Convert PNG to ICO
To convert PNG to ICO, drop your PNG into the converter on this page and press Convert to ICO. Your browser resizes the image to the standard icon sizes and packs them into one .ico file locally, so the image never leaves your machine.
Runs in your browser. Your file never leaves your device.Drop your PNG hereChoose a PNG to convert
It becomes a ICO right in your browser, up to 100 MB
Your file never leaves your device
Works in airplane mode. See the proof
Limits, published exactly
| Where it runs | In your browser. The file never leaves your device. |
|---|---|
| Free conversions | Unlimited. No account, no ads, no queue, no watermark. |
| Max file size, free | 100 MB |
Why convert PNG to ICO?
A favicon is the little image in a browser tab, and browsers still look for it as an .ico. The format is unusual in that one file holds the same picture at several pixel sizes, letting the system pick the crisp version for a tab, a bookmark bar or a pinned shortcut. Designers work in PNG, so turning a square PNG logo into an .ico is the last step before dropping a favicon into a site. Doing it in the browser keeps an unreleased brand mark off the favicon-generator services that would otherwise receive it.
What is PNG?
PNG (Portable Network Graphics) is a lossless image format from 1996. It compresses with DEFLATE, keeps every pixel exactly as authored, and supports a full 8-bit alpha channel for transparency. That makes it the default choice for screenshots, UI mockups, logos and anything with sharp edges or text. The tradeoff is size: photographs stored as PNG are often several times larger than a visually identical lossy file.
What is ICO?
ICO is the Windows icon container, and the format browsers still expect for a favicon. One .ico holds the same picture at several sizes, so the system can pick the right one for a tab, a taskbar, or the desktop. Building one means resizing a source image to those standard sizes and packing them together.
Quality and what to expect
The PNG is scaled into the common icon sizes from 16 up to 256 pixels and embedded as PNG inside the .ico, the modern form every current browser and operating system reads. Start from a square, simple image: tiny favicons lose fine detail, so a busy logo or thin text can turn muddy at 16 pixels. Transparency is preserved, and a non-square source is centered within each square with transparent margins rather than stretched.
PNG to ICO FAQ
What sizes are inside the .ico?
Six squares, from 16 by 16 up to 256 by 256, all packed into the single file so the browser can choose the right one for each place it shows the icon.
Should my source be square?
Ideally yes. A square image fills the icon cleanly; a rectangular one is centered with transparent padding so it is not distorted, which means some empty space around it.
Does my logo get uploaded?
No. The image is resized and packed into the .ico by your browser, so an unreleased logo never reaches a favicon service or any server.