html-docx-js vs html-to-docx: Architecture, Maintenance, and Feature Support

Generating Word documents from HTML is a common requirement in enterprise web applications — think invoices, reports, or exportable content. Two popular npm packages tackle this problem: html-docx-js and html-to-docx. While they sound similar, they are not interchangeable. One is a legacy library that has stalled, while the other is the modern standard. Let's dive into the technical realities.

🛠️ Maintenance Status: Archived vs Active

html-docx-js is effectively archived.

• The repository has seen little to no activity in recent years.
• Issues and pull requests often go unanswered.
• It relies on older dependencies that may conflict with modern build tools.

// html-docx-js: Basic usage (legacy)
const htmlDocx = require('html-docx-js');
const converted = htmlDocx.asBlob('<h1>Hello World</h1>');
// No support for advanced options like headers/footers in recent versions

html-to-docx is actively maintained.

• Regular updates address bugs and add CSS support.
• The maintainers respond to issues and accept community contributions.
• It keeps dependencies up-to-date, reducing security risks.

// html-to-docx: Basic usage (modern)
const HTMLtoDOCX = require('html-to-docx');

const fileBuffer = await HTMLtoDOCX('<h1>Hello World</h1>', null, {
  table: { row: { cantSplit: true } }
});
// Supports extensive configuration options

🎨 CSS and Styling Support

html-docx-js has limited CSS parsing.

• It handles basic tags like <b>, <i>, and <p>.
• Complex layouts, flexbox, or modern CSS properties often break or get ignored.
• Images require base64 encoding and can be unreliable.

// html-docx-js: Styling limitations
const html = '<div style="display: flex; color: #333;">Content</div>';
const blob = htmlDocx.asBlob(html);
// Flexbox will likely be ignored; output may look broken

html-to-docx supports a wider range of CSS.

• It maps many CSS properties to WordML styles correctly.
• Tables, margins, and font families render more consistently.
• Image handling is more robust, supporting remote URLs and buffers.

// html-to-docx: Better styling support
const html = '<table style="border-collapse: collapse;"><tr><td>Cell</td></tr></table>';
const buffer = await HTMLtoDOCX(html, null, {
  footer: '<p>Page {PAGE}</p>'
});
// Tables and borders render correctly in most Word versions

📄 Document Structure: Headers, Footers, and Pages

html-docx-js lacks built-in support for complex document structures.

• Adding headers or footers requires hacking the internal XML.
• Page breaks are often inconsistent.
• Not suitable for formal documents requiring specific layouts.

// html-docx-js: No native header/footer API
// Developers often have to modify the generated blob manually
// which is error-prone and brittle
const blob = htmlDocx.asBlob(content);
// No config option for headers/footers

html-to-docx provides explicit configuration for document parts.

• You can define headers, footers, and page numbers via options.
• Page orientation (landscape/portrait) is configurable.
• Ideal for professional reports needing consistent branding.

// html-to-docx: Native header/footer support
const buffer = await HTMLtoDOCX(html, null, {
  header: '<p>Company Confidential</p>',
  footer: '<p>Page {PAGE} of {NUMPAGES}</p>',
  orientation: 'landscape'
});
// Structured document parts are handled automatically

🌐 Environment Compatibility: Node vs Browser

html-docx-js was originally built with Node.js in mind.

• Browser usage requires polyfills for Buffer and Blob.
• Can cause bundling issues with Webpack or Vite without extra config.
• Less ergonomic for frontend-heavy applications.

// html-docx-js: Browser bundling issues
// May require webpack config to handle Node core modules
import htmlDocx from 'html-docx-js';
// Often needs global.Buffer polyfill

html-to-docx is designed for universal usage.

• Works out-of-the-box in Node.js and modern browsers.
• Handles binary data conversion internally without extra polyfills.
• Easier to integrate into React, Vue, or Angular apps.

// html-to-docx: Universal compatibility
import HTMLtoDOCX from 'html-to-docx';
// Works in browser without extra Buffer polyfills
const blob = await HTMLtoDOCX(html, null, { fileType: 'blob' });

🤝 Similarities: Shared Ground

Despite the differences, both libraries aim to solve the same problem using similar underlying concepts.

1. 📝 HTML Input

• Both accept HTML strings as the primary input format.
• Neither renders JavaScript — they parse static HTML only.

// Both accept HTML strings
const html = '<h1>Title</h1><p>Content</p>';
// html-docx-js
htmlDocx.asBlob(html);
// html-to-docx
HTMLtoDOCX(html);

2. 📦 Output Format

• Both generate .docx files compatible with Microsoft Word.
• Output can be converted to Blobs, Buffers, or Base64 depending on config.

// Both produce Word-compatible files
// html-docx-js returns a Blob by default
// html-to-docx can return Buffer or Blob via options

3. 🔗 Dependency on WordML

• Both libraries construct Office Open XML (WordML) under the hood.
• They abstract the complex XML structure so you don't have to write it manually.

// Both abstract WordML complexity
// You write HTML, they generate XML inside the .docx zip

📊 Summary: Key Differences

💡 The Big Picture

html-docx-js is a legacy tool 🕰️. It might work for simple, internal tools where formatting doesn't matter and you're stuck on an old stack. However, using it in 2024+ introduces technical debt. It lacks the features modern users expect (like proper headers, footers, and CSS fidelity) and carries the risk of unmaintained dependencies.

html-to-docx is the production-ready choice 🏭. It handles the edge cases that actually matter in business applications — page breaks, branding in headers, and consistent table rendering. The API is slightly more verbose but offers the control you need for professional documents. It works everywhere (Node and browser) without fighting your bundler.

Final Thought: If you are starting a new feature or project, do not use html-docx-js. The time saved initially will be lost debugging formatting issues later. html-to-docx is the clear architectural choice for stability and quality.