Which bit depths are supported?

BMP-in-ICO with 1/4/8/24/32bpp and PNG-in-ICO are supported.

What icon sizes are supported in an ICO file?

All image sizes stored in the ICO file from 16x16 to 256x256 can be displayed and inspected.

What if the ICO file contains multiple images?

ICO files can store images of multiple resolutions and bit depths. This tool lists and lets you inspect each one individually.

Are images sent to a server?

No. All processing is done in the browser. Your ICO file data is never sent to any external server.

Which browsers are supported?

It works in modern browsers such as Chrome, Firefox, Edge, and Safari.

ICO File Viewer - View All Contained Images

Simply drop an ICO file to view all images stored inside, at every size and bit depth. Supports BMP-in-ICO (1/4/8/24/32bpp) and PNG-in-ICO. All processing happens in your browser.

Drop an ICO file

or click to select

.ico files only

What is ICO File Viewer?

ICO is the Windows icon format that stores multiple images at different sizes and color depths in a single file. Each image is stored as BMP (with BITMAPINFOHEADER) or PNG.

How to Use

Drop or select an ICO file
All images contained in the file are listed

FAQ

Which bit depths are supported?: BMP-in-ICO with 1/4/8/24/32bpp and PNG-in-ICO are supported.
What icon sizes are supported in an ICO file?: All image sizes stored in the ICO file from 16x16 to 256x256 can be displayed and inspected.
What if the ICO file contains multiple images?: ICO files can store images of multiple resolutions and bit depths. This tool lists and lets you inspect each one individually.
Are images sent to a server?: No. All processing is done in the browser. Your ICO file data is never sent to any external server.
Which browsers are supported?: It works in modern browsers such as Chrome, Firefox, Edge, and Safari.

Related Tools

Update History

Last Updated: 2026-02-21

2026-02-21 Initial release