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Kulfon (pre-alpha)

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Kulfon is a « one command », static site generator written entirely in JavaScript. It's fast, modern and simple.

This software is still under active development and not feature complete or ready for consumption by anyone other than software developers.

Kulfon: a 100% JavaScript static site generator

Website | Documentation | Installation Guide | Contribution Guide | Twitter

- Kulfon, Kulfon, co z Ciebie wyrośnie ?! martwię się już od tygodnia!

- Przestań!

While you're hesitating, listen to this wonderful Kulfon song!


Kulfon does live reloading by default in development mode.

Kulfon: Hot Reloading

Why Kulfon?

There is a ton of static site generators out there. Here are few points to convince you to try Kulfon

Table of Contents


yarn global add kulfon


npm install -g kulfon

Getting started

Once Kulfon is installed, you will have access to the kulfon command. First, let's create a new project:

kulfon init <my-project-name>

It creates the following directory structure (<my-project-name> is optional, if not provided, the current directory is used):

├── config.yml
├── public
└── website
    ├── data.yml
    ├── images
    │   └── logo.svg
    ├── javascripts
    │   └── main.js
    ├── layouts
    │   └── base.html
    ├── pages
    │   ├──
    │   └── index.html
    ├── partials
    │   └── meta.html
    └── stylesheets
        └── styles.scss

Now enter the directory

cd <my-project-name>

and run kulfon's server

kulfon serve

It creates public directory with compiled content (this directory should be ignored). Go to http://localhost:3000 to check your website.

For more commands, just type


Compiling the project

You can quickly compile your website using kulfon compile. This will generate public directory which should be copied to your remote server to be handled by a web server such as Apache or Nginx.


Kulfon can deploy your website to a remote location using [rsync][20]. You need to specify the server as IP or alias from .ssh/config, the the path in your config.yml.

  server: nu02
  path: /srv/www/

Once configured, you can issue kulfon deploy to upload your website to the specified location.

Data files

You can specify custom data that can be accessed in your views using data files. Those are YML files which can be either stored in website/data directory or using a single data.yml placed directly in website. By default website/data.yml is used; if set, data directory has higher priority.

Front matter

Each html file can have a front matter with additional meta information which will be merged into data object available in the pages e.g.

title: This is my title
{% extends "layouts/base.html" %}
{% block content %}
<h2>My Page: {{ data.title }}
{% endblock %}

Meta headers

Kulfon comes with preconfigured meta headers, including Facebook's Open Graph and Twitter Cards. The values are set through data files using meta.* branch, e.g. meta.description to set content for <meta name='description' />. Check website/partials/meta.html for all available values.

NPM Search

Kulfon can search NPM registry using NPMS API, e.g.

kulfon search jquery

By default it fetches the first 25 results that match the specified query. If there is more than 25 results, you can paginate that list using --page (or -p) parameter with default 1 for the first page i.e. the first 25 results and 2 for the next 25 results, etc.

Blog support

Kulfon supports simple blog management. Let's start by creating a blog directory inside pages. Each post would be just a html or markdown file inside that directory. Additionally, you can prefix your files with a date to include it in the generated URL e.g. would be generated as /blog/2016/12/here_goes_my_blog_post_title.

Asset Dependency Management

Kulfon allows to easily add external asset dependencies such as stylesheets or javascripts. It uses NPM registry for that. There are two ways of adding assets to your website from NPM, i.e. via unpkg CDN service or by installing them locally with Yarn (or npm).

Using unpkg for managing asset dependencies

unpkg approach is the most easy and convenient one, but it requires being online while developing your website. In a nutshell it adds either stylsheets or javascripts as separate <link ...> or <script ...> entries for each specified dependency and then it integrates it with your main JavaScript or CSS file. This method is also HTTP/2 friendly.

Using Yarn for managing asset dependencies

For simple HTML/CSS/JS website using Yarn (or just npm) may be an overkill, but it allows a more fine-grained control over what is produced in the final CSS/JS bundle. When you use Sass libriaries this is also the only way to go.

Use cases

Here are few use cases to help you develop a proper intuition when working with Kulfon.

Adding tachyons

tachyons is one of my favorite CSS libraries. It is small and powerful. Let's see how we can start using it in our project.

First, let's check NPM registry by using search command

kulfon search tachyons
tachyons - :
tachyons-cli - :
react-native-style-tachyons - :
ember-cli-tachyons-shim - :
tachyons-sass - :
tachyons-modules - :
tachyons-validate-classnames - :
ds-css-cli - :

There are several possibilities, but we will include the whole library at once.

kulfon add tachyons

Restart the Kulfon server, open your website and View Page Source. There will be a new <link ...> entry added to the <head> just above your main stylesheet file.

<link rel="stylesheet" href=""/>
<link href="/styles.css" rel="stylesheet">

Adding bourbon

Bourbon is a lightweight Sass library that helps you write more effective stylesheets.

Let's add bourbon as a dependency which will be included during Sass compilation.

kulfon add bourbon

Now you can include it at the top of stylesheets/styles.scss

@import 'bourbon';

Adding bootstrap

Bootstrap is the most popular HTML, CSS, and JS framework for developing responsive, mobile first projects on the web.

There are two ways of integrating bootstrap using Kulfon. You can either include it as whole through unpkg CDN, or you can integrate it during Sass compilation; the latter solution allows you to easily customize the library e.g. by including only the modules you need.

In the first case you have to just add bootstrap package

kulfon add bootstrap

To use a Sass version you need to use bootstrap-sass NPM package.

kulfon add bootstrap-sass

and then you need to include bootstrap at the top of stylesheets/styles.scss

@import 'bootstrap'


Kulfon keeps track of the upcoming fixes and features on GitHub Projects: Kulfon Roadmap


Kulfon comes with several themes out-of-the-box. You can check the list of available theme at or via kulfon list themes.

By default when initialising a new website, Kulfon uses default theme. You can specify another theme to use with --theme option (or -t for short)

kulfon init new-website --theme bare

It is very easy to create your own theme: you just need to create a website structure which will be used as the template at the initialisation stage. Feel free to contribute that theme to this repository.


This is the most basic theme that provides a minimal directory structure that can be transformed by Kulfon. There is no styling nor additional scripts.

Kulfon Theme: Bare]


Default theme comes with a preconfigured CSS framework called Bulma. It provides basic views and components such as navigation, landing and footer.

Kulfon Theme: Default]


This is a more elaborated page structure with 3 columns.


Kulfon Theme: Tachyons]

Websites that use Kulfon

If your website is using Kulfon, feel free to make a PR to add it to this list; please add the new entries at the top.

Bug reports

We use Github Issues for managing bug reports and feature requests. If you run into problems, please search the issues or submit a new one here:

Detailed bug reports are always great; it's event better if you are able to include test cases.