Introduction

The most reliable HTML to PDF conversion API. Handle complex layouts, custom fonts, and dynamic content with pixel-perfect accuracy.

Why SyntaxDoc?

Unlike other PDF generation services, SyntaxDoc is built specifically for complex HTML layouts. Whether you're generating invoices, reports, certificates, or documentation, we handle:

• Tables & Grids - Perfect rendering of complex table structures
• Custom Fonts - Use any web font with automatic caching
• Images & SVGs - Full support for embedded assets with intelligent caching
• Multi-page Documents - Automatic page breaks with headers/footers
• CSS Support - Modern CSS including Flexbox and Grid
• Smart Page Breaks - Automatic table splitting and intelligent content flow
• QR Code Generation - Auto-generate QR codes inline with data-qr attributes
• Text Watermarks - Add customizable text watermarks to every page
• Batch Processing - Generate hundreds of PDFs in a single request
• PDF Merging - Combine multiple PDFs into one document
• PDF Hosting - Store and serve your PDFs with direct URLs

Quick Example

const formData = new FormData();
formData.append('files', new Blob(['<h1>Hello World</h1>'], { type: 'text/html' }), 'index.html');
formData.append('options', JSON.stringify({
  fileName: 'hello',
  format: 'A4',
  margin: { top: '1cm', bottom: '1cm', left: '1cm', right: '1cm' }
}));

const response = await fetch('https://api.syntaxdoc.com/pdf/generate', {
  method: 'POST',
  headers: {
    'X-API-Key': 'sk_live_your_api_key',
  },
  body: formData
});

const pdf = await response.blob();

Advanced Features

Automatic QR Code Generation

Embed QR codes directly in your HTML - no separate API calls needed:

<img data-qr="https://syntaxdoc.com/verify/cert-12345" 
     data-qr-size="200" 
     alt="Verification QR Code" />

The QR code is automatically generated and embedded during PDF creation. Perfect for certificates, tickets, invoices, and product labels.

Learn more about QR codes →

Text Watermarks

Add watermarks for branding, security, or document status:

{
  watermark: {
    text: 'CONFIDENTIAL',
    fontSize: 60,
    opacity: 0.2,
    rotation: -45,
    color: { r: 1, g: 0, b: 0 }
  }
}

Learn more about watermarks →

Get Started

Base URL

All API requests should be made to:

https://api.syntaxdoc.com

Authentication

All PDF generation endpoints require an API key. Include it in the X-API-Key header:

X-API-Key: sk_live_your_api_key

Plans & Pricing