Yet another markdown parser built for speed, Compliant to CommonMark specification markdown commonmark gfm markdown-flavors
0.5.0 Latest release released
109 29 6


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Unfortunately, the maintainer no longer has the time and/or resources to work on markd further. This means that bugs will not be fixed and features will not be added unless someone else does so.

If you're interested in fixing up markd, please file an issue let me know.

Yet another markdown parser built for speed, written in Crystal, Compliant to CommonMark specification (v0.29). Copy from commonmark.js.


Add this to your application's shard.yml:

    github: icyleaf/markd

Quick start

require "markd"

markdown = <<-MD
# Hello Markd

> Yet another markdown parser built for speed, written in Crystal, Compliant to CommonMark specification.

html = Markd.to_html(markdown)

Also here are options to configure the parse and render.

options = true, safe: true)
Markd.to_html(markdown, options)


| Name | Type | Default value | Description | | ----------- | ------ | ------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | time | Bool | false | render parse cost time during read source, parse blocks, parse inline. | | smart | Bool | false | if true, straight quotes will be made curly,
-- will be changed to an en dash,
--- will be changed to an em dash, and
... will be changed to ellipses. | | source_pos | Bool | false | if true, source position information for block-level elements
will be rendered in the data-sourcepos attribute (for HTML) | | safe | Bool | false | if true, raw HTML will not be passed through to HTML output (it will be replaced by comments) | | prettyprint | Bool | false | if true, code tags generated by code blocks will have a prettyprint class added to them, to be used by Google code-prettify. | | gfm | Bool | false | Not supported for now | | toc | Bool | false | Not supported for now | | base_url | URI? | nil | if not nil, relative URLs of links are resolved against this URI. It act's like HTML's <base href="base_url"> in the context of a Markdown document. |


If you want to use a custom renderer, it can!

class CustomRenderer < Markd::Renderer

  def strong(node, entering)

  # more methods following in render.

options = true)
document = Markd::Parser.parse(markdown, options)
renderer =

html = renderer.render(document)


Here is the result of a sample markdown file parse at MacBook Pro Retina 2015 (2.2 GHz):

Crystal Markdown (no longer present)   3.28k (305.29µs) (± 0.92%)       fastest
           Markd                       305.36 (  3.27ms) (± 5.52%) 10.73× slower

Recently, I'm working to compare the other popular commonmark parser, the code is stored in benchmarks.

How to Contribute

Your contributions are always welcome! Please submit a pull request or create an issue to add a new question, bug or feature to the list.

All Contributors are on the wall.

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MIT License © icyleaf

  github: icyleaf/markd
  version: ~> 0.5.0
License MIT
Crystal >= 0.36.1, < 2.0.0


Dependencies 0

Development Dependencies 0

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