HTML to PDF Pro

The Problem

Converting HTML to PDF is rarely a simple export task. The hard part is preserving the visual contract of the page: Chinese text may render incorrectly, CSS styles may disappear, tables or cards may split across pages, and local files may look different from remote URLs. For engineers, this usually means reports, invoices, tickets, or documentation pages cannot be archived or printed without manual reformatting.

This skill treats HTML-to-PDF conversion as a repeatable automation task: provide a local HTML file or a web URL, and receive a PDF that preserves the intended layout. It is especially useful for office documents, report pages, and list-style pages where visual consistency matters.

How It Works

The core approach is to render HTML with a browser engine and then print the rendered page to PDF, rather than converting raw HTML text into a static document. The recommended path is Playwright, which can execute JavaScript, handle modern CSS layouts such as Grid and Flexbox, and produce output closer to a real browser print view. A fallback path is weasyprint, which is useful when a browser runtime is not available, but it is more sensitive to system dependencies and has narrower CSS compatibility.

Key capabilities include:

• Chinese support: handles UTF-8 content and relies on available system fonts for Chinese text.
• Style preservation: keeps colors, fonts, and layout structures that are defined with CSS.
• Pagination control: reduces the chance that tables or cards are cut across page breaks.
• Parameterized output: page size, margins, landscape mode, and background printing can be adjusted.
• Input flexibility: supports both local HTML files and remote URLs, making it useful for capturing web pages as shareable documents.

In practice, the workflow starts with selecting the target HTML source and output destination, then adjusting parameters such as --format, --margin-top, and --print-background when needed. For complex pages, it is better to define Chinese fonts explicitly in the HTML and use print-friendly CSS rules to control element breaks.

Boundaries and Caveats

This skill is best suited to document-style HTML pages with stable layout, such as report templates, specification pages, lists, and simple data pages. It is not a screenshot tool and is not ideal for pages that depend heavily on dynamic interactions, Canvas rendering, or live data updates.

A few practical caveats:

• Background images can increase PDF size; compress images or disable background printing when the page contains many assets.
• Font rendering depends on the host environment; missing Chinese fonts may cause fallback behavior or visual differences.
• Long pages require pagination review to avoid splitting tables, cards, or form sections.
• Remote URLs may be affected by authentication, anti-bot rules, or client-side rendering, so the page should be verified before export.

Overall, the value of this skill is turning “HTML that displays in a browser” into “PDF that can be delivered,” reducing manual layout work in report archiving, document export, and print-oriented workflows.