Convert PNG to ICO offline
Convert local PNG files to ICO files offline by JavaScript in your web browser without any software downloads or file uploads!
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How to convert PNG to ICO offline
Choose local PNG image files, choose "ICO" as target image format, then click the "CONVERT OFFLINE" button to start offline conversions in bulk. File size can be up to 2GB.
This offline converter will try to use canvas in web browser to convert images first. The image format depends on whether your current web browser supports. For example: the latest Chrome browser supports AVIF images while some old versions don't. Then the offline converter will try to use JavaScript to convert images if your current web browser doesn't support the image format. Use online converter instead if this offline converter doesn't work in your web browser.
| Name | PNG | ICO |
| Full name | Portable Network Graphics | Microsoft Icon |
| File extension | .png | .ico |
| MIME | image/png | image/x-icon, image/vnd.-microsoft.icon |
| Developed by | PNG Development Group | Microsoft |
| Type of format | Lossless bitmap image format | Graphics file format for computer icons |
| Introduction | Portable Network Graphics (PNG) is a raster graphics file format that supports lossless data compression. PNG was created as an improved, non-patented replacement for Graphics Interchange Format (GIF), and is the most used lossless image compression format on the Internet. PNG itself does not support animation at all. MNG is an extension to PNG that does; it was designed by members of the PNG Group. | The ICO file format is an image file format for computer icons in Microsoft Windows. ICO files contain one or more small images at multiple sizes and color depths, such that they may be scaled appropriately. In Windows, all executables that display an icon to the user, on the desktop, in the Start Menu, or in Windows Explorer, must carry the icon in ICO format. |