Languages: 🇯🇵 日本語 or 🇺🇸 English
**MD//WORKS is the only editor that transforms your document into a secure, portable application. No installation. No cloud. All you need is a browser, yet everything runs entirely locally. Unlike tools like TiddlyWiki or ZIP archives, your document can be opened and edited anywhere effortlessly.
💡 Supercharge Your Writing with Browser AI: Seamlessly connect with Chrome Gemini or Brave Leo from the sidebar for instant proofreading and translation. Utilizing Brave Leo unlocks multi-tab context processing (Windows & iPad), letting you synthesize data from multiple store pages or reference PDFs at once—something even MS Word can't do. For more information, see "11. AI-Assisted Writing" in the manual.
👉 https://hkjpn.github.io/markdown-editor/
Try it instantly in your browser.
- Centralized Esc key handling: Unified the behavior of the Escape key for a more consistent user experience.
- Help menu & Documentation modal: Added a new Help menu and an in-app documentation modal for easier access to guides.
- 'Select All' in Preview: You can now use
Ctrl+A/Cmd+Awithin the preview screen. - Rich text copying: Added support for copying rich text directly from the preview.
- Improved navigation accuracy: Enhanced the precision of automatic scrolling to search results and outline jumps.
To ensure security and file integrity, all official releases starting from v1.5.4 include SHA-256 hash values in the release notes. You can verify that your downloaded file has not been tampered with by using standard OS commands (such as Get-FileHash in Windows PowerShell).
- Invisible character display: Add display options for full-width spaces, tabs, trailing spaces, and line breaks.
- Advanced Tab controls: Add Tab input, multi-line indentation, and
Shift+Taboutdent support. - Zen Mode & Fullscreen: Add fullscreen controls and Zen Mode for a more focused writing experience.
- UI improvements: Improve title-bar button icons and active-state visual feedback.
- Security hardening: Add minor security updates, including CSP improvements, safer Word import messaging, and SVG data URL restrictions.
- Storage clarity: Clarify that Auto Save is encrypted to protect against plain-text local storage extraction, while Private Storage remains available for additional passphrase-based protection.
- Expanded help: Expand the Keyboard Shortcuts documentation to include Tab operations, document navigation, and text selection shortcuts.
Bring Word documents directly into your Markdown workflow.
- UI: Accessible via File › Import Word.
- Imports headings, paragraphs, lists, and simple tables
- Converts Word content into editable Markdown
- Handles complex tables and shapes as readable placeholders
- Prioritizes content fidelity over visual mimicry
Ideal for turning Word drafts, manuals, reports, and meeting notes into clean Markdown text.
MD//WORKS is fully open-source—no exceptions. Although it runs in the browser as an HTML app, your documents are processed locally on your device. Editing, saving, exporting, and encryption are performed in the browser, and your document data is not uploaded to a server.
- No installation.
- No account.
- No analytics, no tracking.
Don’t take our word for it—review the code yourself. If you find issues or potential weaknesses, please report them via Issues or contact us privately if needed.
For Privacy-Conscious Users:
- When leveraging AI: If you use built-in browser AI assistants (like Gemini in Chrome or Copilot in Edge) for proofreading or summarization, your text is processed according to the respective provider's privacy policies. When handling highly sensitive or confidential information, please ensure the AI side panel is closed or disable the browser's page-context access.
- For maximum privacy: By using browsers without native AI integrations, such as Firefox or Brave, MD//WORKS acts as a 100% secure, offline-capable editor, completely eliminating any risk of unintended external data sharing.
The signature feature of MD//WORKS.
With Save as App, you can export your current document together with the full editor into a single .app.html file.
That file can be opened later in a browser — with your document already inside.
- One self-contained HTML file
- Works offline
- Portable via USB, email, or cloud storage
- No installation required
- Uses isolated autosave storage to avoid conflicts with the main editor
This makes MD//WORKS especially useful for internal sharing, field work, workshops, secure environments, and long-term document archiving.
- GitHub Flavored Markdown support
- One-click insertion for headings, bold, italic, lists, task lists, code blocks, links, tables, and horizontal rules
- Bulk task toggling across selected lines
- Clean monospace editor optimized for structured writing
- Visual highlights for tasks, search results, and spelling suggestions
It keeps Markdown visible and editable, while making common formatting tasks faster.
Preview your Markdown instantly as you write.
- Real-time rendering powered by
marked - Sanitized output with
DOMPurify - Styled headings, tables, code blocks, quotes, and task lists
- Scroll-synchronized editor and preview panes
- Adjustable split view
Perfect for checking structure, readability, and final output while drafting.
Long documents are easier to manage with the built-in outline panel.
- UI: Open or close via View › Outline.
- Supports headings from
#to#### - Jump instantly to any section
- Updates automatically while editing
- Useful for reports, manuals, articles, and release notes
Accidental edits happen. MD//WORKS helps you recover.
