Write Markdown.
See it rendered, instantly.

What it does

Built for writing, not managing settings. Every feature is one most Markdown files actually need.

• Live preview

  Every keystroke updates the rendered pane, including GitHub-flavored tables.

• Folder browser

  Open a folder once; the sidebar remembers it and lists your Markdown files.

• Undo & redo

  Full edit history per session, mapped to the shortcuts you already know.

• Export to PDF

  Turn a rendered document into a shareable PDF in one menu action.

• Unsaved-change tracking

  The title bar tells you what's open and whether it's been edited.

• Desktop Java app

  A Swing editor with a bundled Windows installer — no browser, no Electron, no background services.

• AI writing assistant

  Summarize, rewrite, or correct grammar using local Ollama models, OpenAI, or Gemini.

• Review before applying

  Generated Markdown stays in a review window until you choose to replace, insert, or copy it.

AI assistance, on your terms

Use a model running privately on your computer or connect your own cloud API key. AI is optional and never interrupts the normal Markdown workflow.

• Summarize

  Condense a selected passage or the full document while preserving important facts, links, and Markdown structure.

• Rewrite

  Improve clarity and readability without changing the original meaning.

• Fix grammar

  Correct grammar and spelling while keeping headings, lists, tables, links, and code blocks intact.

• Choose your provider

  Connect to Ollama locally, or use your own OpenAI or Gemini API key and model.

Supported providers

• Ollama — local, no API key
• OpenAI Responses API
• Google Gemini API

1. Configure a provider

   Open AI → AI Settings, select a provider and model, then enter an API key only when a cloud provider requires one.

2. Select what to edit

   Select Markdown to work on, or leave nothing selected to use the entire document.

3. Review the result

   Choose Replace Source, Insert Below, or Copy only after checking the generated Markdown.

Privacy: API keys remain in memory and are never saved. Before the first cloud request of a session, MarkdownEditor shows how many characters will be sent and asks for confirmation. Ollama requests stay on your computer.

Using it

Four steps from download to a finished document.

1. Download the app

   Grab the latest Windows installer from the Releases page. It bundles a Java runtime, so a separate JDK is not required.

2. Open a file or folder

   Use File → Open for a single document, or File → Open Folder to browse a whole project in the sidebar.

3. Write

   Type Markdown on the left. The right pane updates as you go — no separate preview command to remember.

4. Save or export

   Save back to .md with Ctrl+S, or turn the current preview into a PDF from the Export menu.

Contributing

The project is built in NetBeans with drag-and-drop Swing forms, so the fastest path in is opening it the same way.

1. Clone the repo

   git clone https://github.com/aungthuhein2005/MarkdownEditor.git

2. Open in NetBeans

   Use File → Open Project and select the cloned folder. The UI forms open in the Design view, controllers and models are plain Java.

3. Make your change

   The app follows a light MVC split — model/, controller/, and ui/ — so most fixes touch one package at a time.

4. Open a pull request

   Push a branch and describe what changed and why. Small, focused PRs are easiest to review.

Found a bug instead? Open an issue with your OS and Java version — the app includes both in the report template.

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