Lossless detail
Keep text, icons, charts, and interface elements crisp without compression artifacts.
HTML to PNG API
Convert HTML and CSS to PNG
Send HTML and CSS to the API and receive a hosted .png image URL. HCTI manages Chromium, rendering, storage, and delivery.
- HTML, CSS, and JavaScript
- Hosted .png image URL
- Viewport and browser controls
View example
Request
Live demo
Turn HTML and CSS into a PNG image
Edit the HTML and CSS, choose the image settings, and render a PNG with the same API used in production.
Format advantages
Why generate PNG images from HTML?
PNG preserves sharp edges, text, and transparency, making it ideal for interface captures and designed graphics.
Transparent backgrounds
Preserve transparent HTML backgrounds for overlays, product graphics, badges, and reusable assets.
Reliable visual fidelity
Use PNG when exact colors and sharp edges matter more than achieving the smallest possible file.
HTML to image API
Request PNG output directly
Send HTML and CSS to the API with the format set to png. Chromium renders the content and the response URL points to the generated .png image.
-
HTML and CSS input
Send complete markup and styles, including browser-supported fonts, images, SVG, and JavaScript.
-
PNG output
Set format to png and use the hosted .png URL returned by the API.
-
Viewport and crop controls
Set viewport dimensions and device scale, or crop the result to a CSS selector.
-
Page environment
Choose light or dark mode, timezone, and screen or print media.
Request
How it works
From markup to a finished PNG
-
Send HTML and CSS
Submit the content with format set to png and any viewport or browser settings.
-
Chromium renders the design
The API loads the markup, styles, fonts, and assets in a managed browser environment.
-
Use the .png URL
Embed the hosted result, download the file, or save it in your own storage and application records.
Output formats
One API, the format your workflow needs
Keep the same HTML and CSS. Choose lossless detail, compact compatibility, modern web delivery, or a paginated document.
Looking to capture a webpage as PNG? Explore URL to PNGCompact + universal
Modern + efficient
Document + printable
.jpeg
HTML to JPEG
Smaller files and broad compatibility for photography, previews, and content-heavy pages.
Explore JPEG.webp
HTML to WebP
Strong visual quality, transparency, and modern compression for web delivery.
Explore WebP.pdf
HTML to PDF
Paginated documents with page sizing, margins, backgrounds, and print styles.
Explore PDFExample code
Create a PNG image from your app
Choose a language and copy a complete request using this page's simple HTML and CSS example.
Loading code example
const apiId = process.env.HCTI_API_ID;
const apiKey = process.env.HCTI_API_KEY;
if (!apiId || !apiKey) {
throw new Error("Missing HCTI_API_ID or HCTI_API_KEY");
}
const authorization = `Basic ${Buffer.from(`${apiId}:${apiKey}`).toString("base64")}`;
const request = {
html: `<div class="card">
<h1>Hello, world!</h1>
<p>Generated from HTML and CSS.</p>
</div>`,
css: `.card {
width: 480px;
padding: 40px;
background: #f0fdf4;
color: #052e16;
font-family: sans-serif;
}`,
format: "png",
};
const response = await fetch("https://hcti.io/v1/image", {
method: "POST",
headers: {
Authorization: authorization,
"Content-Type": "application/json",
},
body: JSON.stringify(request),
});
if (!response.ok) {
throw new Error(`HCTI request failed: ${response.status} ${await response.text()}`);
}
const result = await response.json() as { url: string };
console.log(result.url);
Loading code example
Loading code example
Loading code example
Loading code example
Loading code example
Loading code example
Loading code example
Loading code example
Ready to render?
Create your first PNG from HTML and CSS
Send HTML and CSS to the API and receive a hosted .png image URL without running browser infrastructure.