PNG to Favicon ICO Converter

Convert PNG images into multi-resolution Windows .ico favicon files (16x16, 32x32, 48x48).

How to Use

Upload PNG Logo

Select a clean square PNG logo file.

Build Binary Payload

Scale image and compile ICO binary header payload.

Download ICO

Save favicon.ico file for your web server root directory.

Generate Multi-Resolution Windows .ICO Favicons

Every website needs a standard favicon.ico file to display branding logos inside web browser tabs, bookmarks, and desktop shortcuts. Our PNG to ICO Favicon Generator packs multiple icon sizes (16x16, 32x32, 48x48, 64x64) into a single .ico binary file.

Generate website favicons 100% privately in your browser tab without server uploads.

Real-World Examples & Use Cases

Website & Web Application Favicons

Create standard favicon.ico files for HTML <link rel="icon" href="/favicon.ico"> embedding.

Windows Desktop Application Icons

Generate .ico icon assets for compiled Windows .exe software programs.

Browser Extension Icon Generation

Build multi-size icon packages for Chrome and Firefox extensions.

Confidential Brand Logo Protection

Generate brand favicons with 100% offline browser security.

How It Works

ICO Binary Packing Architecture: 1. ICONDIR Header: 6 bytes (Reserved: 0, Type: 1 for ICO, Count: N images). 2. ICONDIRENTRY Table: 16 bytes per image (Width, Height, ColorCount, Reserved, Planes, BPP, BytesInRes, ImageOffset). 3. Image Payload Data: Appends PNG or BMP binary payloads for each scaled resolution (16x16, 32x32, 48x48).

Frequently Asked Questions

What image size should I upload for creating a favicon?▼

A clean square PNG image of 512x512 pixels or 256x256 pixels produces the sharpest favicon output.

Does the output ICO file support transparent backgrounds?▼

Yes! Alpha channel transparency is preserved cleanly across all generated icon sizes.

Are my brand logos uploaded to a server?▼

No. The ICO binary file is compiled 100% locally inside your web browser RAM.

Where do I place the generated favicon.ico on my website?▼

Place favicon.ico in your website root directory (e.g. public/favicon.ico) and reference it in your HTML <head>.

Is this tool 100% free with no watermarks?▼

Yes! 100% free with zero watermarks.

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