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The html-to-image npm package turns a live browser DOM node into an image or related output: PNG, JPEG, SVG, Blob, Canvas, or raw pixel data. Install it with npm i html-to-image, then pass an element such as a card or chart to the function that matches what your app needs. It is a browser-side DOM renderer, not a Node.js tool for taking a screenshot of an arbitrary URL.
What html-to-image does—and where it runs
html-to-image generates an image from a DOM node using browser HTML, SVG, and canvas capabilities. You provide an element already present in the page; the library reconstructs its content and styles for rendering. It is useful for exporting a chart, profile card, invoice, or other section of a web application.
The distinction matters for server-side code. This package expects a browser DOM node. It does not accept a URL or a string of HTML and launch a browser in Node.js. For a Node.js workflow that renders HTML through a headless browser, node-html-to-image describes a Puppeteer-based approach. The right choice depends on where the content is and whether a browser is already rendering it.
Install the npm package
From your project directory, run:
npm i html-to-imageThe project README also documents npm install --save html-to-image. Use the package manager and lockfile conventions already used by your project. The package supports ES module imports and CommonJS-style require.
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Capture a DOM element as PNG
In a browser application, select the target node and pass it to toPng. A React component can keep the node in a ref, as shown in the project README.
import * as htmlToImage from 'html-to-image';
const node = document.getElementById('export-card');
if (!node) {
throw new Error('Could not find #export-card');
}
htmlToImage.toPng(node)
.then((dataUrl) => {
const link = document.createElement('a');
link.download = 'card.png';
link.href = dataUrl;
link.click();
})
.catch((error) => {
console.error('Could not export the card:', error);
});This code runs in a page where document exists and the target element has been rendered. In a React app, trigger the capture after the component and its assets have rendered, and pass the element stored in the ref rather than querying for an element before it exists.
Choose the output type
The documented methods return different things, so choose based on the next step in your app—not just the file extension you want.
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| Method | Result | When it fits |
|---|---|---|
toPng(node) |
PNG data URL | Display an image in the page or download a lossless raster image. |
toJpeg(node, options) |
JPEG data URL | Produce a compressed photographic image; the documented quality option ranges from 0 to 1 and defaults to 1.0. |
toSvg(node) |
SVG data URL | Keep the serialized rendering in SVG form where that output is suitable. |
toBlob(node) |
Image Blob |
Pass image data to browser APIs that accept a Blob or create an object URL. |
toCanvas(node) |
HTMLCanvasElement |
Continue working with the rendered canvas in the browser. |
toPixelData(node) |
Uint8Array containing RGBA pixel data |
Consume pixel values in code that needs raw image data. |
For a PNG download, a data URL is convenient. For APIs that accept binary data, a Blob is generally the more direct result. If you need to inspect or manipulate pixels, use the pixel-data method or canvas output. The library’s function names and return types are documented in its project README.
Options for sizing, appearance, and asset handling
Options let you adjust the output without changing the source node. The README documents these options; check its current API description for the exact shape accepted by your installed version.
filter: exclude a node from the capture. Excluding a node also excludes its children, and the filter is not called on the root node itself.backgroundColor: set a background color for the rendered result.widthandheight: set dimensions used for the cloned node.canvasWidthandcanvasHeight: set the canvas dimensions separately from the node dimensions.style: apply style changes for the rendering.quality: set JPEG quality from 0 to 1; the documented default is 1.0.pixelRatio: adjust the pixel ratio used in rendering.cacheBustandincludeQueryParams: influence resource URL handling while assets are fetched.imagePlaceholder: provide a placeholder for image resources.- Preferred font format: choose the font format to embed where supported by the documented options.
