Free online HTM to PNG converter

What the HTM format is

HTM is an HTML file extension used for web pages and local web documents. An .htm file contains markup for text, links, tables, forms, and media references; CSS controls presentation, and JavaScript can change the page after loading. The .htm and .html extensions represent the same HTML format, although .htm was useful on systems that required three-character extensions.

Browsers such as Chrome, Firefox, Edge, and Safari open HTM files. Web editors, content-management systems, static-site generators, and older Windows applications can create them. An HTM file may depend on adjacent CSS, JavaScript, image, font, and media files, so copying only the HTML file can produce an incomplete rendering.

What the PNG format is

PNG (Portable Network Graphics) is a raster image format that stores a rendered picture as pixels. It supports lossless compression, transparency, and full-color images, making it suitable for screenshots, interface mockups, diagrams, logos, and graphics with sharp text or flat-color areas.

PNG does not retain HTML links, semantic structure, CSS rules, scripts, selectable text, responsive behavior, or interactivity. Use it when a fixed visual representation is required rather than an editable or interactive web page.

How to convert HTM to PNG

Using a web browser

1. Keep the HTM file with its referenced folders, such as css, images, and fonts. Correct relative paths are required for those assets to load.
2. Open the file in Chrome, Edge, Firefox, or another current browser by double-clicking it or choosing Open with.
3. Set the required viewport width by resizing the browser window or using the browser's device emulation tools. Responsive pages can use a different layout at each width.
4. Capture the rendered page with the browser's screenshot feature, an operating-system screenshot tool, or developer tools.
5. Save the image as .png and check it for clipped content, missing fonts, unloaded images, and incorrect responsive layout.

In Chrome or Edge, open developer tools with Ctrl + Shift + I on Windows or Linux, or Cmd + Option + I on macOS. Open the command menu, run Capture full size screenshot, and save the resulting PNG. Use the device toolbar first if the page must be captured at specific dimensions. A full-size capture includes the complete scrollable document; a normal screenshot captures only the visible viewport.

Using 101convert

You can convert the file for free on 101convert.com without installing software. Upload the HTM file, select PNG if an output-format choice is shown, start the conversion, and download the image. If the page uses separate CSS, images, fonts, or scripts, provide the related files when the converter supports an archive or asset upload; otherwise those resources may not appear in the result.

Using Playwright for repeatable captures

Playwright is suitable for automated or batch screenshots because it uses a browser engine and can set a fixed viewport. After installing Playwright and its Chromium browser, a Node.js script can use:

const { chromium } = require("playwright");
(async () => {
  const browser = await chromium.launch();
  const page = await browser.newPage({ viewport: { width: 1440, height: 900 } });
  await page.goto("file:///absolute/path/page.htm", { waitUntil: "networkidle" });
  await page.screenshot({ path: "page.png", fullPage: true });
  await browser.close();
})();

Replace the file URL with the HTM file's absolute path. Set fullPage to false when only the viewport is required. For pages that load content after network activity stops, wait for the relevant selector or add a short delay before taking the screenshot.

Quality and compatibility limitations

PNG dimensions depend on the browser viewport and device pixel ratio. Increase the viewport or device scale factor when small text must remain readable, but expect a larger file. A screenshot is not a print-layout conversion: fixed-position elements, animations, lazy-loaded images, and hover states can produce different results depending on capture timing.

Local browser security rules can block scripts, fonts, or resources loaded from other locations. Keep required assets locally available, use valid relative paths, and wait for web fonts and images to finish loading. PNG preserves captured pixels without JPEG-style compression losses, but it is usually larger than JPEG for photographic content and cannot preserve the original page's text, links, or behavior.