PNG to ICO Converter - Convert Images to ICO
Convert PNG, JPG, JPEG and WebP images to real multi-size Windows ICO icon files directly in your browser.
Click or drag & drop an image here
Supports PNG, JPG, JPEG and WebP
Your images are processed locally in your browser and are not uploaded to our server.
What is an ICO File?
ICO is the icon file format used by Microsoft Windows. Unlike a regular PNG or JPG, an ICO file is a container that can hold multiple images at different sizes, letting Windows pick the right resolution for each context — taskbar, desktop, file explorer, and more.
A single ICO file typically stores the same icon at several sizes (for example 16×16, 32×32 and 256×256) so the icon looks sharp everywhere it appears.
How to Convert PNG to ICO
- 1
Upload your PNG image.
- 2
Choose the icon shape — Original, Rounded Square or Circle.
- 3
Select the icon sizes you need.
- 4
Click Generate to build the ICO file.
- 5
Download your multi-size ICO or individual sizes.
PNG vs ICO
PNG is a general-purpose raster image format. ICO is a format designed specifically for icons and favicons, with the ability to embed several image sizes in one file.
Because ICO is a structured container format, you cannot convert a PNG to ICO simply by renaming the file extension. The image data must be re-packaged into a valid ICO header with directory entries.
This tool performs that real conversion — decoding your image, resampling it, and writing a proper ICO binary structure.
What Sizes Can an ICO File Contain?
An ICO file can contain images at 16×16, 24×24, 32×32, 48×48, 64×64, 128×128 and 256×256 pixels. A single ICO can bundle several of these sizes into one file.
Different Windows UI contexts use different sizes, so a multi-size ICO is more practical than one containing only a single resolution. There is no single size that fits every scenario.
Can I Convert JPG to ICO?
Yes. This tool decodes JPG images in your browser and re-encodes them into an ICO file. Note that JPG does not support transparency, so the result will not have an alpha channel.
Can I Convert WebP to ICO?
Yes. The tool first decodes the WebP image in your browser, then generates the ICO file. WebP images with transparency keep their alpha channel in the output.
Does This ICO Converter Upload My Image?
No. Your image is processed entirely in your browser using local Canvas and ImageBitmap APIs. It is never uploaded to a server, stored in localStorage, or sent to any analytics service.
Frequently Asked Questions
What is an ICO file?
An ICO file is the icon format used by Microsoft Windows. It is a container that can hold one or more images at different sizes so Windows can display the icon clearly at any resolution.
How do I convert PNG to ICO?
Upload your PNG, choose a shape and the sizes you need, then click Generate. The tool decodes the image, resamples each size, and writes a valid ICO binary file for you to download.
Can I convert JPG to ICO?
Yes. JPG images are decoded in the browser and re-encoded into ICO. Keep in mind that JPG has no transparency, so the resulting icon will not have an alpha channel.
Can I convert WebP to ICO?
Yes. The tool decodes WebP locally and builds the ICO from the decoded pixels. Transparent WebP images keep their transparency in the output.
Can an ICO file contain multiple sizes?
Yes. A single ICO file can contain many image entries at different sizes. This converter can generate a multi-size ICO containing all the sizes you select.
What size should an ICO file be?
There is no single correct size. Different parts of Windows use different sizes, so the best approach is to include several — commonly 16, 32, 48, 64, 128 and 256 pixels.
Can I create a circular ICO icon?
Yes. Choose the Circle shape and the tool will crop your image into a circle with a transparent background. The shape is applied to the actual image data, not just the preview.
Can I create a rounded square ICO icon?
Yes. Choose the Rounded Square shape to crop the image with rounded corners and a transparent background, applied directly to the output image.
Does this converter upload my image?
No. All processing happens locally in your browser. Your image never leaves your device and is not stored or shared anywhere.
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