HTML to PDF: saving web pages with style preserved
By the Converterzilla Team
We build privacy-first PDF and image tools that run entirely in your browser. Our team has shipped JavaScript file-processing apps used by thousands every day, and we write here about the libraries, trade-offs and patterns we use.
Browser print preview gives you a rough PDF of any web page, but the result is usually ugly: navigation bars, ads, sidebars, all crammed onto the page. The issue is that most websites don't have a print stylesheet, and browsers fall back to the screen layout, which wasn't designed for paper.
Print vs screen styles
Modern websites can serve different CSS for screen and print using @media print queries. Sites that use this well render beautifully when you press print. Sites that don't (most of them) need help — either from you (Reader Mode in your browser) or from a converter that strips clutter.
What a real HTML-to-PDF converter does
- Loads the page in a headless browser (Chromium-based)
- Waits for JavaScript to finish
- Optionally applies a clean reading-mode stylesheet
- Adds page numbers and headers/footers
- Exports as a paginated PDF
Conversions that fail
Pages behind login walls won't work from a public converter — you'd need to save the HTML locally first and feed that. Heavy JavaScript apps (dashboards, SaaS tools) sometimes need extra wait time for charts to render. Custom fonts loaded from third parties usually come through, but corporate firewalls can block the converter's font fetches.
Our HTML to PDF tool will use headless Chromium with custom header/footer support. Coming with the next server release.