Create from HTML

Two entry points are available:

1. Pdf::from_html(content) — basic structural HTML (headings, paragraphs, lists, code, bold/italic). No styling. Every binding.
2. Pdf::from_html_css(html, css, font_bytes) — full pure-Rust HTML+CSS pipeline introduced in v0.3.37. Hand-rolled CSS engine (L3 + L4 selectors subset, cascade, calc() / var(), @page / @media print), Taffy-backed block / flex / grid layout, UAX #14 line breaking, RTL shaping via rustybuzz, ::before / ::after, page-break-*, <a href> → link annotation, <img> data-URI → /XObject, multi-font cascade. Zero MPL dependencies. Every binding.

Quick Example

Python

from pdf_oxide import Pdf

pdf = Pdf.from_html("<h1>Hello</h1><p>World</p>")
pdf.save("out.pdf")

WASM

import { WasmPdf } from "pdf-oxide-wasm";
import { writeFileSync } from "fs";

const pdf = WasmPdf.fromHtml("<h1>Hello</h1><p>World</p>");
writeFileSync("out.pdf", pdf.toBytes());

Rust

use pdf_oxide::api::Pdf;

let pdf = Pdf::from_html("<h1>Hello</h1><p>World</p>")?;
pdf.save("out.pdf")?;

Go

package main

import (
    "log"
    pdfoxide "github.com/yfedoseev/pdf_oxide/go"
)

func main() {
    pdf, err := pdfoxide.FromHtml("<h1>Hello</h1><p>World</p>")
    if err != nil { log.Fatal(err) }
    defer pdf.Close()

    if err := pdf.Save("out.pdf"); err != nil { log.Fatal(err) }
}

C#

using PdfOxide;

using var pdf = Pdf.FromHtml("<h1>Hello</h1><p>World</p>");
pdf.Save("out.pdf");

HTML + CSS pipeline (v0.3.37)

Pdf::from_html_css(html, css, font_bytes) takes HTML, a CSS stylesheet, and TTF/OTF font bytes. Returns a paginated PDF. extract_text round-trips byte-equal so produced PDFs participate in the existing test infrastructure.

Rust:

use pdf_oxide::api::Pdf;

let font = std::fs::read("DejaVuSans.ttf")?;
let pdf = Pdf::from_html_css(
    "<h1>Hello</h1><p>World</p>",
    "h1 { color: blue; font-size: 24pt } p { line-height: 1.5 }",
    font,
)?;
pdf.save("out.pdf")?;

Python:

from pdf_oxide import Pdf

with open("DejaVuSans.ttf", "rb") as f:
    font = f.read()

pdf = Pdf.from_html_css(
    "<h1>Hello</h1><p>World</p>",
    "h1 { color: blue; font-size: 24pt }",
    font,
)
pdf.save("out.pdf")

Node / TypeScript:

import { Pdf } from "pdf-oxide";
import { readFileSync } from "fs";

const font = readFileSync("DejaVuSans.ttf");
const pdf = Pdf.fromHtmlCss(
  "<h1>Hello</h1><p>World</p>",
  "h1 { color: blue; font-size: 24pt }",
  font,
);
pdf.save("out.pdf");

Go:

font, _ := os.ReadFile("DejaVuSans.ttf")
pdf, err := pdfoxide.FromHtmlCss(
    "<h1>Hello</h1><p>World</p>",
    "h1 { color: blue; font-size: 24pt }",
    font,
)
if err != nil { log.Fatal(err) }
defer pdf.Close()
_ = pdf.Save("out.pdf")

C#:

var font = File.ReadAllBytes("DejaVuSans.ttf");
using var pdf = Pdf.FromHtmlCss(
    "<h1>Hello</h1><p>World</p>",
    "h1 { color: blue; font-size: 24pt }",
    font);
pdf.Save("out.pdf");

Multi-font cascade

Use Pdf::from_html_css_with_fonts(html, css, fonts) when your document mixes several font families. CSS font-family on any element resolves against registered families (case-insensitive, with/without quotes, multi-word unquoted). Unknown families fall back to the first registered font.

