Markdown Viewer by xicilion

Markdown Viewer

Markdown to perfect Word in one click — Mermaid, Graphviz, Vega, Infographic, LaTeX (editable), code highlighting, local processing

Completely Free · 18+ Professional Themes · 28 Languages Support



You love writing in Markdown — clean, efficient, version control friendly.
But eventually, you always need a Word document.

The old nightmare:

😫 Manual screenshot flowcharts · Copy-paste formulas become messy · Format code by hand · Adjust tables cell by cell · Spend another 30 minutes tweaking fonts, spacing, and colors after export

One document: 1 hour writing, 2 hours formatting.



Now it takes just 1 second.

Click to download and get a perfect Word document:
- ✅ Mermaid diagrams → High-resolution images
- ✅ Graphviz DOT graphs → High-resolution images
- ✅ LaTeX formulas → Word editable equations
- ✅ Auto syntax highlighting (100+ languages)
- ✅ 18+ professional themes with one click
- ✅ Completely free, local processing

Spend time on writing, not on formatting.



💫 See It in Action

Technical Documentation: 15 Flowcharts, 2 Hours → 5 Minutes

Before: draw.io diagram → Export PNG → Insert into Word → Resize → Repeat 15 times = 2 hours

Now: Write Mermaid code → Click download = 5 minutes

System Architecture

```mermaid
graph TB
A[User] --> B[Load Balancer]
B --> C[Server 1]
B --> D[Server 2]
```


Need changes? Modify code and re-export. Save 115 minutes.

Academic Paper: 50+ Formulas, 3 Hours → 10 Minutes

Before: Word equation editor one by one OR paid tool subscription = 3 hours + Paid subscription

Now: Write LaTeX syntax directly → Click download = 10 minutes + Free

Given mass $m$ and acceleration $a$, according to Newton's second law:

$$
F = ma = m\frac{dv}{dt} = m\frac{d^2x}{dt^2}
$$


Export as native Word format, fully editable. Not an image, but a real equation object.

Team Collaboration: Weekly Reports, 1 Hour → 1 Minute

Before: Copy content → Set format → Adjust lists → Add styling → Excel charts + screenshots = 1 hour weekly

Now: Open file → Choose theme → Click download = 1 minute

Choose "Business" theme, Vega-Lite data charts auto-convert to high-res images, professional look. Save 59 minutes weekly.

Business use cases:
- 📊 Sales trends (line charts)
- 📈 Market share comparison (bar charts)
- 🎯 KPI achievement (gauges)
- 📉 Cost analysis (stacked charts)

Let data speak, generate professional reports with one click.



🎯 Three Core Features

1. Automatic Diagram Conversion

Mermaid Diagrams · Graphviz DOT · Vega/Vega-Lite Data Charts · Infographic · SVG images · Complex HTML tables

Mermaid: Flowcharts, sequence diagrams, class diagrams, state diagrams → Technical docs, architecture design
Graphviz DOT: Directed/undirected graphs, network topology, state machines → System architecture, dependency analysis
Vega/Vega-Lite: Bar charts, line charts, scatter plots, heatmaps → Business reports, data analytics
Infographic: Statistical charts, infographics, data visualization → Data presentation, visual storytelling

Time comparison: Complex sequence diagram (10 objects)
- Traditional tools: Draw 30min + Modify 20min + Adjust 10min + Export 5min = 65 minutes
- Markdown Viewer: Write code 5min + Modify 30sec + Export 1sec = 6 minutes

Business scenario: Quarterly sales report (5 bar charts)
- Excel charting + screenshots: Select data 15min + Format 10min + Screenshot 5min = 30 minutes
- Vega-Lite: JSON data 2min + One-click export = 3 minutes

Precise, professional, reusable.

2. Perfect Formula Conversion

LaTeX → Word editable equations (not images!)

