Yet Another Markdown Parser





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4yrs ago






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by @angrykoala

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Yet Another Markdown Parser

The aim of this package is to provide an easy-to-use toolbox for markdown-related task including Html & Pdf conversion.


  • HTML conversion
  • PDF conversion
  • Code highlight support
  • Github-style and academic output
  • API to use yamp programmatically
  • Custom styles
  • CSS-embedded HTML (just open it offline in any browser)
  • HTML tags support (for PDF output too)
  • Include other files in your markdown
  • HTML presentations
  • Front Matter metadata
  • Custom xejs-based tags ({{}})
  • Koalafied

Upcoming features

  • Custom templates
  • Client-side web support (browserify)

Check the project roadmap and our cute kanban board


To use yamp cli, install it globally using npm:

npm install -g yamp

If you want to use the API instead, install it locally:

npm install --save yamp

then, include yamp in your javascript:

var yamp = require('yamp');


To create a .pdf file from your markdown file, simply type:

yamp <file.md>

For example:

yamp README.md

Will generate readme.pdf.


  • -h, --help to display a basic usage information
  • -V, --version to display yamp version installed
  • -o, --output <file> output filename (without extension) e.g. yamp my_file.md -o final_name
  • --pdf to generate a pdf (default)
  • --htmlto generate html
  • --remarkto generate a html presentation using remark
  • -t, --title [value] to add a custom title to Html pages
  • --style <file> to set change the css style (supports the provided styles and custom styles)
    • Option not suported along with --no-style
  • --no-style to disable CSS styling
    • Option not supported along with --style <file>
  • --list-styles will list all the styles provided by yamp
    • These styles will be supported by --style option
  • --minify to minify Html output
  • --no-tags to disable custom Yamp tags
  • --no-highlight to disable code highlight
  • --no-front-matter to disable front-matter metadata
  • -k, --koala to koalify your outputs

To generate pdf and html with default styling and options:

yamp myFile.md --pdf --html

The --no-highlight and --no-style options will greatly reduce your Html and Pdf outputs

Yamp tags

Yamp supports extra tags in your markdown files. Currently using xejs templates. All tags are written between double braces {{ ... }} and are not case-sensitive

  • include [file.md]: Includes the given text file (markdown or not), the tags on the included file will also be parsed, allowing nested file structure.
  • date: Will write the current date (at the moment of rendering).
  • page break: Will force a page break in pdf output.
  • yamp version: Will display the yamp version used to render the document.

Starting a tag with {{# will create a comment tag that will not be rendered into the final file

Yamp styles

Yamp provides several styles for your document (supported for html and pdf outputs).

  • github.css Default style, will look similar to Github style
  • acm-sig.css Academic style based on ACM SIG templates

You can select any of these styles with the option --style [style.css], the same option will enable you to use your own files instead --style [myfolder/mystyle.css]

You can always check the styles with the option --list-styles


Include yamp in your javascript with:

var yamp = require('yamp');

You'll have access to different renderers to process your files:

  • yamp.renderers.html to process a markdown file into an full Html page
  • yamp.renderers.pdf to process a markdown into a pdf

To use a renderer:

var myRenderer = new renderers.pdf(options);
renderer.renderFile(myFile, function(err){
    if (err) return console.log("Error while rendering: "+err);
    else console.log("Rendering was successful");


The options accepted by the default renderers are:

  • outputFilename: name of the output filename (without extension), will default to the input filename
  • highlight: (true) indicates if code blocks should be highlighted
  • style: (true) indicates if default style should be used or no style at all. If a filename is passed, it will use it as custom css style
  • minify: (false) whether the Html output should be minified or not
  • title: Custom title for the Html page
  • tags: (true) whether to parse yamp tags or not ({{ ... }})
  • koala: (false) true to koalify your outputs

Creating new renderers

If you need a custom renderer, instead of using one of the defaults you can extend directly from Renderer class or any of the default renderers:

class MyCustomRenderer extends yamp.Renderer {
    constructor(options) {
        super(options, "default.ejs", yamp.parsers.md2Html);
        this.output="html"; //desired output extension

        //Modify filename or this.fileLoader before loading it

    beforeRender(templateOptions) {
        // Modify the data passed to the template before rendering, including title, content and options
    afterRender(content) {
        // Modify template result (Html)

    fileOutput(content,done) {
        // Write file (preferably to this.options.outputFilename) in the desired format using a parser

Custom parser: It is possible to use a custom parser from markdown to Html instead of the built-in yamp.parsers.md2html, the parser must be a function of the type function(originalString,options,callback) that will translate from originalString (markdown) to html, calling the callback(err,res) afterwards.

If, instead of extending from yamp.Renderer you are extending from one of the default renderers, you should only re-implement the methods you need, and usually you should call super().methodName to maintain its basic functionality.

Development Instructions

To contribute to yamp you should clone the official repository https://github.com/angrykoala/yamp or your own fork with git.

You can also download it from GitHub clicking here

  • To install execute npm install in the downloaded/cloned folder
  • To test, execute npm test
    • The tests will also run jshint
  • To execute the CLI, execute npm start -- <file> [options]
  • To install your local version globally, execute npm install -g . on the project folder
  • To generate documentation (with installed version of yamp) execute npm run docs

It is strongly recommended to install the npm repository version instead of your local copy


If you want to contribute to yamp please:

  2. Fork from dev branch
  3. Make sure tests passes before pull request
  4. Check the opened and closed issues before creating one

Thanks for your help!


YAMP is developed under GNU GPL-3 license by @angrykoala

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