DOCX to HTML Converter
Convert Word DOCX documents to clean HTML. Preserves headings, paragraphs, bold, lists, and images as base64. Output as full page or fragment.
Drop DOCX files here
or click to select · up to 20 files · max 50 MB each
Files never leave your device — processed locally in your browser
What it does
Semantic HTML output
Headings become <h1>–<h6>, bold becomes <strong>, italic becomes <em>, lists become <ul>/<ol>.
Image preservation
Images embedded in DOCX are converted to base64 data URIs and inlined in the HTML output.
Full page vs fragment
Choose between a full HTML document (with <!DOCTYPE>, <head>, <body>) or just the content fragment for CMS insertion.
Inline or external styles
Output with inline styles or with a separate CSS class-based approach for easier customization.
No upload
mammoth.js converts the DOCX locally in your browser.
How to use DOCX to HTML Converter
- 1Upload DOCX
Drop your .docx file onto the zone.
- 2Choose output settings
Select full page vs fragment, inline vs external styles.
- 3Convert and copy/download
Click "Convert to HTML". Copy the HTML to clipboard or download as an .html file.
When to use this
Publishing blog posts from Word
Write in Word, export to HTML, paste directly into your CMS or website HTML editor.
CMS migration
Batch-convert a library of DOCX documents to HTML for import into WordPress, Contentful, or a custom CMS.
Email template creation
Convert a Word-formatted newsletter to HTML for use in email marketing platforms.
Common errors & fixes
- Complex layout lost
- Multi-column layouts, text boxes, and advanced formatting cannot be converted to semantic HTML. Use a layout-preserving tool for complex documents.
- HTML looks unstyled
- The output is semantic HTML without decorative CSS. Apply your own CSS to match your website or CMS theme.
Technical details
| Input format | DOCX (Office Open XML) |
| Output format | HTML (semantic, inline or class-based styles) |
| Parsing library | mammoth.js |
| Image handling | Base64 data URIs embedded in <img> tags |
| Processing location | Browser (client-side only) |
What is DOCX?
DOCX is the XML-based Microsoft Word format — an ISO standard (OOXML) used globally for word processing. Its internal structure is a ZIP containing XML documents describing the text, styles, and images. Tools like mammoth.js can parse this structure to extract clean HTML output.
What is HTML?
HTML (HyperText Markup Language) is the markup language of the web. Unlike the fixed layout of DOCX or PDF, HTML is fluid and adapts to screen sizes. It is the native format for web pages, CMS content, and email templates.
Converting DOCX to HTML bridges the gap between word processing and web publishing — writers can work in familiar Word tools and publish directly to the web.
DOCX to HTML conversion: What to expect
mammoth.js converts DOCX to semantic HTML with high fidelity for common document elements: body text, headings (H1–H6), bold, italic, underline, bullet and numbered lists, hyperlinks, and inline images.
Complex DOCX features that do not map cleanly to HTML — floating text boxes, columns, custom styles, nested tables — may be partially or completely lost. Always review the HTML output before publishing.
Frequently Asked Questions
What is a DOCX file?
- DOCX is the Microsoft Word document format based on XML, standardized as OOXML. It is the most widely used word processing format globally.
How do I convert DOCX to HTML?
- Upload your .docx file above and click "Convert to HTML". Choose output settings (full page or fragment), then copy to clipboard or download.
Is this DOCX to HTML converter free?
- Yes, completely free.
Does the converter upload my files?
- No — mammoth.js parses the DOCX entirely in your browser.
Are images preserved in the HTML output?
- Yes. Images are embedded as base64 data URIs in <img> tags.
What formatting is preserved?
- Headings, paragraphs, bold, italic, bullet/numbered lists, hyperlinks, and images. Multi-column layouts and floating elements are not preserved.
Can I use the output in WordPress or other CMS?
- Yes. Select the "fragment" output to get just the content HTML without the <!DOCTYPE> wrapper, then paste directly into your CMS HTML editor.
Does it work on mobile?
- Yes.
Related Tools
DOCX to PDF Converter
Convert Word DOCX files to PDF in your browser. Preserves headings, bold, lists, and images. No upload, no account, no size limits. Free and private.
DOCX to TXT Converter
Extract plain text from Word DOCX files. Strips all formatting and returns clean UTF-8 text. Batch support, configurable line breaks. Free, browser-based.
Word Counter
Real-time character, word, and paragraph analysis.
Image to PDF
Convert JPG, PNG, WebP, and other images to PDF — batch convert and combine in your browser.