How does HTML to PDF conversion work?

Send your HTML content to our API endpoint and receive a PDF in response. We use a headless browser engine to render your HTML exactly as it would appear in a browser, then convert it to PDF format.

What HTML/CSS features are supported?

We support modern CSS including Flexbox, Grid, custom fonts, media queries, and more. Anything that renders in Chrome will render in your PDF.

Can I use custom fonts?

Yes. You can use any Google Font by name, or upload your own font files. Pro and Enterprise plans include custom font support.

Trusted by 2,000+ developers

Convert HTML to PDF
in milliseconds

The most reliable HTML to PDF API. Pixel-perfect rendering, modern CSS support, and enterprise-grade reliability.

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99.9%

Uptime

<200ms

Response

50M+

PDFs Generated

The Problem

PDF generation shouldn't be this hard

Most teams waste weeks wrestling with outdated tools and broken layouts.

The old way

Install wkhtmltopdf, Puppeteer, or PhantomJS on every server

Deal with Chrome version mismatches and memory leaks

Debug CSS rendering differences between environments

Handle timeouts and zombie processes in production

Scale servers just for PDF generation workloads

Maintain security patches for headless browsers

npm install puppeteer  → Downloads 300MB Chromium
docker build           → Fails on Alpine Linux
production deploy      → Memory leak, 2 weeks debugging

With SyntaxDoc

One API call. Zero dependencies to install.

Consistent rendering across all environments

Auto-scaling infrastructure handles any load

99.9% uptime SLA — we handle the ops

Modern CSS support: Grid, Flexbox, custom fonts

Async webhooks for large documents

const pdf = await syntaxdoc.convert({ html })
// That's it. PDF ready in ~150ms ✓

Simple Integration

Three lines of code

Send HTML, get PDF. Works with any language.

Features

Why developers choose Syntaxdoc

Built for reliability and performance at any scale

Fast rendering

Average response time under 200ms. Our optimized engine handles complex layouts without breaking a sweat.

Pixel-perfect output

What you see is what you get. CSS Grid, Flexbox, custom fonts — all rendered exactly as intended.

Enterprise-grade reliability

99.9% uptime SLA backed by redundant infrastructure across multiple regions.

Simple REST API

One endpoint. JSON in, PDF out. Official SDKs for Node.js, Python, Go, Ruby, and PHP.

Async processing

Webhook notifications for large documents. Never block your application waiting for PDF generation.

Storage included

Cache generated PDFs for 7 days. Access them via unique URLs or regenerate on demand.

Pricing

Simple, transparent pricing

Start free, scale as you grow

FAQ

Common questions

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Convert HTML to PDFin milliseconds