Rouge

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Try some code

def fib(n):    # write Fibonacci series up to n
    """Print a Fibonacci series up to n."""
    a, b = 0, 1
    while a < n:
        print a,
        a, b = b, a+b

Plenty of Languages

Rouge supports 220 languages and counting, including Ruby, JavaScript, Swift, Go, C++, and Haskell. Our contributors are adding more languages all the time.
Language Parsing

Rouge aims for the highest quality lexing in all its supported languages, even with strange features and odd corner cases. Try it above and see for yourself!
Pygments Compatible

Rouge themes are 100% compatible with Pygments' stylesheets. No need to remake your theme, and no need to spawn a Python process either. Rouge is made in Ruby.

{ Rouge }

An elegant, extendable code highlighter written in pure Ruby.

Available on GitHub

Plenty of Languages

Language Parsing

Pygments Compatible