from pdf_oxide import Pdf

fonts = [
    ("DejaVu Sans", open("DejaVuSans.ttf", "rb").read()),
    ("Noto Sans CJK", open("NotoSansCJKtc-Regular.otf", "rb").read()),
]

pdf = Pdf.from_html_css_with_fonts(
    '<h1 style="font-family: DejaVu Sans">English</h1>'
    '<p style="font-family: \'Noto Sans CJK\'">中文段落</p>',
    "h1 { font-size: 24pt }",
    fonts,
)
pdf.save("multilang.pdf")

CJK content is automatically subsetted on output (v0.3.38 #385) — a PDF with 5 characters from a ~17 MB CJK font typically ships under 100 KB.

Supported CSS surface

• Selectors — L3 + L4 subset: :is / :where / :not / :has, structural pseudo-classes, attribute matchers with i / s flags.
• Cascade — origin / specificity / source-order sorting, inheritance, inline-style merge, custom properties (var() with cycle detection).
• Functions — calc(), min(), max(), clamp().
• At-rules — @media print (always-true), (min/max-width), @page :first / :left / :right / :blank with margin boxes, @font-face, @import, @supports.
• Typed values — colour (~150 named, hex, rgb/rgba, hsl), length (every CSS Values L4 unit), display, font-size / weight / style / family, margin / padding shorthand, line-height.
• Counters — counter / counters, counter-reset / -increment / -set, Roman / Greek / alpha numbering.
• Pseudo-elements — ::before / ::after with literal strings, attr(name), open-quote / close-quote.
• Layout — block, flex, grid (all via Taffy), margin collapsing, multi-column (column-count / column-width / column-gap), tables (auto + fixed column algorithms).
• Inline — UAX #14 line breaking, text-align, white-space modes, hard breaks, atomic inline boxes.
• Effects — opacity, transform: translate*(), page-break-before: always, page-break-after: always.
• HTML — HTML5 tokenizer, <style> / <link rel="stylesheet"> / inline style="" extraction, <img> data-URI decode (/XObject), <a href> → /Link annotation with /URI, <ul> / <ol> list markers.

Out of scope

CSS filters, 3D transforms, animations, SVG-in-HTML (every viable Rust SVG crate is MPL), MathML, hyphens: auto, shape-outside, JavaScript execution, full-matrix transform (scale / rotate), gradients, box-shadow.

Licence

cargo deny check licenses passes with zero MPL transitive dependencies. The Mozilla CSS stack (cssparser, selectors, html5ever, lightningcss, stylo) is all MPL-2.0; v0.3.37 hand-rolls the equivalents to keep pdf_oxide entirely under MIT/Apache.

Supported HTML Elements

Element	Description
<h1> through <h6>	Headings (mapped to PDF heading sizes)
<p>	Paragraphs with automatic spacing
<b>, <strong>	Bold text
<i>, <em>	Italic text
<ul>, <ol>, <li>	Unordered and ordered lists
<pre>, <code>	Preformatted and inline code
<blockquote>	Block quotations
<br>	Line breaks
<hr>	Horizontal rules

Full API Reference

Pdf::from_html(content) (Static Method)

Creates a PDF from HTML content using default settings (Letter page, 72pt margins, 12pt Helvetica).

