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Your documents are never persisted. Every API call is stateless: process and forget. That’s the point. Convert contracts to PDF. Add signatures to agreements. Merge quarterly reports. Everything preserves-tracked changes, complex tables, nested lists, headers. Real document operations via REST API.

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Why stateless matters

Enterprise documents contain sensitive data. NDAs, financial reports, legal contracts. SuperDoc’s API processes them in memory and returns results immediately. No storage. No persistence. No risk.

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Base URL

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Authentication

Bearer token in every request (except /v1/health):

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What’s working now

Convert - DOCX to PDF with perfect fidelity. That 50-page contract with tracked changes? Converts flawlessly.
Annotate - Programmatically populate fields in your DOCX templates. Insert text, images, signatures, and tables.
Sign - Add cryptographic signatures to PDFs and DOCX documents with full audit trail support.
Verify - Validate the authenticity and integrity of signed PDFs.

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What’s coming

/merge - Combine documents with formatting intact.

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Built for real documents

This isn’t a wrapper around LibreOffice. SuperDoc uses custom document processing that handles:
  • Tables spanning multiple pages
  • Tracked changes from multiple reviewers
  • Embedded images and charts
  • Complex numbered lists and cross-references
  • Headers/footers with dynamic fields
Your Word documents work because SuperDoc was built for Word documents. Not markdown. Not HTML: actual DOCX files.

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Resources

Status Page - Uptime and incidents
GitHub - Examples and issues