This PNG to ICO converter works in your browser on any computer or phone. Convert PNG images to ICO online for free. Upload one file or many, choose the quality and maximum size, then download the ICO results one by one or all together in a ZIP. No sign-up needed.
Websites use an .ico file as the favicon, the small icon in browser tabs and bookmarks, and Windows uses .ico for program and folder icons. One .ico file can hold several sizes, so it looks sharp everywhere.
Keep the PNG: modern browsers also accept PNG favicons, and you will need it again to make other sizes.
PNG stores images with lossless compression and supports full transparency, which makes it the usual choice for logos, screenshots and graphics with sharp edges. The trade-off is size: a photograph saved as PNG is normally far larger than the same photo saved as JPG or WebP.
More PNG conversionsICO is the Windows icon format, and browsers also use it for favicons. A single .ico file can hold several sizes of the same icon, from 16x16 up to 256x256, so the right one is shown wherever it is needed.
More ICO conversions| Feature | PNG | ICO |
|---|---|---|
| Full name | Portable Network Graphics | Windows Icon |
| Compression | Lossless | PNG or BMP images inside |
| Transparency | Yes | Yes |
| Animation | No | No |
| Introduced | 1996 | 1985 |
| Developed by | PNG Development Group (W3C) | Microsoft |
| Best for | Logos, screenshots and graphics with transparency | Favicons and Windows icons |
Browsers mainly use 16 and 32 pixels in tabs and larger sizes for shortcuts. The ICO made here contains all the common sizes up to 256 pixels.
Upload it to the main folder of your website so it is available at yoursite.com/favicon.ico. Most browsers look there automatically.
Click Select File or drop your PNG file onto the upload box. Pick the quality and maximum size, and the converted ICO appears in the list below with a download button. You can add many files at once and download them together as a ZIP.
Yes. There is no sign-up and no watermark. To keep the service available for everyone there is a 95MB limit per file and a cap on how many files one connection can process in a short period.
Your upload is used only to make the converted file. Images are processed in memory; other files are written to a private temporary folder that is deleted as soon as the conversion finishes. Nothing is kept after the result has been sent back.
For images, a little, by design: the image is re-encoded at the Quality you choose (default 75%). Audio and video are re-encoded with high-quality settings; documents keep their text and layout as far as the target format allows. Converting never restores detail that is already missing from the original.