PNG to ICO

Convert a PNG image into a multi-size .ico favicon file, right in your browser — the format browsers and operating systems expect for favicons and desktop shortcuts.

Click or drag a PNG image here

Includes multiple sizes in one .ico file (the standard favicon format), so the browser or OS picks the sharpest one for the context. Processing happens entirely in your browser.

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Why use PNG to ICO?

The .ico format predates modern web favicons but is still the safest, most broadly compatible choice — it's what browsers fall back to when no other favicon format is specified, and it's still what Windows expects for desktop shortcut icons. Unlike a single PNG, one .ico file can contain several sizes at once, letting the browser or OS choose the sharpest version instead of stretching a single image. This builds a proper multi-size .ico directly in your browser by embedding PNG-encoded image data for each selected size in the standard ICO container format — the same approach modern icon files use, so the result works correctly in current browsers and operating systems without needing desktop software.

Key benefits

Multiple sizes embedded in one .ico file
No software install required
Processing happens entirely in your browser
Free, unlimited conversions

Features

Selectable output sizes from 16×16 to 256×256
Standard ICO container format (Vista+ compatible)
Instant download after conversion

Popular use cases

Creating a favicon.ico for a website
Converting a logo to an .ico for a Windows desktop shortcut
Generating an app icon in the format a build tool expects
Replacing an outdated single-size favicon with a proper multi-size one

How to use PNG to ICO

1
Upload a PNG image
Ideally square, at least 256×256 for best results.
2
Pick which sizes to include
16×16 through 256×256.
3
Convert and download
Get a single .ico file with all selected sizes embedded.

Frequently asked questions

Why does a favicon need multiple sizes in one file?

Different contexts request different sizes — a browser tab typically uses 16×16 or 32×32, while a bookmark or desktop shortcut may use a larger size. A multi-size .ico lets the browser or OS pick the sharpest version for each context instead of scaling one image up or down.

What's the best source image size?

Start with a square PNG at least 256×256 — the tool downsamples for smaller sizes, but it can't add detail that isn't in the original, so starting small and scaling up produces blurrier results at the larger sizes.

Do modern browsers still need .ico, or does PNG work directly?

Most modern browsers accept a PNG favicon directly via a link tag, but .ico remains the universal fallback — some contexts (older browsers, some OS-level shortcuts) still specifically expect it, which is why it's still generated as a distinct format.

Last reviewed: September 2026

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