oDoc

A clean, fast, single-file document reader & editor.
No install. No account. No cloud. Just open and read.

→ Open oDoc · Report Bug · Request Feature

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What is oDoc?

oDoc is a single HTML file that lets you open, read, and edit documents — right in your browser. No server required, no sign-up, no data ever leaves your device. Download the file once and use it forever, even offline.

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✨ Features

• Multi-format support — Open .md, .txt, .html, .pdf, and .epub files
• Live Markdown preview — Renders headings, code blocks, tables, blockquotes, and more
• Edit mode — Switch to a raw text editor at any time; edits update the preview in real time
• Drag & drop — Drop files anywhere on the window to open them instantly
• Download — Save edited files back to your device
• Dark theme — Easy on the eyes, always
• Zero dependencies at runtime — Ships with PDF.js and JSZip via CDN; works offline with a local copy
• Single file — The entire app is one .html file you can bookmark, share, or self-host

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🚀 Getting Started

Option 1 — Just open it

Download oDoc.html and open it in any modern browser. That's it.

# Clone the repo
git clone https://github.com/oDoc/oDoc.git

# Open in your browser
open oDoc/oDoc.html

Option 2 — Self-host

Drop oDoc.html on any static host (GitHub Pages, Netlify, Vercel, your own server):

# GitHub Pages example
git clone https://github.com/oDoc/oDoc.git
cd oDoc
# Push to a gh-pages branch or configure Pages to serve from main

Option 3 — Use the live demo

Visit ODoc — no download needed.

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📄 Supported Formats

Format	Extension	Notes
Markdown	.md, .markdown	Full preview with GFM-style rendering
Plain text	.txt	Displayed in a monospace editor
HTML	.html, .htm	Sanitized preview (scripts stripped)
PDF	.pdf	Text extraction via PDF.js
EPUB	.epub	Text extraction via JSZip

Unsupported formats (.docx, .csv, .psd, .zip, etc.) are intentionally excluded to keep the app focused and secure.

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🖥 Interface

┌─────────────────┬──────────────────────────────────────┐
│  Sidebar        │  Header (filename · type · size)     │
│  ─────────────  │  ─────────────────────────────────── │
│  + Add Files    │  [ Preview ]  [ Edit ]               │
│                 │                                      │
│  📝 readme.md   │  Rendered document content           │
│  📕 report.pdf  │  or raw text editor                  │
│  📖 book.epub   │                                      │
│                 │                                      │
└─────────────────┴──────────────────────────────────────┘

• Sidebar — file list with icons, sizes, and one-click remove
• Preview tab — rendered output (Markdown, HTML) or plain text
• Edit tab — raw text editor; changes sync to preview instantly
• Download button — saves the current (possibly edited) file
• Drag & drop — drop files anywhere to add them

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🔒 Privacy

oDoc processes everything locally in your browser.

• No files are uploaded to any server
• No analytics or tracking
• No cookies or local storage used
• Works fully offline once the page is loaded

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🛠 Development

The entire app lives in a single file — oDoc.html. There is no build step.

git clone https://github.com/oDoc/oDoc.git
cd oDoc

# Edit the file
code oDoc.html

# Test in browser
open oDoc.html

External libraries loaded via CDN (swap for local copies if you need offline-first):

Library	Version	Purpose
PDF.js	3.11.174	PDF text extraction
JSZip	3.10.1	EPUB parsing

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🤝 Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/my-feature)
3. Commit your changes (git commit -m 'Add my feature')
4. Push to the branch (git push origin feature/my-feature)
5. Open a Pull Request

For bugs or ideas, open an issue.

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📜 License

Released under the MIT License. Free to use, modify, and distribute.

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Made with ☕ · oDoc