Your notes as Markdown

Every note in Nether is a Markdown file in a folder you choose, with its properties as YAML frontmatter at the top. You can open, edit, copy and back up those files with any other app.

Nether keeps your files as you wrote them

When you edit a note, Nether rewrites only the blocks you changed. Every other paragraph, list and table keeps its exact bytes, down to the blank lines between them, and properties change only at the keys you edited, with their comments and order kept. A block Nether writes anew uses the markers your file already uses, such as * or - for bullets.

Obsidian’s syntax works as in Obsidian

Nether reads what Obsidian writes, by Obsidian’s rules:

You write	You get
[[Note]], [[Note|alias]], [[Note#Heading]], [[Note#^id]]	A link to a note, a heading or a block
![[Note]], ![[image.png|300]]	The note, block or image shown in place
#tag, #area/project	A tag
==text==	Highlighted text
%%text%%	A comment, hidden in the note
$x^2$ and $$ blocks	Math
> [!tip] Title	A callout; [!tip]- starts it folded
^id at the end of a block	An ID that links can point to

What Markdown has no syntax for

Some blocks exist only in Nether. They are written so that any Markdown app still shows their content:

• Columns are marked with HTML comments, which other apps hide, so the columns show one after the other:

  <!-- columns -->
  <!-- column 60% -->
  The wide column.
  <!-- column 40% -->
  The narrow one.
  <!-- /columns -->

• Toggles use <details> and <summary>, which GitHub and Obsidian draw as toggles too.

• Bookmarks, links shown with a preview, are a link alone on its line: <https://example.com>.

• Underline is <u>text</u>, and a line break in a table cell is <br>.

Anything Nether does not know, such as an HTML block or a footnote, stays in the file exactly as written.