql, Groovy, HTML, HTTP, Handlebars, Haskell, Haxe, Hexdump, Hy, INI, Idris, Io, JSON, JSX, Java, JavaScript, Julia, Kotlin, LLVM, Lighttpd configuration file, Lua, Mako, Mason, Mathematica, Matlab, MiniZinc, Modula-2, MorrowindScript, MySQL, Myghty, NASM, Newspeak, Nginx configuration file, Nim, Nix, OCaml, Objective-C, Octave, Org Mode, PHP, PL/pgSQL, POVRay, PacmanConf, Perl, Pig, PkgConfig, PostScript, PostgreSQL SQL dialect, PowerShell, Prolog, Protocol Buffer, Puppet, Python, Python 3, QBasic, R, Racket, Ragel, Rexx, Ruby, Rust, SCSS, SPARQL, SQL, Sass, Scala, Scheme, Scilab, Smalltalk, Smarty, Snobol, Solidity, SquidConf, Swift, TASM, TOML, Tcl, Tcsh, TeX, Termcap, Terminfo, Terraform, Thrift, Transact-SQL, Turing, Turtle, Twig, TypeScript, TypoScript, TypoScriptCssData, TypoScriptHtmlData, VHDL, VimL, WDTE, XML, Xorg, YAML, cfstatement, markdown, reStructuredText, reg, systemverilog, verilog

To activate the highlighter indicate the highlighting language in a fenced code block within your markdown:

```go-html-template
<div class="alert {{ with .type }}alert-{{ . }}{{ end }}">
  {{ .body }}
</div>
```

Resulting in the following highlighted code:

<div class="alert {{ with .type }}alert-{{ . }}{{ end }}">
  {{ .body }}
</div>

Or use the highlight shortcode provided by Hugo:

{{< highlight python >}}
@app.on_message(Filters.private)
def hello(client, message):
    message.reply_text("Hello {}".format(message.from_user.first_name))
{{< /highlight >}}

To add line numbers and highlighting:

5@app.on_message(Filters.private)
6def hello(client, message):
7    message.reply_text("Hello {}".format(message.from_user.first_name))

Not feeling the colors? No problem. Use the hugo gen chromastyles command to generate your own syntax.css stylesheet from the style gallery and customize it using the general-purpose Atom One Chroma syntax theme-roller.

And if you’re really enterprising why not create some executable ASCII art representing the name of the game you implemented in the language used:

                           Linus Akesson presents:
                  The Game Of Life implemented in Brainfuck

