Introducing Markdown Editor: a Markdown editor and viewer for GNOME

[24icewolf42]

Innovyria is releasing Markdown Editor, a Markdown editor and viewer for GNOME modelled on GNOME Text Editor. Write on one side and read the rendered document on the other, as it will look on GitHub, Hugo or in a slide deck.

What it does

• Live preview that scrolls with the text, in both directions. Double-click the preview to jump to the source line.
• Mermaid diagrams of every type, KaTeX math, and syntax highlighting for all common languages.
• Marp slide decks: a document with marp: true in its front matter previews as slides, with Marp's themes, directives and your own theme files. The editor highlights directives and slide separators.
• GitHub and Hugo conventions: alerts, task lists you can tick in the preview, footnotes, front matter, heading anchors and links between the documents of a repository.
• Large documents stay responsive: a multi-megabyte specification re-renders only the section you edit, and diagrams draw as they scroll into view.
• Changelogs fold away until you need them.
• Tabs, find and replace, a heading outline, spell checking, formatting shortcuts, printing and HTML export.

Install

The recommended way is the signed Innovyria Flatpak repository. Updates then arrive through GNOME Software and flatpak update:

flatpak install --user https://innovyria.github.io/flatpak/io.github._24icewolf42.markdown-editor.flatpakref

Or open the install page and click Install. Each release also has a single-file Flatpak and an AppImage for GNOME 49 or newer desktops.

How it was made

Markdown Editor is built by Innovyria's autonomous software development lifecycle. AI agents implemented every feature, tested it in the running app, reviewed it in independent critique rounds, fixed what the reviews found, and versioned, packaged and released it. A person set the goals and decided what shipped. The commit history, the CI runs and the signed releases are all public.

The app is free software under the GPL-3.0-or-later.

Tell us what you think

Bug reports and feature requests are welcome in Issues. Questions and ideas belong here in Discussions. If a document renders differently than on GitHub or Hugo, the Markdown source of that document is the most useful thing you can share.

— Innovyria