PHP-Markdown-extra compatible Javascript markdown syntax parser
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ver 1.2.0
based on PHP Markdown Extra 1.2,5
originally developed by boumankan

What's this?

js-markdown-extra is a experimental JapaScript port of PHP Markdown Extra.

PHP Markdown Extra demo

I couldn't retain complete comaptibility because of difference between PHP's regular expression and JavaScript's one, but it can convert most of simple markdown text. perhaps.


You can try in your hand.

Demo page

How to use

Load this script in HTML and call Markdown function.

    //example :
    var html = Markdown( text );


It has possibility of entering infinite loop by some user input because I try to port PHP Markdown Extra with incompatible regular expression test. Please stand by to kill your browser process. I prefer to use it under dual core CPU.

Known issues

  • Emphasis or strong syntax may have a bug.
  • Possible to freeze when incomplete syntax.
  • Bracket nesting more than twice for link is unsupported. (is as standard spec)



This software is based on BSD license.

Free for modification, redistribution and embedding if copyright included.


Shall we not be liable for any damages caused by this software.


1.2.0 - 2012-10-16

Stable version as 1.2.0 released.

1.2 (beta) - 2012-10-11

Completely rewritten based on PHP-Markdown-1.2.5.

1.1 - 2008-05-31

BUGFIX: Reference syntax with empty title. (Thanks to reporter)

1.0 - 2006-07-08

1st release.