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Convert documents between formats using SuperDoc’s high-fidelity conversion engine.

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Usage

import Casedev from 'casedev';

const client = new Casedev({ apiKey: 'sk_case_YOUR_API_KEY' });

// Using file upload
const pdf = await client.superdoc.v1.convert({
  file: documentFile,
  from: 'docx',
  to: 'pdf'
});

// Using base64
const docx = await client.superdoc.v1.convert({
  document_base64: Buffer.from(markdownContent).toString('base64'),
  from: 'md',
  to: 'docx'
});

// Using URL
const result = await client.superdoc.v1.convert({
  document_url: 'https://example.com/document.docx',
  from: 'docx',
  to: 'pdf'
});

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Parameters

ParameterTypeRequiredDescription
fileFileOne ofDocument file (multipart upload)
document_urlstringOne ofURL to fetch document from
document_base64stringOne ofBase64-encoded document content
fromstringYesSource format: docx, md, html
tostringNoTarget format: pdf, docx. Default: pdf

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Supported conversions

FromToNotes
docxpdfFull fidelity conversion
mddocxConverts Markdown to Word
mdpdfMarkdown to PDF (via DOCX)
htmldocxHTML content to Word

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Response

Returns the converted document as binary data with appropriate content type:
  • application/pdf for PDF output
  • application/vnd.openxmlformats-officedocument.wordprocessingml.document for DOCX output

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Examples

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Convert uploaded file

// Express/Next.js file upload handler
export async function POST(request: Request) {
  const formData = await request.formData();
  const file = formData.get('file') as File;

  const pdf = await client.superdoc.v1.convert({
    file: file,
    from: 'docx',
    to: 'pdf'
  });

  return new Response(pdf, {
    headers: {
      'Content-Type': 'application/pdf',
      'Content-Disposition': 'attachment; filename="converted.pdf"'
    }
  });
}

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Generate Word doc from Markdown

const markdown = `
# Quarterly Report

## Executive Summary
Revenue increased by 15% compared to Q3...

## Key Metrics
| Metric | Value |
|--------|-------|
| Revenue | $1.2M |
| Growth | 15% |
`;

const docx = await client.superdoc.v1.convert({
  document_base64: Buffer.from(markdown).toString('base64'),
  from: 'md',
  to: 'docx'
});

fs.writeFileSync('report.docx', docx);

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Limits

LimitValue
Max file size25 MB
Concurrent requests10 per API key