helloMDX

MDX is a desktop WYSIWYG Markdown editor for Windows, macOS and Linux. You edit plain .md files that look like a formatted document while you write, so you never see Markdown syntax, yet the file on disk stays standard Markdown.

It is built for researchers, graduate students and technical writers who need more than basic formatting:

Math without LaTeX. Inline and block equations are written in a visual math editor, and MDX generates the LaTeX on export. Citations. Import a BibTeX, RIS or CSL-JSON library, insert citations from a sidebar picker, and get a numbered bibliography automatically on export. Export to Word, PDF and HTML. DOCX keeps rendered math and numbered references, which makes it easy to send drafts to supervisors or co-authors who use Word. Visual diagrams. You draw diagrams in the editor instead of writing Mermaid syntax. Tables, code blocks, images and headings from a familiar formatting toolbar. AI writing suggestions (optional). Tab-to-accept suggestions use your own API key (OpenAI, Anthropic, Google, xAI, Ollama/local models or any OpenAI-compatible endpoint). Keys are stored in the system keychain. Private by design. There are no accounts, no telemetry and no MDX servers. Files stay on your disk, or you sync them with iCloud Drive, Google Drive, Dropbox or OneDrive. MDX also works well for cleaning up and formatting Markdown output from AI tools such as ChatGPT, Claude, Gemini and NotebookLM.

Pricing is a $15 one-time purchase with all features and free updates on every platform, with no subscription. A 14-day free trial is available without a credit card.