How do I create a favicon (ICO file)?

Upload your image (ideally 512x512 or larger PNG), select ICO as output, and our converter will create a multi-size ICO file containing 16x16, 32x32, and 48x48 pixel versions.

What size should my favicon be?

Create your source image at 512x512 pixels minimum. ICO files contain multiple sizes (16x16, 32x32, 48x48). Our converter automatically generates all required sizes from your upload.

Convert to ICO – Free ICO Converter

Convert to ICO

Convert images instantly between JPG, PNG, WebP, GIF, TIFF, and more.
Perfect for web optimization, social media, and print-ready graphics.

Free tier: 5 conversions/day, files up to 50 MB, ad-supported. Need more? See Pro plans →

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Lightning-fast conversionsProcess files in seconds, not minutes

All major image formatsJPG, JPEG, PNG, GIF & more

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Files auto-deleted in 1 hourGDPR-friendly: we never keep your files

ICO is Windows' native icon format, containing multiple icon sizes and color depths in a single file. Every Windows application shortcut, browser favicon, and system icon uses the ICO format.

Convert to ICO – Free Online ICO Converter

About the Windows Icon (ICO) Format

Contains multiple images at different sizes (16x16 to 256x256). Supports transparency. Can include PNG-compressed images.

Common Use Cases for ICO

Website favicons
Windows application icons
Desktop shortcuts
System tray icons

Pros of ICO

Multiple sizes in one file
Native Windows support
Favicon compatibility
Transparency support

Cons of ICO

Windows-centric
Complex structure
Limited to icons
Larger than single images

How to convert files to ICO

Upload your file using the area above.
Select ICO as the target format.
Click Start and wait for the conversion to finish.
Download your converted ICO file.