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ICO Generator.

Convert PNG, JPG, or SVG to multi-resolution ICO files client-side. Select sizes from 16x16 to 256x256, keep transparency, and compile icons instantly.

Upload Image Source

Upload Photo / SVG Drag & drop or click · PNG, JPG, WebP, SVG

ICO Configuration

Favicons typically use 16, 32, and 48. Desktop application icons use 256.
Icon Pack Workspace
Upload an image and compile multi-res Windows or Tab icons

About ICO Generator

ICO Generator is a high-performance web utility built to convert PNG, JPG, or SVG to multi-resolution ICO files client-side. Select sizes from 16x16 to 256x256, keep transparency, and compile icons instantly instantly and securely. Because it is designed with a local-first architecture, all processing occurs directly in your browser's memory using client-side JavaScript. This ensures that your files, code, or private text inputs are never uploaded to any external server or tracked by third-party analytics.

Whether you are formatting source code, cleaning text files, converting file structures, or running diagnostics, running these processes locally in your browser memory sandbox eliminates network latency and protects your data privacy.

Frequently Asked Questions (FAQs)

What is an ICO file used for?

An ICO file is an image file format specifically designed for Windows icons and website favicons. It can store multiple images of different resolutions and color depths in a single file so that Windows or web browsers can display the correct size automatically.

Which sizes should I select for a website favicon?

For a standard website favicon.ico, we recommend selecting 16x16, 32x32, and 48x48. This covers standard tabs, bookmark bars, and desktop shortcuts.

Are transparent backgrounds preserved in the generated ICO?

Yes. The tool wraps the selected resolutions as PNG frames inside the ICO file container, preserving all original alpha transparency values.

Does this tool upload my image files to any server?

No. The entire process of resizing, rendering, and packaging binary headers is done completely client-side inside your web browser. No files are uploaded.

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