A container format commonly used for Windows icons and favicons.

Which image formats can I use?

Common browser-supported raster formats are supported.

Can it create multiple sizes?

Yes, choose available size options.

Will a rectangular image be cropped?

It may be fitted or cropped according to the selected mode.

Does ICO replace favicon tags?

No, the file still needs to be referenced by your site.

ICO Converter

Convert any image to a 32x32 favicon PNG.

Reading time:: 2 min
Last updated:: 5 August 2026
Price:: Free, no signup

Your file

Click to choose a fileAccepts: image/* · Processed locally in your browser

Results (live)

Choose a file to see the result.

What the ICO Converter does

Create a Windows icon file from a source image with commonly used icon sizes.

Turn a source image into a Windows icon file containing several standard sizes.

Why the ICO Converter is useful

Desktop shortcuts and legacy browser interfaces may require ICO rather than PNG or JPG assets.

Application shortcuts and desktop items need proper ICO files, and one source image can be packaged into every size Windows expects at once.

Also known as: ico converter, image to ico, favicon converter, free ico converter, online ico converter, ico converter online free, ico converter tool.

How to use the ICO Converter

1
Choose the source
Pick a square source image, ideally larger than the biggest icon size you need.
2
Adjust and process
Select a source image, choose target sizes, preview the icon, and download the ICO file.
3
Preview the sizes
Preview each generated size for legibility, then download the ICO.

Key features

Generates ICO from common raster image sources
Offers several icon dimensions
Previews the result before export

Benefits

One file serves every icon size Windows asks for.
Multiple sizes are packed together, so icons stay sharp at every zoom.

Real-life use cases

App icons

Build an application icon from a brand mark for a desktop utility.

Icon sets

Prepare a folder icon set from a single design.

Tips for the best results

Start with a square, high-resolution source to keep small icon sizes crisp.
Simplify the artwork; tiny icon sizes punish fine detail and thin lines.

Conclusion

Test the icon on a real desktop shortcut before shipping, because rendering there differs from any preview.

Frequently asked questions

What is ICO?: A container format commonly used for Windows icons and favicons.
Which image formats can I use?: Common browser-supported raster formats are supported.
Can it create multiple sizes?: Yes, choose available size options.
Will a rectangular image be cropped?: It may be fitted or cropped according to the selected mode.
Is conversion local?: Yes.
Does ICO replace favicon tags?: No, the file still needs to be referenced by your site.

Related tools you may need

Favicon Generator — Generate favicon PNGs at every common size.
Image Aspect Ratio Calculator — Compute the aspect ratio from width x height.
Image Border Adder — Add a clean solid-colour border around any image.
Image Circle Cropper — Crop any photo into a perfect circle avatar.
Image Sepia Filter Tool — Give any photo a warm vintage sepia tone.
Image File Size Calculator — Estimate uncompressed image file size from dimensions.
EXIF Metadata Viewer — Show basic EXIF fields stored in a JPG.
Image Brightness & Contrast Adjuster — Boost or dim brightness and contrast on any photo.

Keep exploring

Browse the full tools directory, filter by category, or read guides on the Text Tools Hub blog.