Word to PDF API

If you want a Word to PDF API, there are a few good options depending on whether you want a cloud API, self-hosted library, or a simple code example.

Popular Word to PDF API options

1. Cloud APIs

These are easiest to use:

• Aspose.Words Cloud

  • Converts DOC/DOCX to PDF
  • Good formatting fidelity
  • REST API available

• Cloudmersive Document Conversion API

  • Simple REST API
  • Supports Word to PDF conversion

• PDF.co

  • Has document conversion endpoints
  • Easy integration

• Zamzar API

  • File conversion service
  • Supports Word to PDF

2. Self-hosted / SDK-based

If you want to run conversion in your own app/server:

• LibreOffice headless

  • Free and open source
  • Can convert DOCX to PDF locally

• Aspose.Words for .NET / Java / Python

  • Library-based conversion
  • High fidelity, paid commercial license

• docx2pdf

  • Simple Python tool
  • Works well on Windows/macOS using MS Word

Example API flow

Typical Word to PDF API usage:

1. Upload .docx
2. Call conversion endpoint
3. Receive .pdf file or download link

Example using Aspose Cloud-style REST

curl -X POST "https://api.aspose.cloud/v4.0/words/convert?format=pdf" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -F "document=@input.docx" \
  -o output.pdf

If you want to build your own API

You can create a small service in:

• Node.js with LibreOffice
• Python FastAPI with python-docx + LibreOffice
• .NET with Aspose or Office automation alternatives

If you want, I can also give you:

1. a ready-to-use Word to PDF API list,
2. a sample API implementation in Python/Node.js, or
3. a comparison table of the best services.