HTML to PDF API
Convert HTML content or any URL into a production-ready PDF instantly.
Transform raw HTML strings or live URLs into polished PDF documents. Supports custom page formats, margins, landscape mode and background printing — ideal for invoices, reports and contracts.
How it works
Three steps. No complex setup.
Send your request
Make a POST with the data you want to analyze. Include your API key in the Authorization header.
We process server-side
Our engine validates, analyzes and enriches the data in under 200ms. No external APIs, no network latency.
Receive the result
Typed JSON with all documented fields. Clear errors if something fails. Production ready.
Who is it for?
Response example
Real input and output. What you send and what you get back.
// Input
{
"html": "<h1>Hello World</h1><p>This is a test document.</p>",
"options": {
"format": "A4",
"margin": "20px",
"landscape": false
}
}// Output
{
"success": true,
"pdf_base64": "JVBERi0xLjQKJeLjz9MKNSAwIG9iago...",
"size_bytes": 24821,
"pages": 1,
"format": "A4",
"generation_time_ms": 380
}Try it now
// live demo — no account needed to try
Playground
Integrate into your project
Copy and paste. Replace YOUR_API_KEY with your real key.
curl -X POST https://jsnhengine.com/api/v1/html-to-pdf \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"html":"<h1>Hello World</h1><p>Test document.</p>","options":{"format":"A4"}}'Why choose JSNH Engine Lab
Low latency
Responses in under 200ms
Secure authentication
API keys with per-plan rate limiting
Usage tracking
Every request logged with metrics
Production ready
Input validation and typed errors
Frequently asked questions
Everything you need to know before integrating.
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// production ready
Start using HTML to PDF API
Sign up free and get 1,000 tokens to start. No credit card. No complex setup.