Supported File Formats
converter-epub.com converts your documents to EPUB using entirely browser-based processing. No files are uploaded — everything happens on your device.
Microsoft Word Document
The most common document format. converter-epub.com uses mammoth.js to extract text and formatting from your DOCX file, preserving paragraphs, headings, bold, italic, lists, and basic styling.
| Extension | .docx |
| MIME type | application/vnd.openxmlformats-officedocument.wordprocessingml.document |
| Preserved | Headings, bold, italic, lists, paragraphs |
HTML Web Page
Convert any HTML file to EPUB. Great for saving web articles, documentation, or scraped content for offline reading on your ereader.
| Extensions | .html, .htm |
| MIME type | text/html |
| Best for | Web articles, documentation, tutorials |
Plain Text
The universal format. Upload a plain text file and it will be converted to EPUB with each line wrapped in paragraph tags for clean reading.
| Extension | .txt |
| MIME type | text/plain |
| Encoding | UTF-8 (auto-detected) |
📋 Coming Soon
We plan to add support for these formats in future updates. For now, you can use Pandoc or Markitdown via the command line for Markdown-based conversion pipelines.