Open Source C# Markdown Editors

OneNote Md Exporter is a console application running on Windows that exports your OneNote notebooks in different markdown formats. Evaluate or migrate to an alternative Knowledge Management Software like Joplin, Obsidian or other software based on Markdown format. Backup your OneNote Notebooks in an interoperable and open file format.

I have been waiting long enough for a modern Windows 10 notepad app to come before I decided to create one myself. Don’t get me wrong, Notepad++, VS Code, and Sublime are great text editors. I have used them all and I will continue to use them in the future. However, they are either too heavy or look less appealing. There are times that I just wanted to use Windows Notepad for things like writing notes or editing config files. So I decided to create a win32 notepad replacement here and try to give it a modern look and feel. Most importantly, it has to be blazingly fast and appeal to everyone.

Markdown Monster is a powerful, yet easy-to-use Markdown editor with syntax highlighting and sophisticated and fast edit features. A collapsible, synced, live preview lets you see your output as you type and scroll. Easily embed or paste images, links, tables and code using raw markup or our smart UI helpers to simplify many operations with a few keystrokes or a click or two. Paste images from the clipboard or drag and drop from Explorer or our built-in file browser. Inline spell-checking and word counts keep your content streamlined. You can export Markdown to PDF or HTML on disk or copy Markdown selections as HTML to the clipboard. The HTML preview can display syntax-colored code snippets for most coding languages. Choose from light or dark app themes, and individual and fully customizable preview themes. Use the built-in folder browser to open, manage and drag files into content, use the document outline to quickly jump through content, or use our shell integration.

A fast, powerful, CommonMark compliant, extensible Markdown processor for .NET. Very fast parser and HTML renderer (no-regexp), very lightweight in terms of GC pressure. Abstract Syntax Tree with precise source code location for syntax tree, useful when building a Markdown editor. Check out MarkdownEditor for Visual Studio powered by Markdig! Even the core Markdown/CommonMark parsing is pluggable, so it allows to disable built-in Markdown/Commonmark parsing (e.g Disable HTML parsing) or change behavior. Parses trivia (whitespace, newlines and other characters) to support lossless parse ⭢ render roundtrip. This enables changing markdown documents without introducing undesired trivia changes. Special attributes or attached HTML attributes (inspired from PHP Markdown Extra - Special Attributes). Diagrams extension whenever a fenced code block contains a special keyword, it will be converted to a div block with the content as-is.

Tern is a free, open-source Markdown editor for Windows. Write in Source, Split or Reading mode, organize local notes in workspaces, and navigate with an outline, backlinks and full-text search. Preview tables, task lists, code, images, supported math and Mermaid diagrams. Export to PDF, self-contained HTML or plain text. Document recovery, local saved-text history, and encoding and line-ending preservation help protect your work. Optional AI connections and manual MCP tools use services you configure. Remote images and network features can contact external services; see the documentation for privacy details. The Windows x64 ZIP includes its .NET runtime. Extract the complete archive and run Tern.exe. Tern is MIT-licensed; bundled dependencies retain their own licenses. The current release is unsigned, so Windows may show an Unknown publisher or SmartScreen warning.

A minimalistic portable markdown editor for windows with live preview capability.