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Use react-pdf-html as an adapter, not as a browser engine. React-pdf’s documented authoring model is its own component tree—Document, Page, View, Text, Image and Link. The third-party react-pdf-html package parses an HTML string and maps supported nodes into that tree. You can therefore preserve custom markup while producing a React-pdf document, but browser-level HTML and CSS fidelity is not promised.
What actually renders your HTML
React-pdf exports React primitives that let you build a PDF document from components. It does not natively accept arbitrary HTML as a browser would. For existing markup, react-pdf-html provides a conversion layer: it parses the string, creates a node tree, and renders supported nodes with React-pdf components.
That distinction determines the implementation and the limits. A heading may become a Text node, a block container a View, an image an Image, and a link a Link. CSS is interpreted only where the corresponding property is supported by React-pdf. A stylesheet that works in Chrome can therefore require changes before it produces the same PDF.
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Install the renderer and HTML adapter
Install the current versions of the packages and check their compatibility with the React-pdf documentation and package metadata before pinning them in production:
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npm install @react-pdf/renderer react-pdf-htmlThe official React-pdf quick start covers both browser and server rendering. The adapter is a separate project, so its README is the authority for its current import and configuration details.
Build a PDF around an HTML string
The smallest composition places the adapter inside a React-pdf Page:
import { Document, Page } from '@react-pdf/renderer';
import Html from 'react-pdf-html';
const html = 'Report
Custom markup goes here.
';
export default function PdfDocument() {
return (
<Document>
<Page>
<Html>{html}</Html>
</Page>
</Document>
);
}This demonstrates the documented component composition. It is a conceptual starting point rather than a guarantee that every package-version combination will use identical imports. Verify the versions used by your application and test the generated file in the browser or server environment where it will run.
Put page-level layout in React-pdf
Use React-pdf components for the document shell and let the adapter handle the markup region. This keeps page size, padding and other renderer-level concerns explicit:
import { Document, Page, StyleSheet } from '@react-pdf/renderer';
import Html from 'react-pdf-html';
const styles = StyleSheet.create({
page: {
padding: 40,
fontSize: 11,
lineHeight: 1.4
}
});
export function InvoicePdf({ markup }) {
return (
<Document>
<Page size="A4" style={styles.page}>
<Html>{markup}</Html>
</Page>
</Document>
);
}React-pdf’s styling guide documents StyleSheet.create() and style objects. Prefer those APIs for the surrounding document, then use inline styles or supported style declarations in the HTML passed to the adapter.
Prepare the HTML you pass to <Html>
Keep the input a complete, predictable fragment
Generate the string before rendering and keep its structure simple. Use semantic headings, paragraphs, lists, images and links that the adapter documents. Avoid depending on browser-only behavior such as JavaScript event handlers, CSS layout engines, or DOM measurement performed after paint.
const markup = `
<h1>Quarterly report</h1>
<p>Revenue increased during the period.</p>
<ul>
<li>North America</li>
<li>Europe</li>
</ul>
<p><a href="https://example.com">Source details</a></p>
`;Sanitize untrusted input before handing it to any renderer. Sanitization is an application security responsibility; the adapter is not a substitute for an HTML security policy.
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Use CSS that React-pdf can represent
The adapter parses style tags and style attributes, but it supports CSS only to the extent that React-pdf supports the property. Treat browser CSS as a source format that may need conversion. Start with typography, color, spacing, borders and simple flex-compatible layout, then inspect the output PDF.
Do not promise pixel parity with a web page. Unsupported properties may be ignored, transformed, or produce a layout that differs from browser output. Move critical layout decisions into React-pdf styles when the HTML version is unreliable.
Resolve remote stylesheets before rendering
The adapter documentation says remote styles must be fetched asynchronously outside React rendering because React-pdf does not support asynchronous rendering. Fetch and validate the stylesheet first, then provide the resolved content or a transformed representation during the synchronous render pass.
async function loadMarkupAndStyles(url) {
const response = await fetch(url);
if (!response.ok) throw new Error(`HTTP ${response.status}`);
const html = await response.text();
// Fetch any remote CSS here, before rendering, and merge only
// declarations that your React-pdf version supports.
return html;
}
// Await loadMarkupAndStyles() in application code, then render
// <Html>{resolvedMarkup}</Html> synchronously.What markup is supported?
| Markup or feature | What the adapter documents | Practical guidance |
|---|---|---|
| Block and inline content | Mapped to React-pdf View and Text components |
Use ordinary headings, paragraphs and inline text first. |
| Images | Mapped to React-pdf Image |
Confirm that every source is reachable and supported in your runtime. |
| Links | Mapped to React-pdf Link |
Use valid URLs and verify link behavior in the generated PDF. |
| Unordered and ordered lists | Basic list support | Test indentation, markers and nested lists with your content. |
| Tables | Attempted with flex layouts | Test column widths, wrapping and long cells; do not assume browser-table fidelity. |
| Custom tags | Custom renderers are available | Map application-specific elements deliberately and provide a fallback. |
Table behavior deserves special attention: the project describes tables as an attempt using flex layouts, not as a full browser table engine. For invoices, reports or other documents where column alignment is essential, keep a representative fixture and test long text, missing values and page breaks.
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Render custom tags with a deliberate fallback
If your source contains elements such as <callout> or <product-card>, configure a custom renderer according to the adapter version’s API. The renderer should translate the tag into supported React-pdf primitives rather than trying to mount an arbitrary DOM element. Define what happens when a tag has no renderer: omit it safely, render its text content, or fail the document with a useful validation error.
