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Favicon ICO File Generator
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ICO Generator

Convert standard images into multi-resolution .ico favicon files locally.
Last updated: July 7, 2026•100% Client-Side & Private
Favicon Packing Options
Target Resolutions

Select the resolutions you want to pack into the single `.ico` file container:

Favicon Preview & Download
Upload a high-resolution square image to begin favicon generation...

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About this Tool

Generate standard, multi-resolution website favicons from your images locally.

1What is an ICO file?

An ICO Generator is a favicon creator that converts images (like PNG or JPEG) into standard multi-resolution .ico icon containers. It exports multiple dimensions (16x16, 32x32, 48x48) into a single file buffer locally. The generator runs client-side to keep branding assets private. Additionally, the utility generates clean, standardized code syntax that complies with modern web validation standards and SEO guidelines. The responsive layout makes it easy to format, edit, and copy outputs on both mobile viewports and desktop workstations. This local execution model bypasses browser network dependencies, offering a snappy user experience for editing frontend stylesheets, vector assets, and HTML layouts. By utilizing local browser sandbox isolation and client-side processing, Secure Devutils protects your intellectual property and private credentials from external logging pipelines and third-party data tracking networks. For more details, explore our blog articles: Why Offline-First Developer Tools Matter and The Hidden Risks of Online Developer Tools.

2How does this ICO generator work without a server?

The generator redraws your uploaded image onto multiple offscreen canvases, one for each size you select. It exports each canvas as PNG data and packs the raw PNG byte streams together into a single binary buffer conforming to the standard ICO format.

3What sizes should I include in my Favicon?

The standard recommended favicon sizes are: • 16x16: address bars and tab icons. • 32x32: bookmark lists and taskbar icons. • 48x48: desktop shortcuts.

4Privacy: Are my icons safe?

Yes, everything is processed in-memory inside your local web browser. Your source graphics and final .ico assets are never transmitted or logged.

Privacy Guarantee

The Favicon ICO File Generator operates 100% locally in your web browser. All image processing, resizing, scaling, and format conversions occur completely in your local browser sandbox. Your uploaded PNG, JPEG, SVG, or ICO files are never uploaded to any remote server.