After export, you can:
- ✅ Continue editing in Word
- ✅ Adjust font size
- ✅ Modify symbols and variables
- ✅ Copy to other documents

One formula, two approaches:
- ❌ Word equation editor: Click...click...click...select symbols...adjust positions
- ✅ LaTeX: \int_0^\infty e^{-x^2}dx Done

3. 18+ Professional Themes

Different scenarios, different styles, one-click switch:

• 📊 Business / Technical → Business reports, technical docs
• 📚 Academic / Palatino → Academic papers, book typesetting
• 🇨🇳 Songti / Heiti / Mixed → Chinese documents
• 🎨 Typewriter / Sakura → Creative content

WYSIWYG: Preview looks exactly like exported Word. No guessing, no trial.

No more manual adjustments: Font, size, line spacing, paragraph spacing, code background...



⚡ Lightning Fast Experience

Smart Cache: First Time 5s, Second Time 1s

Document with 50 Mermaid diagrams:
- First open: Text displays instantly, diagrams render in background, all done within 5s
- Second open: Load from cache, instant display (<1s)
- Text modified: Still instant (diagrams from cache)
- Diagram modified: Only re-render changed diagrams

10x faster than Word, 100x smaller files.

Reading Enhancement

• Three layouts: Normal (1000px) / Full screen / Narrow (530px, preview Word effect)
• Flexible zoom: 50%-400%, shortcuts Ctrl/Cmd + - 0
• Smart TOC: Auto-extract headings, sidebar navigation, Ctrl/Cmd + B to toggle
• Position memory: Auto-save scroll position, continue reading next time
• History: Track recently opened documents

🚀 Quick Start - 3 Steps

Step 1: Install Extension (30 seconds)

1. Open Firefox browser
2. Visit Firefox Add-ons Store
3. Search "Markdown Viewer"
4. Click "Add to Firefox"
5. ✅ Installation complete

Step 2: Use with Local Files (1 minute)

To open local .md files:

1. Open about:addons in Firefox
2. Find Markdown Viewer and click "Preferences" or "Options"
3. Enable "Allow access to file URLs" if available
4. ✅ Now you can open local Markdown files with Firefox

Alternative: Drag and drop .md files directly into Firefox window

Not needed if:
- Only viewing online docs (GitHub, blogs, etc.)
- Using browser's "Open File" function

Quick Start

Open documents: Drag .md files to Firefox · Or right-click → Open with → Markdown Viewer · GitHub docs auto-rendered

Export to Word: Click download button or Ctrl + S → See progress → Auto-save

Switch themes: Click toolbar → Choose theme → Apply instantly

Adjust view: Ctrl + + / Ctrl + - zoom · Layout switch · Ctrl + B TOC



🎁 Complete Features

Full Markdown Syntax Support

Headings · Paragraphs · Bold · Italic · Strikethrough · Lists · Task lists · Blockquotes · Code blocks (100+ languages highlighted) · Tables · Links · Images · Mermaid diagrams · Vega / Vega-Lite charts · Infographic charts · LaTeX formulas · HTML · GFM extensions

18 Themes

Business: Default · Business · Technical
Academic: Academic
Serif: Palatino · Garamond · Cambria · Elegant
Sans-serif: Verdana · Trebuchet · Century
Chinese: Songti · Heiti · Mixed
Creative: Typewriter · Sakura · Water · Minimal

28 Interface Languages

English · 简体中文 · 繁體中文 · Русский · 日本語 · हिन्दी · 한국어 · Deutsch · Português (Brasil) · Português (Portugal) · Nederlands · Українська · Tiếng Việt · Беларуская · Français · Italiano · Bahasa Indonesia · Español · ไทย · Svenska · Türkçe · Eesti · Bahasa Melayu · Polski · Suomi · Lietuvių · Norsk · Dansk