       +>>++++[<++++>-]<[<++++++>-]+[<[>>>>+<<<<-]>>>>[<<<<+>>>>>>+<<-]<+
   +++[>++++++++<-]>.[-]<+++[>+++<-]>+[>>.+<<-]>>[-]<<<++[<+++++>-]<.<<[>>>>+
 <<<<-]>>>>[<<<<+>>>>>>+<<-]<<[>>>>.+<<<++++++++++[<[>>+<<-]>>[<<+>>>>>++++++++
 +++<<<-]<[>+<-]>[<+>>>>+<<<-]>>>[>>>>>>>>>>>>+>+<<     <<<<<<<<<<<-]>>>>>>>>>>
>>[-[>>>>+<<<<-]>[>>>>+<<<<-]>>>]>      >>[<<<+>>  >-    ]<<<[>>+>+<<<-]>[->[<<<
<+>>>>-]<[<<<  <+>      >>>-]<<<< ]<     ++++++  ++       +[>+++++<-]>>[<<+>>-]<
<[>---<-]>.[- ]         <<<<<<<<< <      <<<<<< <         -]++++++++++.[-]<-]>>>
>[-]<[-]+++++           +++[>++++        ++++<     -     ]>--.[-]<,----------[<+
>-]>>>>>>+<<<<< <     <[>+>>>>>+>[      -]<<<      <<   <<-]>++++++++++>>>>>[[-]
<<,<<<<<<<->>>> >    >>[<<<<+>>>>-]<<<<[>>>>+      >+<<<<<-]>>>>>----------[<<<<
<<<<+<[>>>>+<<<      <-]>>>>[<<<<+>>>>>>+<<-      ]>[>-<-]>++++++++++[>+++++++++
++<-]<<<<<<[>>>      >+<<<<-]>>>>[<<<<+>>>>>      >+<<-]>>>>[<<->>-]<<++++++++++
[>+<-]>[>>>>>>>      >>>>>+>+<<<<      <<<<<      <<<<-]>>> >>     >>>>>>>[-[>>>
>+<<<<-]>[>>>>       +<<<<-]>> >       ]>> >           [<< <        +>>>-]+<<<[>
>>-<<<-]>[->[<      <<<+>>>>-]         <[ <            < <           <+>>>>-]<<<
<]<<<<<<<<<<<, [    -]]>]>[-+++        ++               +    +++     ++[>+++++++
++++>+++++++++ +    +<<-]>[-[>>>      +<<<-      ]>>>[ <    <<+      >>>>>>>+>+<
<<<<-]>>>>[-[> >    >>+<<<<-]>[>      >>>+< <    <<-]> >    >]>      >>[<<<+>>>-
]<<<[>>+>+<<< -     ]>[->[<<<<+>      >>>-] <    [<<< <    +>>       >>-]<<<<]<<
<<<<<<[>>>+<< <     -]>>>[<<<+>>      >>>>> +    >+<< <             <<-]<<[>>+<<
-]>>[<<+>>>>>      >+>+<<<<<-]>>      >>[-[ >    >>>+ <            <<<-]>[>>>>+<
<<<-]>[>>>>+<      <<<-]>>]>>>[ -    ]<[>+< -    ]<[ -           [<<<<+>>>>-]<<<
<]<<<<<<<<]<<      <<<<<<<<++++ +    +++++  [   >+++ +    ++++++[<[>>+<<-]>>[<<+
>>>>>++++++++ +    ++<<<     -] <    [>+<- ]    >[<+ >    >>>+<<<-]>>>[<<<+>>>-]
<<<[>>>+>>>>  >    +<<<<     <<      <<-]> >    >>>>       >>>[>>+<<-]>>[<<+<+>>
>-]<<<------ -    -----[     >>      >+<<< -    ]>>>       [<<<+> > >>>>>+>+<<<<
<-]>>>>[-[>> >    >+<<<<    -] >     [>>>> +    <<<<-       ]>>> ]  >>>[<<<+>>>-
]<<<[>>+>+<< <    -]>>>     >>           > >    [<<<+               >>>-]<<<[>>>
+<<<<<+>>-                  ]>           >     >>>>>[<             <<+>>>-]<<<[>
>>+<<<<<<<                  <<+         >      >>>>>-]<          <<<<<<[->[<<<<+
>>>>-]<[<<<<+>>>>-]<<<<]>[<<<<<<    <+>>>      >>>>-]<<<<     <<<<<+++++++++++[>
>>+<<<-]>>>[<<<+>>>>>>>+>+<<<<<-]>>>>[-[>     >>>+<<<<-]>[>>>>+<<<<-]>>>]>>>[<<<
+>>>-]<<<[>>+>+<<<-]>>>>>>>[<<<+>>>-]<<<[     >>>+<<<<<+>>-]>>>>>>>[<<<+>>>-]<<<
[>>>+<<<<<<<<<+>>>>>>-]<<<<<<<[->[< <  <     <+>>>>-]<[<<<<+>>>>-]<<<<]>[<<<<<<<
+>>>>>>>-]<<<<<<<<<+++++++++++[>>> >        >>>+>+<<<<<<<<-]>>>>>>>[-[>>>>+<<<<-
]>[>>>>+<<<<-]>>>]>>>[<<<+>>>-]<<< [       >>+>+<<<-]>>>>>>>[<<<+>>>-]<<<[>>>+<<
<<<+>>-]>>>>>>>[<<<+>>>-]<<<[>>>+<        <<<<<<<<+>>>>>>-]<<<<<<<[->[<<<<+>>>>-
 ]<[<<<<+>>>>-]<<<<]>[<<<<<<<+>>>>>      >>-]<<<<<<<----[>>>>>>>+<<<<<<<+[>>>>>
 >>-<<<<<<<[-]]<<<<<<<[>>>>>>>>>>>>+>+<<<<<<<<<<<<<-][   lft@df.lth.se   ]>>>>>
   >>>>>>>[-[>>>>+<<<<-]>[>>>>+<<<<-]>[>>>>+<<<<-]>>]>>>[-]<[>+<-]<[-[<<<<+>>
       >>-]<<<<]<<<<<<[-]]<<<<<<<[-]<<<<-]<-]>>>>>>>>>>>[-]<<]<<<<<<<<<<]

       Type for instance "fg" to toggle the cell at row f and column g
                  Hit enter to calculate the next generation
                                Type q to quit

That really is Brainfuck.