- UI: Accessible via File › History (Recent Files).
- Stores up to 10 recent document states in browser storage
- Captures opened files, saved files, and pre-close text states
- Restore previous versions from the History menu
- Autosave and recovery prompt help prevent data loss
A lightweight safety net for everyday writing.
Clean up messy Markdown with one click.
The built-in formatter helps keep documents consistent by:
- UI: Accessible via Edit › Format Markdown.
- Reducing excessive blank lines
- Adding missing spaces after heading markers
- Removing unnecessary trailing spaces
- Preserving valid Markdown line breaks
Useful when importing, pasting, or editing rough drafts.
Find and revise text quickly, even in long documents.
- Find and replace
- Replace all
- Regular expression support
- Case-sensitive search
- Whole-word matching
- Automatically jumps to the nearest match from the cursor
A practical editing tool for writers who handle structured documents.
MD//WORKS includes a lightweight English spell checker designed for Markdown documents.
- Inline spelling suggestions
- Ignores code, links, and Markdown formatting where possible
- Add words to a custom dictionary
- Ignore selected terms
- Background checking with visual wavy-line highlights
Best suited for English titles, abstracts, release notes, product copy, and bilingual documents.
When you need to focus, enter Zen Mode.
- UI: Accessible via View › Zen Mode.
- Hides menus, toolbar, status bar, and preview
- Centers the editor
- Creates a distraction-free writing space
- Exit instantly with the
Esckey
For drafting, thinking, and finishing.
MD//WORKS supports practical export formats for everyday use.
- Save as Markdown
.md - Export styled HTML
- Print or save as PDF
- Save as standalone
.app.html
MD//WORKS automatically detects your browser language and switches the interface accordingly.
- English UI
- Japanese UI
- Automatic release note display after updates
MD//WORKS runs in modern browsers such as Chrome, Edge, Firefox and Safari.
No installation required. Just open the HTML file and start writing.
Built for local, reliable writing.
- Autosave with recovery prompt
- Unsaved-changes warning
- Content Security Policy enabled
- Sanitized preview rendering
- Standalone files use separated local storage
Your writing stays local unless you choose to export or share it.
MD//WORKS is not trying to replace IDEs, knowledge bases, or collaborative writing platforms.
It occupies a different space: a focused, portable Markdown editor for people who want to write, protect, recover, and carry their work with minimal friction.
| Capability | VS Code | Obsidian | Typora | MD//WORKS |
|---|---|---|---|---|
| True portability / single-file app | ❌ | △ | ❌ | ✅ |
| Editor + document bundled together | ❌ | △ | ❌ | ✅ |
| Encrypted single-file export | ❌ | ❌ | ❌ | ✅ |
| Local-only encryption / no server required | △ | △ | △ | ✅ |
| Draft recovery & writing safety | △ | △ | ❌ | ✅ |
| Distraction-free writing | △ | △ | ○ | ✅ |
| Offline / restricted-environment usability | △ | ○ | ○ | ✅ |
| Plugin & extension ecosystem | ✅✅✅ | ✅✅ | △ | ❌ |
VS Code, Obsidian, and Typora are excellent tools, but they are built around different assumptions.
- VS Code is a powerful development environment.
- Obsidian is a knowledge base and note-linking system.
- Typora is a polished Markdown writing app.
- MD//WORKS is designed around a different idea:
write, protect, and carry your work as a single self-contained file.
With Save as App and Private App export, MD//WORKS turns a Markdown document into a portable HTML application.
The goal is not to add more complexity, but to make important writing easier to move, archive, reopen, and protect — without depending on a cloud service.
MD//WORKS is not:
- A plugin-based platform
- A knowledge graph system
- A code IDE
- A cloud collaboration editor
- A replacement for full publishing or layout software
These are deliberate design choices.
MD//WORKS focuses on being lightweight, portable, and safe for everyday writing — rather than becoming a large, highly customizable platform.
MD//WORKS is designed for:
- Writers drafting articles, technical documents, manuals, or manuscripts
- Engineers writing specs, RFCs, release notes, or design documents
- Researchers and business users converting Word drafts into clean Markdown
- Anyone who values portability, offline access, and draft recovery
- Users working in restricted environments where installation or cloud tools are difficult
It is especially useful when you want to open one file, write immediately, preview your work, and save the entire writing environment together with the document.
MD//WORKS may not be the best fit for users who need:
- Heavy customization through plugins
- Large multi-document knowledge bases
- Backlink graphs or personal knowledge management
- IDE-style development workflows
- Real-time collaborative editing
- Advanced desktop publishing features
For those workflows, tools like VS Code, Obsidian, Typora, or collaborative document platforms may be better suited.
MD//WORKS is intentionally simpler:
a focused Markdown writing workspace that can travel with your document.
MIT License