#markdown #html #syntax #code #highlighting


A Markdown to HTML converter and code syntax highlighter using pulldown-cmark and treesitter

1 unstable release

0.1.3 Mar 21, 2023

#300 in HTTP server

43 downloads per month




A blazingly fast markdown to html parser and syntax highlighter built using the pulldown-cmark and tree-sitter-highlight crate natively. PRs are welcome. Very much a WIP


cargo add femark


The package exposes one function that will process your markdown and compile it to HTML. It will also generate a table of contents for you with your heading tags and their respective level. If you have no headings, toc should will be None, but if there is an error parsing your markdown, it will throw an error.

It is recomended to run this on the server, since it has a fairly large package size.

 use femark::{HTMLOutput, process_markdown_to_html};
 let HTMLOutput{content, toc} = process_markdown_to_html('# Hello, World!');

Supported Languages

  • Rust
  • Typescript
  • Tsx
  • Javascript
  • Jsx
  • Dockerfile
  • Python
  • Nix
  • Go
  • C
  • HTML
  • TOML
  • JSON

Currently the supported languages are driven mostly by my needs, but I am open to PRs to add additional language support if they are popular.


By default, this package does not style your code blocks, merely decorates the elements with classes that range from hh0 to hh20. The indices refer to the elements in this list:

let highlight_names = [

For example, hh0 would refer to an attribute and hh20 would be a label. You'll want to add some css classes for each attribute. Because this is a common tree-sitter theme, if you search for neovim themes that support tree-sitter, you can find items like TSFunction and TSAttribute with examples. A basic theme is provided below:

.hh4 {
  color: purple;

.hh3 {
  color: blue;

.hh13 {
  color: pink;

.hh10 {
  color: green;

.hh5 {
  color: gray;

.hh18 {
  color: lightgray;


~1M SLoC