mistlefoot

Installation

pip install mistlefoot

Features

• Subscript & Superscript: H~2~O and E=mc^2^
• Highlighting: ==marked text==
• Strikethrough: ~~deleted text~~
• Emojis: :smile: :rocket: :heart: (50+ supported)
• Auto-linking: URLs automatically become clickable links
• Footnotes: Reference[^1] with definitions
• Task lists: GitHub-style checkboxes
• Heading attributes: Add IDs, classes, and custom attributes to headings

Usage

from IPython.display import HTML,Markdown,display
from mistletoe import markdown

markdown('**aa**', ExtendedHtmlRenderer)

'<p><strong>aa</strong></p>\n'

def render_md(md): return HTML(markdown(md, ExtendedHtmlRenderer))
def  print_md(md):       print(markdown(md, ExtendedHtmlRenderer))

markdown_text = """
#### My Document {#intro .important}

This is **H~2~O** and ==highlighted text==.

Check out https://fast.ai :rocket:

- [x] Done
- [ ] Todo
"""

render_md(markdown_text)

My Document

This is H₂O and highlighted text.

Check out https://fast.ai 🚀

• Done
• Todo

Examples

Scientific notation:

render_md("H~2~O and E=mc^2^")

H₂O and E=mc²

Emojis:

render_md("Great work! :tada: :100:")

Great work! 🎉 💯

Footnotes:

render_md("""Here's a claim[^1].

[^1]: This is the supporting reference.""")

Here's a claim^[1].

Heading attributes:

print_md('#### Section {#my-id .important data-level=\"1\"}')

<h4 id="my-id" class="important" data-level="1">Section</h4>

Contributing

By Jeremy Howard. Copyright ©️ fast.ai 2026 onwards. Contributions welcome.