MDisBetter vs Mammoth.js — Word to Markdown Compared
Mammoth.js is the open-source JavaScript library that converts .docx to HTML and Markdown — semantic-style mapping (Word styles → output styles), MIT-licensed, and the engine many web converters quietly run under the hood. MDisBetter is a hosted web tool: no code, no install, but also no flexibility to customise the mapping. Different products entirely — library vs. tool — that come up in the same comparison because both convert Word.
| Feature | MDisBetter | Mammoth.js |
|---|---|---|
| DOCX → Markdown | ✓ | ✓ |
| Open-source / MIT-licensed | ✕ | ✓ |
| JavaScript library (Node + browser) | ✕ | ✓ |
| Custom style mapping | ✕ | ✓ |
| No-code web UI | ✓ | ✕ |
| Local privacy (run in your own code) | ✕ | ✓ |
| Other input formats | PDF, URL, audio, video + 20 tools | DOCX-only |
| Free | Free tier, no signup | Free (open-source, MIT) |
Frequently asked questions
Should I just use Mammoth.js directly?
If you are a JavaScript developer doing repeated conversions or building a feature into your own product, yes — Mammoth is the right primitive. It is free, MIT-licensed, and gives you full control over the style mapping. Hosted tools wrap it; if you can wrap it yourself, you save a hop.
Does MDisBetter use Mammoth under the hood?
We do not publish our internal stack, but Mammoth is a common engine choice in the Word→Markdown space. The honest answer: many web converters use it and you get a similar quality floor whether or not it is the engine.
When does Mammoth's custom style mapping matter?
When your organisation uses a custom Word template with non-standard styles ("CompanyHeading1", "RegulatoryBody") that you want mapped to specific Markdown output. Hosted tools do generic mapping; Mammoth lets you write the rules.
Output quality vs Mammoth?
Quality is comparable on clean modern Word documents. Mammoth's edge is configurability for non-standard documents; ours is convenience for standard ones.
Pricing?
Mammoth is free open-source (MIT). MDisBetter has a free tier without signup; Pro at ~$10/month covers the broader 20-tool suite. For pure Word conversion, Mammoth is free forever — if you can write the integration code.