SuperDoc Overview

Convert documents between formats and populate DOCX templates with data

SuperDoc provides document conversion and template automation. Convert between DOCX, PDF, Markdown, and HTML formats, or populate DOCX templates with dynamic data.

Quick example

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

// Convert Markdown to PDF
const pdf = await client.superdoc.v1.convert({
  file: markdownFile,
  from: 'md',
  to: 'pdf'
});

// Convert DOCX to PDF
const converted = await client.superdoc.v1.convert({
  file: docxFile,
  from: 'docx',
  to: 'pdf'
});

Capabilities

Feature	Description
Format Conversion	Convert between DOCX, PDF, Markdown, and HTML
Template Annotation	Populate DOCX templates with dynamic field data
High Fidelity	Preserves complex formatting, tables, and styles
Multiple Input Methods	Upload files, provide URLs, or send base64-encoded content

Supported conversions

From	To	Use Case
docx	pdf	Finalize Word documents for distribution
md	docx	Generate editable Word docs from Markdown
md	pdf	Create PDFs directly from Markdown content
html	docx	Convert web content to Word format

Endpoints

Convert

POST /superdoc/v1/convert — Convert documents between formats

Annotate

POST /superdoc/v1/annotate — Populate DOCX template fields

Common patterns

Generate PDF from Markdown

  document_base64: Buffer.from(markdownContent).toString('base64'),
  from: 'md',
  to: 'pdf'
});

// Save the PDF
fs.writeFileSync('report.pdf', report);

Populate a contract template

  document: {
    url: 'https://your-bucket.s3.amazonaws.com/templates/contract.docx'
  },
  fields: [
    { id: 'client_name', type: 'text', value: 'Acme Corporation' },
    { id: 'contract_date', type: 'date', value: '2025-01-15' },
    { id: 'contract_amount', type: 'number', value: 50000 }
  ],
  output_format: 'pdf'
});

Convert uploaded DOCX to PDF

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

// Return to user or store
return new Response(pdfBuffer, {
  headers: { 'Content-Type': 'application/pdf' }
});

Related services

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