Features & Capabilities

This program shares the same parsing and rendering core engine with MarkText, the well-known open-source desktop Markdown editor: muya. The massive user base of MarkText guarantees the power and stability of the Muya engine.

1. Powerful & Intuitive Document Management

Tailored for local-first operations and high-frequency file handling, this online editor brings you these core data-flow features:

A Superfast File Import via Click or Drag & Drop

Click "Import File" in the sidebar to multi-select files, or select multiple .md/.markdown files from your device and drag and drop them onto the left sidebar to import them in batch.

B Auto-Save to Secure IndexedDB Local Database

Integrated with a hybrid auto-save algorithm (10s throttle + 1.5s debounce). While you write, the content is automatically saved to the browser's secure IndexedDB database, preserving your progress even if you refresh or go offline.

C Portable Document Library with Full-Text Search

Similar to macOS Notes, you can quickly rename documents, create duplicates, copy as Markdown/Rich Text, or delete them. The top search input supports multi-keyword filtering to search through a large notes library.

2. Advanced Formatting & Rendering Capabilities

Powered by the Muya parser, the editor achieves desktop-grade rendering, giving creators an incredibly smooth typesetting experience:

📝 CommonMark & GFM Block Syntax Support

Perfectly compatible with GFM (GitHub Flavored Markdown) block-level syntax, including headings, lists, versatile code blocks, tables, blockquotes, raw HTML blocks, and images. Built on CommonMark 0.31 and GFM 0.29 specifications.

🛠️ Inline Format Formatting Toolbar

No need to memorize hotkeys. Simply highlight text to trigger the floating inline toolbar to quickly set bold, italic, underline, strikethrough, inline code, inline formulas, footnotes, and superscripts/subscripts.

⚓ End-to-End Back-Referencing Footnotes

Supports [^id] citations and [^id]: definition. It provides interactive tooltip bubbles in editing mode and automatically generates dual-direction back-referencing anchors upon exporting to HTML/PDF.

🔗 Reference Links & Reference Images

Supports reference links [text][ref] and reference images ![alt][ref]. The engine maps these to [ref]: url "title" at the bottom, keeping your Markdown sources clean and readable.

🔢 Code Block Line Numbers

Code blocks natively render side line numbers (can be enabled via settings as codeBlockLineNumbers), allowing code lines to be aligned and reviewed easily.

📊 Rich Media & Advanced Diagrams

Integrates multiple top-tier rendering components to transform your plain text Markdown into a media-rich masterpiece:

KaTeX Math Formulas: Typesets complex equations with high performance and print-grade rendering.
Mermaid Diagrams: Draw flowcharts, sequence diagrams, state diagrams, gantt charts, and more.
Vega / Vega-Lite: Embed interactive line, bar, or scatter data charts directly in Markdown using JSON configurations.
PlantUML: Renders object-oriented class diagrams and system architecture graphs.

3. Formatting & Format Conversion Toolbox

Beyond writing, the editor comes with format converters to bridge the gap between Markdown and other applications:

1 Batch File Import

Import multiple .md/.markdown files at once. You can select them in the file picker, or drag and drop multiple documents onto the left sidebar to process them in batch.

2 Batch Export to ZIP Archive

As your local documents grow, there is no need to save them one by one. Click "Batch Export" at the top of the sidebar list to download all documents in a standard ZIP archive as a backup.

3 Convert Markdown to HD Long Image (PNG/JPG)

Export formatted articles as PNG (with transparency) or JPG long images. The background engine renders the content with pixel-perfect resolution, creating high-quality images ready for blogs, newsletters, or social media. For a detailed guide, refer to: Markdown to JPG/PNG Image →

4 Convert Markdown to High-Quality PDF

Export standard, print-ready PDF files. Optimized CSS rules eliminate layout glitches or browser UI artifacts. Renders KaTeX, Mermaid diagrams, Prism code blocks, and footnotes perfectly. Ideal for offline reading or printing. For details, refer to: Markdown to PDF Export Guide →

5 Convert Markdown to Offline HTML Webpage

Export your active document as a standalone offline HTML file. It packs all styles and layout configurations, allowing anyone to open it in any browser offline with identical looks. For details, refer to: Markdown to HTML Webpage →

6 Copy Rendered Layout (Keep Formatting on Paste)

Click the Copy dropdown menu and choose Copy Rich Text Content. The system will copy the rendered rich text to your clipboard. Simply paste it (Ctrl+V) into Word, WPS, or blog editors to keep formatting like headers, bold text, and lists.

7 One-Click Dark/Light Theme Switching

Fully optimized for both light theme and dark mode. Click the sun/moon icon in the header to switch. The themes adapt background colors, sidebar elements, code syntax highlighting, tables, Mermaid diagrams, and dialog boxes, protecting your eyes in dark environments.

8 Auto-Save Protection with IndexedDB

Silent background auto-saving to IndexedDB prevents data loss from accidental tab closure. The green "Saved" toast gives you instant reassurance while writing.