Markdown → PDF Converter

An offline web app to convert Markdown to PDF. Runs locally and does not depend on external services.

Features

• ✅ Fully offline
• ✅ Live Markdown preview
• ✅ PDF export without the print dialog
• ✅ GitHub-style look
• ✅ Keyboard shortcuts (Ctrl+S, Ctrl+P)
• ✅ Drag & drop support for .md files
• ✅ Custom filename input
• ✅ Animated drag & drop overlay with visual feedback

Usage

Local

1. Start the local server:

python3 local.py --port 8000

2. Open in your browser: http://localhost:8000/

Usage

Buttons

• Open .md — load a Markdown file from your computer
• Save .md — save the current text as a .md file
• Save as PDF — generate and download a PDF

Drag & Drop

• Drag a .md file anywhere on the page to load it instantly
• The overlay will appear with visual feedback when dragging

Custom Filename

• Enter a custom filename in the input field before saving
• The extension (.md or .pdf) will be added automatically

Tech

• Vanilla JavaScript
• Marked.js for Markdown rendering
• html2pdf.js for PDF generation
• DOMPurify for sanitization

API

REST API Endpoint

POST /api/convert - Convert Markdown to PDF

The API accepts Markdown content and returns a PDF file. It supports CORS and can be called from any origin.

Request Formats

1. JSON: Send {"markdown": "...", "filename": "..."}
2. File Upload: Upload a .md file via multipart/form-data
3. Plain Text: Send Markdown as text/plain

Example

curl -X POST http://localhost:8000/api/convert \
  -H "Content-Type: application/json" \
  -d '{"markdown": "# Hello\n\nWorld", "filename": "test"}' \
  --output output.pdf

See API.md for complete API documentation.

Installation for API

To use the API features, install dependencies:

pip install -r requirements.txt

The API requires:

• markdown - Markdown parsing
• weasyprint - PDF generation