# Markdown supported code-block languages

**URL:** <https://discourse.julialang.org/t/markdown-supported-code-block-languages/69293>\
**Category:** General Usage\
**Tags:** markdown\
**Created:** [October 6, 2021, 11:44am UTC](https://discourse.julialang.org/t/markdown-supported-code-block-languages/69293 "2021-10-06T11:44:22Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![disberd](https://avatars.discourse-cdn.com/v4/letter/d/8edcca/32.png) [@disberd](https://discourse.julialang.org/u/disberd)\
**Post date:** [October 6, 2021, 11:44am UTC](https://discourse.julialang.org/t/markdown-supported-code-block-languages/69293/1 "2021-10-06T11:44:22Z")

</div>

What are the language supported for synthax highlighting in markdown?

Like this in a Pluto notebook for example:

 ![image](https://global.discourse-cdn.com/julialang/original/3X/f/1/f10fbc93943f1827f4b9ceb728a006337eabcdbf.png)

I have seen `javascript` and `julia` being used but didn’t find any reference saying which languages are supported

---

<div class="post-metadata">

**Author:** ![moble](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/moble/32/23535_2.png) [@moble](https://discourse.julialang.org/u/moble)\
**Post date:** [February 6, 2025, 5:22pm UTC](https://discourse.julialang.org/t/markdown-supported-code-block-languages/69293/2 "2025-02-06T17:22:14Z")

</div>

I know this is late, but this is almost the only thing that turns up when I search for this.

Markdown _per se_ doesn’t actually support any languages; it just lets you attach a string that a renderer is supposed to interpret as a language. So it’s really up to the renderer to support languages. See [here](https://github.com/JuliaLang/julia/issues/35456) for some authority on that.

Now, from what I can see in the HTML, both Pluto.jl and Documenter.jl use the `highlight.js` package to actually highlight code snippets. The list of supported languages is [here](https://github.com/highlightjs/highlight.js/blob/d301848ccf1354dc8845e00e7aee062d60c94437/SUPPORTED_LANGUAGES.md).