🖼️ ICO to PNG Converter

What is the ICO to PNG Converter?

An ICO file is the icon format Windows uses for application icons, shortcuts, and favicons. Its defining feature is that a single .ico file can bundle several versions of the same image at different sizes and color depths, for example 16x16, 32x32 and 256x256 pixels, so Windows can pick the sharpest one for the context it needs, whether that is a taskbar button or a desktop shortcut. A PNG, by contrast, is a single raster image at one fixed resolution. It is the standard lossless web and app image format, and unlike ICO it is universally supported by browsers, design tools, phones, and social platforms, which is exactly why people convert their icons to PNG in the first place.

This converter works by loading the ICO file you choose into the browser's built-in Image decoder through a temporary local object URL, the same mechanism browsers already use to display any image on a page. Once the browser has decoded the icon, the tool draws it onto an HTML canvas at its natural pixel size and exports that canvas as a PNG using the canvas.toDataURL method. No pixel data ever leaves your device: the entire decode, draw, and export sequence happens in JavaScript running locally in your tab.

There is one honest limitation worth knowing before you convert a multi-size icon. Browsers do not expose every embedded size inside a multi-size ICO to a web page; when an <img> or Image element loads a .ico, the browser's own logic picks one size to render, typically the largest or best match for the context, and that is the only size this tool (or any browser-based ICO tool) can extract. If you need every size baked into a multi-size icon pulled out separately, you would need a dedicated desktop icon editor rather than a browser tool, since browsers were never designed to unpack ICO containers, only to display one rendering of them.

Because PNG supports full transparency and this tool draws the decoded icon straight onto a blank canvas with no background fill, any transparent areas in the original icon, like the rounded corners common on app icons, stay transparent in the resulting PNG. That makes the output safe to drop straight onto colored backgrounds, dark mode UIs, or other images without a visible box around the icon.

When to use it

• Turning a Windows .ico icon into a PNG so it can be used in design tools like Figma or Photoshop, which do not open .ico files directly.
• Extracting a favicon.ico from an old website into a PNG to re-use or resize for a redesign.
• Preparing an app or browser extension icon for a store listing that requires PNG uploads instead of ICO.
• Converting a downloaded software icon into PNG so it can be embedded in documentation, a slide deck, or a help article.
• Getting a quick, private, one-off ICO to PNG conversion without installing an icon editor or uploading a file to an unfamiliar website.

How to use the ICO to PNG Converter

1. Click "Choose an ICO file" and select a .ico file from your device.
2. Wait for the note to confirm the icon loaded, along with its detected pixel dimensions.
3. Click "Convert to PNG" to decode and redraw the icon on a canvas.
4. Check the preview to confirm the icon looks right, including transparent areas.
5. Click "Download PNG" to save the converted file to your device.

Formula & method

Worked examples

ICO vs PNG at a glance

Common mistakes to avoid

• Expecting every embedded size to come out as separate PNGs. A multi-size ICO can hold several resolutions, but a browser-based converter can only extract the one size the browser chose to render. Extracting all embedded sizes needs a dedicated icon editor, not a browser tool.
• Assuming a corrupted or renamed file will still decode. If a file was renamed to .ico without actually being a valid icon container, or the file is damaged, the browser will fail to decode it and this tool will show a friendly error instead of a fake result.
• Not checking for transparency in the preview. Some icons use a solid background instead of transparency. Check the preview against the checkered background pattern before assuming the PNG is transparent.
• Uploading the ICO to an unfamiliar website instead of converting locally. Many online converters require uploading the file to a server. This tool decodes and converts entirely in your browser, so there is no upload and no wait for a remote service.

Glossary

ICO

The Windows icon file format, which can bundle multiple sizes and color depths of the same image inside one file.

PNG

Portable Network Graphics, a lossless raster image format with support for full transparency, widely supported across browsers, apps and design tools.

Object URL

A temporary local reference the browser creates to a file on your device, letting the page display or decode it without uploading it anywhere.

Canvas

An HTML element that lets JavaScript draw and manipulate pixel data directly in the browser, used here to redraw the decoded icon before export.

Transparency

Parts of an image with no color, allowing whatever is behind it to show through; both ICO and PNG can store this.

Natural size

An image's actual pixel width and height, as opposed to any size it is displayed at on a page.

Frequently asked questions