For example, this capture omits elements matched by a predicate and sets a white background:
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htmlToImage.toPng(node, {
backgroundColor: '#ffffff',
filter: (element) => !element.classList?.contains('no-export'),
pixelRatio: 2,
}).then((dataUrl) => {
document.querySelector('#preview').src = dataUrl;
});In this example, a node with the no-export class is excluded along with its descendants. The root element is not passed to filter, so put the exclusion class on a child if the root should remain in the capture. Higher pixel ratios increase output resolution and may increase the amount of rendering work and memory required.
How rendering works, and why captures can differ
The library does more than take a direct bitmap of the visible screen. Its documented process clones the element tree, copies computed styles, recreates pseudo-elements, embeds fonts and images, serializes the clone, wraps it in SVG using <foreignObject>, and draws raster output or pixel data through an off-screen canvas.
That reconstruction explains why a capture may differ from what you see. A font or image that cannot be loaded or embedded may be missing; styles that depend on browser behavior may render differently; and canvas security rules can block readback. Keep the element and required assets available to the page, and verify the result in the browser where the application will run.
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Browser support and practical limits
The project README requires Promise and SVG <foreignObject> support. It reports testing on latest Chrome, Firefox, and Safari as versions 49, 45, and 16 respectively “at the time of writing.” Those version numbers are historical documentation, not proof of current browser coverage. The README says Internet Explorer is unsupported because it does not support SVG <foreignObject>.
A canvas inside the captured node may render, but a tainted canvas can prevent successful rendering. Very large DOM trees may also exceed data-URI limits, which vary; the README gives no universal size threshold. If a large capture fails, reduce the captured content or output dimensions and test the actual target browser rather than relying on a presumed limit.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common problems and fixes
- The node is missing or capture starts too early: ensure the element exists before calling the method. In component frameworks, trigger capture only after the relevant render has completed.
- An image or font is absent: check that the asset is reachable and can be embedded in the rendering context. Confirm that it has loaded before capture; use the documented placeholder option if a fallback image is appropriate.
- The promise rejects around a canvas: check whether a canvas in the captured subtree is tainted by cross-origin content. The README warns that taint can prevent rendering; browser canvas security, rather than the output method alone, may be the cause.
- Styles or pseudo-elements look different: remember that the library reconstructs the node from computed styles and serialized markup. Inspect the relevant computed styles and pseudo-element content, then simplify or explicitly set styles for the exported version.
- A huge capture fails or stalls: try a smaller subtree or smaller dimensions. Data URI size limits vary, and the README does not specify a cutoff.
- It fails in a browser you support: confirm Promise and SVG
<foreignObject>support in that browser. The project’s historical tested-version note should not be treated as a current compatibility guarantee.
Or skip the browser setup
If your actual task is to capture a public website by URL rather than export a DOM node already in your app, use a screenshot API instead of wiring this browser library into a page. ScreenshotNeo accepts one GET request with a URL and can return PNG, JPEG, WebP, or PDF. It accepts cookie and consent banners before capture and removes more than 60 known consent platforms, newsletter popups, and chat widgets; those cleanup steps can each be turned off. Bot checks and CAPTCHAs, blank pages, timeouts, failed loads, and cache hits are not billed, and responses identify the page verdict and billing status in headers. Its MCP server provides take_screenshot, get_page_info, and capture_pdf for AI agents and MCP clients.
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Should you use html-to-image?
Use html-to-image when your application already has the DOM node to export and the capture belongs in the browser. Choose among its data URL, Blob, Canvas, SVG, or pixel-data outputs according to what consumes the result. If the input is instead a URL or HTML rendered on a server, use a workflow built for headless browser rendering or a hosted screenshot service; those solve a different problem.
Frequently Asked Questions
Can html-to-image capture an arbitrary website URL?
No. Its documented API takes a DOM node in a browser page; it is not a URL screenshot endpoint.
Does html-to-image require React?
No. React refs are one documented usage pattern, but the library operates on a DOM node and can be used without React.
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The documented output methods are image data, SVG, Blob, Canvas, or pixel data; PDF is not among the listed methods.
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