Keep custom renderers small. Put page-level layout in Page and View, typography in a shared style object, and data transformation before the render call. This makes unsupported HTML easier to identify than a large, opaque HTML string.
Browser and server rendering choices
Browser output
Use the browser APIs documented by React-pdf when the user should preview or download a document interactively. Resolve data, remote CSS and image availability before invoking the render path. A preview is useful for catching unsupported styles, overflow and unexpected page breaks.
Server output
For automated reports, render on the server using React-pdf’s server facilities. Keep the render function synchronous once it starts: all network requests, stylesheet resolution, authentication and input validation should finish beforehand. Set explicit timeouts for upstream fetches and return a meaningful error instead of emitting a partially populated PDF.
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The import or build fails
- Cause: package versions, module format or import syntax do not match the installed releases.
- Fix: check the current
@react-pdf/rendererandreact-pdf-htmldocumentation, then use the import form shown for those exact versions. Do not copy an old lockfile blindly.
The PDF is blank or missing text
- Cause: the HTML string is empty, malformed, or contains nodes the adapter cannot map.
- Fix: log the final string, reduce it to a heading and paragraph, then add sections back one at a time. Validate input before rendering.
Styles work in the browser but not in the PDF
- Cause: the CSS property is outside React-pdf’s supported styling model.
- Fix: replace it with supported styles, move the layout into React-pdf components, and test the actual generated PDF rather than relying on a browser preview.
Remote CSS has no effect
- Cause: the stylesheet is being requested during React-pdf rendering.
- Fix: fetch it asynchronously first, validate it, and pass resolved content into the synchronous render.
Images or links fail
- Cause: an inaccessible URL, authentication requirement, unsupported source, or a runtime-specific loading issue.
- Fix: verify each resource independently, use stable URLs or preloaded data, and test in the same browser or server environment that generates the PDF.
Tables overflow or columns drift
- Cause: table support is implemented through flex layouts, so browser table algorithms do not apply.
- Fix: simplify the table, set explicit widths, constrain long content, and consider building the table directly with React-pdf
ViewandTextcomponents.
Performance, reliability and maintenance
- Resolve remote data, CSS and images once, before rendering; repeated network work makes output slower and less deterministic.
- Keep HTML fragments bounded and avoid embedding unnecessary page markup, scripts or tracking content.
- Test representative documents: short and long paragraphs, nested lists, wide tables, missing images, special characters and page boundaries.
- Pin versions only after checking compatibility, and rerun PDF fixtures when upgrading either package because adapter behavior and supported CSS can change.
- Compare the generated PDF itself, not merely the React component tree. The conversion layer can expose layout differences that are invisible in source HTML.
When a different approach is better
Use native React-pdf components when you control the document structure and need predictable pagination or complex layouts. Use react-pdf-html when preserving an existing HTML-oriented content pipeline is more valuable than perfect browser fidelity. If the requirement is an exact screenshot of a web page—including browser CSS and JavaScript—an HTML-to-React-pdf adapter is the wrong abstraction; capture the rendered page instead.
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Or skip the browser setup
If your goal is a rendered image or PDF of a web page rather than a semantic React-pdf document, ScreenshotNeo provides a website screenshot API and MCP server. It accepts consent banners before capture and removes more than 60 known consent platforms, newsletter popups and chat widgets. Bot checks, blank pages, timeouts, failed loads and cache hits are not billed, and each response identifies the page verdict and billing status.
One GET request returns a PNG, JPEG, WebP or PDF. See the ScreenshotNeo documentation for the current options, including full-page capture, element selectors, device presets, custom CSS and JavaScript, waiting rules, request blocking, cookies and headers, PDF page settings, caching, signed links, asynchronous jobs, bulk capture and usage information.
curl -G "https://api.screenshotneo.com/v1/shot" -d access_key=YOUR_API_KEY --data-urlencode url=https://stripe.com -o shot.webpimport requests
r = requests.get("https://api.screenshotneo.com/v1/shot", params={"access_key": "YOUR_API_KEY", "url": "https://stripe.com"}, timeout=90)
open("shot.webp", "wb").write(r.content)const q = new URLSearchParams({ access_key: 'YOUR_API_KEY', url: 'https://stripe.com' });
const res = await fetch(`https://api.screenshotneo.com/v1/shot?${q}`);ScreenshotNeo is not a replacement for React-pdf’s component model when you need structured, selectable PDF content. It is the simpler route when the desired result is a clean capture of a rendered URL. An MCP server also lets AI agents use take_screenshot, get_page_info and capture_pdf. The Free plan includes 1,000 screenshots a month with no card; paid plans start at $5 for 3,000. Create a free ScreenshotNeo account.
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- Install compatible versions of
@react-pdf/rendererandreact-pdf-html. - Build the document shell with
DocumentandPage. - Pass a validated HTML string to
Html. - Use only CSS properties supported by React-pdf, or move critical styles into React-pdf style objects.
- Fetch remote styles and resources before synchronous rendering.
- Test lists, links, images, custom tags and especially flex-based tables.
- Choose native React-pdf components when the adapter cannot provide the required fidelity.
Frequently Asked Questions
Does this produce a browser-identical PDF?
No. The adapter converts supported HTML into React-pdf primitives, and CSS is limited to properties React-pdf supports.
Can I fetch a stylesheet while React-pdf is rendering?
No. Resolve remote styles asynchronously before the render pass, then provide the resolved content synchronously.
Are HTML tables fully supported?
Basic tables are attempted with flex layouts. Verify widths, wrapping and page breaks, or build critical tables directly with React-pdf components.
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