Footnotes allow readers to quickly reference additional information without cluttering the main content.

Quarkdown introduces a compact [^label: definition] syntax which allows inlining footnote definitions directly in their reference:

This is a footnote reference[^first: This is the definition.],
and another one[^second: This is another definition.].

In case an inlined footnote does not need to be referenced anywhere else, the label may be omitted (anonymous footnote):

This is a footnote reference[^: This is the definition.],
and another one[^: This is another definition.].

The definitions generated by named footnotes can be referenced again:

This is a footnote reference[^first: This is the definition],
and another one[^first].

Definitions can include inline formatting:

This is a footnote reference[^first: This is the **definition**.]

The 'standard' footnote syntax provided by many Markdown flavors is also supported.

This approach is more verbose but allows for a clean separation between the footnote reference and its definition, reducing clutter.

This is a footnote reference[^1].

[^1]: This is the definition.

Inline formatting is also supported in the definition:

[^1]: This is the **definition**.

Long definitions can be split across multiple lines. Indentation is not significant:

[^1]: This is
      the definition.

In case of multiple footnotes, make sure the definitions are separated by at least one blank line:

This is a footnote reference[^first], and another one[^second].

[^first]: This is the definition.

[^second]: This is another definition.

Multiple references to the same footnote label are allowed, and they will all point to the same definition:

This is a footnote reference[^first], and another one[^first].

[^first]: This is the definition.

The footnote label can be any string, and the definition can occur anywhere in the document:

[^first]: This is the definition.

This is a footnote reference[^first], and another one[^second].

[^second]: This is another definition.

Footnotes are numbered by default with decimal numbers, starting from 1. To apply a different numbering style, such as Roman numerals, the .numbering function can be used:

.numbering
  - footnotes: i

See Numbering for more information about numbering.

Footnotes are numbered incrementally across the document. Page-level numbering is not supported yet.

Footnotes are rendered differently depending on the document type. See Document types to learn more.