What sizes does the ICO contain?

Up to six — 16, 32, 48, 64, 128 and 256 pixels square — all in the one file, so the browser can choose the right one for a tab, a bookmark or the address bar. Only sizes up to your source image are included; anything larger is left out rather than upscaled. The one exception is 16 pixels, which every icon has: an image smaller than that is enlarged to 16×16 so the icon is never empty.

My logo is not square — what happens?

It is centred on a transparent square so it keeps its shape rather than being stretched to fit. For the tidiest result, start from a square image; a wide logo will have transparent space to its left and right in the icon.

Is the transparency kept?

By default, yes — the icon keeps a full alpha channel, so a transparent PNG sits cleanly on a light or dark tab. Turn off ‘Keep transparency’ if you would rather fill the transparent areas with white for a solid tile.

Where do I put the .ico file?

Most sites place it at the site root as favicon.ico, or reference it with a link tag in the page head. A single multi-size ICO like this one covers the common cases without needing separate files per size.

Is this converter free?

Yes. Every conversion on ConvertNicely is free to use, with no account and no watermark on the result. Everyone can run 50 jobs and upload 2 GB a day, with or without an account.

What happens to my files?

Your uploaded file is deleted from our servers the moment the conversion finishes, whether it succeeded or failed. The converted result is deleted automatically one hour later, and you can delete it yourself at any time with the Delete button.

Is there a file size limit?

Files up to 50 MB are accepted for this conversion. Larger limits apply to paid plans in future, but the free limit is generous enough for the overwhelming majority of ICO conversions.

Do I need to install anything?

No. ConvertNicely runs entirely in your browser and on our servers, so there is nothing to download or install. It works the same on Windows, macOS, Linux, Android and iOS.

Does it work on a phone?

Yes. The whole site is built mobile-first, so you can upload from your camera roll or files app, convert, and download the result without leaving your browser.

Free

Convert PNG to ICO

A favicon is the little icon in a browser tab, and browsers still ask for it as an ICO — a single file that carries the same picture at several sizes so the browser can pick the one it needs. This fits your PNG onto a square and builds that multi-size ICO, keeping transparency so the icon sits cleanly on any tab colour.

Also known as: PNG to ICO converter · favicon generator · make a favicon

Files up to 50 MBTypically under a minute

Drop your file hereor choose a file from your devicePNG · up to 50 MB

Encrypted upload · deleted right after conversion

Your files are deleted automatically

Uploads are removed as soon as processing finishes, and converted files are deleted after 1 hour. Read our privacy policy.

How to convert PNG to ICO

Step 1
1. Add your PNG file
Drag your PNG file into the box, or choose it from your device. It can be up to 50 MB.
Step 2
2. Choose your settings
Adjust Keep transparency (on), or keep the starting values in brackets, which suit most files.
Step 3
3. Press Convert to ICO
The work happens on our servers, and you can follow its progress.
Step 4
4. Download your ICO file
Your upload is already deleted, and the result is deleted after one hour.

Worth knowing

A non-square PNG is centred on a transparent square so it is not stretched, which can leave space at the sides. The icon is built down from your image, never scaled up past it, so a small PNG produces fewer sizes — start from at least 256×256 for the full set. Only an image under 16 pixels is enlarged, to the 16×16 size every icon needs. Transparency is kept; a PNG with no transparency simply gets a solid icon.

Why convert PNG to ICO?

Making a favicon.ico for a new website from a logo
Replacing a blurry favicon with crisp 32 and 48 pixel versions
Turning a transparent PNG mark into a browser tab icon
Producing the favicon an older framework or CMS expects as .ico

PNG vs ICO

Comparison of PNG and ICO
Property	PNG	ICO
File	One PNG, one size	One ICO, several sizes
Sizes	As supplied	Down to 16, 32, 48, 64, 128, 256 px
Transparency	Supported	Kept
Use	General image	Browser tab icon

Frequently asked questions

Page updated 21 October 2026

All Image converters

Convert PNG to ICO

How to convert PNG to ICO

1. Add your PNG file

2. Choose your settings

3. Press Convert to ICO

4. Download your ICO file

Why convert PNG to ICO?

PNG vs ICO

Frequently asked questions

JPG to ICO

WebP to ICO

PNG to WebP

SVG to PNG

Convert PNG to ICO

How to convert PNG to ICO

1. Add your PNG file

2. Choose your settings

3. Press Convert to ICO

4. Download your ICO file

Why convert PNG to ICO?

PNG vs ICO

Frequently asked questions

What sizes does the ICO contain?

My logo is not square — what happens?

Is the transparency kept?

Where do I put the .ico file?

Is this converter free?

What happens to my files?

Is there a file size limit?

Do I need to install anything?

Does it work on a phone?

Related conversions

JPG to ICO

WebP to ICO

PNG to WebP

SVG to PNG