Rust:

use pdf_oxide::api::Pdf;

let html = r#"
<h1>Product Specification</h1>
<p>This document describes the <strong>technical requirements</strong>
for the new product line.</p>
<h2>Requirements</h2>
<ul>
    <li>Operating temperature: -20C to 60C</li>
    <li>Power consumption: &lt;5W</li>
    <li>Weight: &lt;200g</li>
</ul>
"#;

let pdf = Pdf::from_html(html)?;
pdf.save("spec.pdf")?;

JavaScript:

import { WasmPdf } from "pdf-oxide-wasm";
import { writeFileSync } from "fs";

const html = `
<h1>Product Specification</h1>
<p>This document describes the <strong>technical requirements</strong>
for the new product line.</p>
`;

const pdf = WasmPdf.fromHtml(html);
writeFileSync("spec.pdf", pdf.toBytes());

Python:

from pdf_oxide import Pdf

html = """
<h1>Product Specification</h1>
<p>This document describes the <strong>technical requirements</strong>
for the new product line.</p>
"""

pdf = Pdf.from_html(html)
pdf.save("spec.pdf")

Python Signature:

Pdf.from_html(
    content: str,
    title: str | None = None,
    author: str | None = None
) -> Pdf

PdfBuilder::new().from_html(content) (Builder Pattern)

Use PdfBuilder for control over page size, margins, font size, and document metadata.

Rust:

use pdf_oxide::api::PdfBuilder;
use pdf_oxide::writer::PageSize;

let pdf = PdfBuilder::new()
    .title("Technical Specification")
    .author("Engineering")
    .page_size(PageSize::A4)
    .margin(54.0)
    .font_size(11.0)
    .from_html("<h1>Spec</h1><p>Version 2.0</p>")?;

pdf.save("spec_a4.pdf")?;

Advanced Examples

Structured Report

use pdf_oxide::api::Pdf;

let html = r#"
<h1>Incident Report</h1>
<h2>Summary</h2>
<p>On <em>2025-11-15</em>, a service disruption was detected in the
<strong>payment processing</strong> pipeline.</p>

<h2>Timeline</h2>
<ol>
    <li>14:32 UTC - Alert triggered for elevated error rates</li>
    <li>14:35 UTC - On-call engineer acknowledged</li>
    <li>14:48 UTC - Root cause identified: database connection pool exhaustion</li>
    <li>15:02 UTC - Fix deployed, services recovering</li>
    <li>15:15 UTC - Full recovery confirmed</li>
</ol>

<h2>Root Cause</h2>
<p>A configuration change deployed at 14:00 UTC reduced the maximum
connection pool size from 100 to 10.</p>

<h2>Code Reference</h2>
<pre><code>max_connections: 10  # Should be 100
timeout_seconds: 30
</code></pre>

<h2>Action Items</h2>
<ul>
    <li>Add validation for connection pool configuration</li>
    <li>Implement canary deployment for config changes</li>
    <li>Add alerting for connection pool utilization</li>
</ul>
"#;

let pdf = Pdf::from_html(html)?;
pdf.save("incident_report.pdf")?;

Python with Dynamic HTML

from pdf_oxide import Pdf

rows = [
    ("Widget A", "$12.99", 150),
    ("Widget B", "$24.50", 89),
    ("Widget C", "$7.25", 312),
]

html = "<h1>Inventory Report</h1>"
html += "<p>Generated on 2025-11-20</p>"
html += "<h2>Current Stock</h2><ul>"
for name, price, qty in rows:
    html += f"<li><strong>{name}</strong> - {price} ({qty} units)</li>"
html += "</ul>"

pdf = Pdf.from_html(html, title="Inventory Report")
pdf.save("inventory.pdf")

Reading HTML from a File

from pdf_oxide import Pdf

with open("report.html") as f:
    html = f.read()

pdf = Pdf.from_html(html, title="Report")
pdf.save("report.pdf")

import { WasmPdf } from "pdf-oxide-wasm";
import { readFileSync, writeFileSync } from "fs";

const html = readFileSync("report.html", "utf-8");
const pdf = WasmPdf.fromHtml(html);
writeFileSync("report.pdf", pdf.toBytes());

use pdf_oxide::api::Pdf;

let html = std::fs::read_to_string("report.html")?;
let pdf = Pdf::from_html(&html)?;
pdf.save("report.pdf")?;

Related Pages

• Create from Markdown – Convert Markdown to PDF
• PdfBuilder Fluent API – Full builder configuration options
• DocumentBuilder Low-Level API – Programmatic page construction