💎 Competitive Advantages

| | Manual Screenshots | CLI Tools | Online Services | Desktop Editors | Markdown Viewer |
|---|:---:|:---:|:---:|:---:|:---:|
| Ease of Use | Tedious | Setup needed | Upload needed | Install needed | ✅ One-click |
| Mermaid | Manual screenshot | Plugin needed | ✅ Supported | ✅ Supported | ✅ Native support |
| Math Formulas | Images | Images | Images | Images | ✅ Editable |
| Privacy | ✅ Local | ✅ Local | ❌ Cloud upload | ✅ Local | ✅ Local |
| Themes | - | - | 3-5 | 5-10 | ✅ 18+ |
| Offline | ✅ | ✅ | ❌ | ✅ | ✅ |
| GitHub Direct View | ❌ | ❌ | ❌ | ❌ | ✅ |
| Price | Free | Free | Paid plans | Paid plans | ✅ Free |

Core advantage: Faster, cheaper, safer, more powerful.



❓ FAQ

Q: Can I edit the exported Word document?
A: Yes. Standard .docx format, math formulas are editable, not images.

Q: Which diagrams are supported?
A: All Mermaid diagrams (flowchart, sequence, gantt, class, state, pie, ER, etc.), Vega / Vega-Lite data visualization charts, Infographic statistical charts + SVG auto-conversion.

Q: Is there a file size limit?
A: No limit. Smart cache, documents with 100+ diagrams open instantly.

Q: Does it require internet?
A: No. Completely local processing, works offline.

Q: Will my documents be uploaded?
A: Never. All processing happens locally.

Q: How to switch themes?
A: Click toolbar icon → Select theme → Apply instantly.

Q: Can I customize themes?
A: Currently 18 preset themes, customization coming soon.

Q: Will large documents lag?
A: No. Progressive loading + smart cache, text displays instantly, diagrams render in background (first 5s, second 1s).

Q: Does cache take up much space?
A: Default max 1000 items, approximately 500 MB, adjustable or clearable in settings.

Q: Which browsers are supported?
A: Firefox 78 and above.

Q: Which Word versions can open the exported file?
A: Word 2016+ fully supported, Word 2013 also works. Fully compatible with WPS Office.

Q: Can I export to PDF?
A: Currently Word only, PDF planned. You can export to Word then save as PDF.

Q: Which theme suits me?
A: Business reports → Business · Academic papers → Academic · Technical docs → Technical · Chinese docs → Songti/Mixed

Q: What's the difference between Vega and Mermaid?
A: Mermaid is for flowcharts, architecture diagrams, and other schematic diagrams; Vega/Vega-Lite is for data visualization like sales charts, financial reports, and other data-driven business charts. They complement each other for different scenarios.

Q: How to create charts with Vega-Lite?
A: Use ```vega-lite code block in Markdown with JSON format chart specification. See Vega-Lite official examples.



🔒 Privacy Commitment

• ✅ All processing done locally, never uploaded
• ✅ No tracking, no personal data collection
• ✅ Open source code, auditable and transparent
• ✅ Chrome Web Store security approved (Manifest V3)

Your privacy is 100% protected.



🆘 Get Help

📖 Full Documentation · 🐛 Report Issues · 💡 Feature Requests · ⭐ GitHub Star



🎉 Get Started Now

Install in 30 seconds, start using immediately:

1. Visit Firefox Add-ons → Search "Markdown Viewer"
2. Click "Add to Firefox"
3. Drag .md files into Firefox window
4. ✅ Start using

You'll get: Markdown → Word one-click conversion · Mermaid auto-convert · LaTeX editable formulas · 100+ languages syntax highlighting · 18+ themes · Smart cache · Completely free

Perfect for: Technical writers · Students/researchers · Product managers · Developers · Anyone using Markdown



📜 Open Source License

This project is open source under ISC license. Welcome to Star, report issues, suggest features, and contribute code.

Project URL: https://github.com/xicilion/markdown-viewer-extension



Stop wasting time on formatting

Focus on writing, let Markdown Viewer handle everything else