AI document generation API
Turn AI output into polished PDFs
Language models are great at writing content and weak at producing print-ready documents. Have the model emit HTML or Markdown, then render it to a real PDF with proper fonts, layout, and page breaks. The model writes, the API typesets.
Generate content, then render it
Ask the model for a complete HTML document, or Markdown you convert to HTML, then send it to the render API. Pair it with a template to keep AI output inside a layout you trust.
// 1. Ask the model for HTML (or Markdown you convert to HTML).
const html = await llm.generate(`
Return a complete HTML document for a one-page sales report.
Data: ${JSON.stringify(metrics)}
`);
// 2. Render that HTML to a real PDF.
const res = await fetch("https://api.pdfpipe.xyz/v1/pdf", {
method: "POST",
headers: {
Authorization: `Bearer ${process.env.PDFPIPE_API_KEY}`,
"Content-Type": "application/json",
},
body: JSON.stringify({ html, options: { format: "A4" } }),
});Patterns that work well
Template plus AI data
Let the model fill structured fields, drop them into a fixed template, and render. Predictable layout, dynamic content.
Model writes HTML
For freeform documents, have the model return HTML and render it directly. Most flexible, least constrained.
Markdown bridge
Models love Markdown. Convert it to HTML, add your CSS, and render a clean report.
Use cases
- AI-generated reports and summaries as shareable PDFs.
- LLM report generation from analytics or CRM data.
- Personalized documents drafted by a model, typeset by the API.
- Agent workflows that need a document as their final artifact.
Frequently asked
How do I generate a PDF from AI or LLM output?
Have the model produce HTML, or Markdown you convert to HTML, then POST it to the render API. The model handles the words, the API handles fonts, layout, and pagination.
How do I keep AI output on-brand?
Use a template: let the model fill structured fields and render them inside a fixed HTML layout, so the document always matches your design even when the content varies.
Can I sanitize untrusted model output?
Yes. Treat model HTML like any untrusted input: sanitize it before rendering, and the render environment also isolates the page so it cannot reach private resources.
Is this good for agent and LLM report workflows?
Yes. When an agent needs a document as its output, generating HTML and rendering it gives you a real, distributable PDF.
Which PDF API do you need?
These pages cover related search intents. Pick the one that matches what you are building.
500 free documents a month, flat pricing after that, and a live playground you can try without signing up.