Is my image uploaded to a server?

No. All processing runs in your browser using the Canvas API. Your image never leaves your device.

What sizes does the ICO file contain?

You can select any combination of 16x16, 32x32, 48x48, and 64x64. Having multiple sizes in one ICO lets the OS or browser pick the most appropriate resolution.

Why do I need multiple sizes in one ICO file?

Different contexts display icons at different sizes. Browsers use 16x16 for tabs and 32x32 for bookmarks. Windows uses 48x48 for desktop icons. Embedding all sizes ensures sharp display everywhere.

What input formats are supported?

PNG is the primary format. For best results use a square PNG with a transparent background. JPG files are also accepted but ICO transparency will be lost.

Is there a file size limit?

There is no hard limit, but very large images (over 4 MB) may be slow to process in the browser. For favicons a source PNG of 256x256 or 512x512 is ideal.

PNG to ICO Converter

Name: PNG to ICO Converter
Availability: InStock
Author: Nham Vu

Upload a PNG and download a multi-size ICO file with 16, 32, 48, and 64 px sizes — all in your browser.

Drop a PNG here or click to browse

PNG, JPG, WebP — square images work best

Sizes to include in ICO

16x16 32x32 favicon 48x48 64x64

Size Previews

Upload a PNG to see size previews

Your ICO file will be built in the browser

Summary

Upload a PNG and download a multi-size ICO file with 16, 32, 48, and 64 px sizes — all in your browser.

How it works

Upload or drag a PNG image onto the drop zone.
Select which icon sizes to include in the output ICO file.
Click "Convert to ICO" to generate the file.
Preview each size variant rendered on the canvas.
Click "Download ICO" to save the multi-size icon file.

Use cases

Creating favicons for websites that work across all browsers.
Generating Windows application icons from design exports.
Producing multi-resolution ICO files from a single source PNG.
Quickly testing how a logo looks at small icon sizes.
Making taskbar and desktop shortcut icons for Windows apps.
Converting brand logos to ICO format for browser tabs.

Frequently Asked Questions

Last updated: 2026-06-23 · Reviewed by Nham Vu