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View ICO Files Online

Use this free tool to view your ICO (Icon) files online without needing to download or install any software. Our ICO viewer tool will render your file within the browser with the ability to view full screen if needed.

How to View your ICO File Online?

Here are two simple steps to display your ICO file in any web browser.

Upload an ICO

Click the "Upload a File" button and select an ICO to upload. The maximum file size is 100MB.

View your ICO

Once processed, your ICO file will be displayed in the web browser.

Frequently Asked Questions

How can I view my ICO file online?

First, click the "Upload..." button and select the ICO file you wish to view. Once your ICO file has been received it will be displayed in your browser.

How long does it take to view my ICO file?

We aim to process all ICO file viewing requests as quickly as possible, this usually takes around 5 seconds but can be more for larger or more complex files so please be patient.

How accurate is the ICO file viewer?

We aim to create the most accurate rendition of your ICO file with our tools. Our tools are under constant development with new features and improvements being added every week.

Is it safe to view my ICO file on ImageToStl.com?

Yes, of course! We do not store the ICO file you submit. The generated preview file within your browser is deleted after 15 minutes,

Can I view my ICO file on Windows, Linux, Android, iOS or Mac OS?

Yes! Our ICO file viewer will run on any system with a modern web browser. No specialist software is needed to use our file viewing tools.

ICO Features

  • Supports Lossy Compression
  • Supports Non Lossy Compression
  • Supports Transparency
  • Supports Color Palettes
  • Supports Monochrome (1-Bit)
  • Supports 16 Colors (4-Bit)
  • Supports 256 Colors (8-Bit)
  • Supports 16 Million Colors (24-Bit)

File Format Information for ICO

Full NameIcon
Mime Typeimage/x-icon
ToolsICO Converters, Create Cookie Cutter, ICO Viewer


The ICO file is an image format that started life on Microsoft Windows 1.0 and was used exclusively for storing image icons used by the operating system. Back then, ICO files were limited in size to 32x32 pixels with only two colors. With subsequent versions of Windows, the format has been amended and upgraded to support larger images with more colors.

Although the initial ICO format was not compressed due to their already small sizes (and limited computing power to decompress them in real-time), as the size of image icons has increased over the years, Microsoft recommends that for larger icon files, PNG compression be used for storing the raster data.

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