Convert ICO to BMP Online Free

Convert ICO icon files to uncompressed BMP bitmap format. Extract icons as raw bitmap images for use in Windows applications, image processing, or legacy software workflows.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

To convert ICO to BMP, drop your ICO file into the converter above. ChangeThisFile decodes the icon and exports it as an uncompressed BMP bitmap directly in your browser. The conversion is free, instant, and your files never leave your device. The output is raw pixel data.

Free No signup required Files stay on your device Instant conversion Updated March 2026

Convert ICO to BMP

Drop your ICO file here to convert it instantly

Drag & drop your .ico file here, or click to browse

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ICO vs BMP: Format Comparison

Key differences between the two formats

Feature	ICO	BMP
Purpose	Icons and favicons	Raw image data, Windows apps
Compression	Uncompressed or PNG-compressed	Uncompressed (raw pixels)
Transparency	Full alpha channel	Limited (32-bit only)
Multiple sizes	Embeds multiple sizes	Single image
Color depth	Up to 32-bit	Up to 32-bit
Typical dimensions	16x16 to 256x256	Any size
Platform	Cross-platform (icons)	Native to Windows

When to Convert

Common scenarios where this conversion is useful

Extracting icons for image editing

Convert ICO files to BMP for editing in paint programs and image editors that don't support ICO format natively.

Legacy software compatibility

Some older Windows applications and embedded systems accept BMP but not ICO for image input. Convert icons to BMP for these compatibility scenarios.

Icon asset documentation

When documenting icon sets, BMP provides a simple, universally readable format. Convert ICO files to BMP for inclusion in asset libraries and design documentation.

Raw pixel access for programming

BMP's simple uncompressed format makes it easy to read pixel data programmatically. Convert ICO to BMP for custom image processing scripts.

Who Uses This Conversion

Tailored guidance for different workflows

Designers

Convert ICO mockups to BMP for sharing with clients who need a universally compatible format
Transform ICO design assets to BMP for embedding in presentations or documents

Check the converted BMP at full zoom to verify no visible artifacts in gradients or fine details

Keep the original ICO as your master copy in case you need to re-export later

Web Developers

Convert ICO images to BMP for optimized loading on websites and web applications
Transform ICO assets to BMP for cross-browser compatibility in production builds

Test the converted BMP file in both Chrome and Safari to ensure consistent rendering

Consider the file size difference between ICO and BMP when optimizing page load speed

Photographers

Convert ICO photos to BMP for uploading to stock photography platforms or portfolios
Batch convert ICO images to BMP for delivering client galleries in a widely supported format

Use the highest quality setting when converting to BMP to preserve fine detail in your photos

Verify color accuracy after conversion, as ICO and BMP may handle color profiles differently

How to Convert ICO to BMP

1

Drop your ICO file

Drag and drop your ICO icon file into the converter area, or click browse to select it from your device.
2

Instant conversion

Your browser decodes the ICO and exports the pixel data as an uncompressed BMP bitmap. The largest embedded icon size is used.
3

Download your BMP

Save the converted BMP file. The output is an uncompressed bitmap with the same dimensions as the source icon.

Frequently Asked Questions

Will the BMP be larger than the ICO?

Usually yes, because BMP stores raw uncompressed pixel data. However, since icons are small (typically under 256x256), the BMP will still be a small file in absolute terms.

Is transparency preserved in BMP?

Standard 24-bit BMP doesn't support transparency. Transparent areas from the ICO will be filled with white. 32-bit BMP can store alpha data but not all applications support it.

Which icon size is extracted?

The converter uses the largest icon size embedded in the ICO file, giving you the best quality bitmap output.

Can I edit the BMP in Microsoft Paint?

Yes. BMP is the native format for Microsoft Paint and opens directly. This makes ICO to BMP conversion a quick way to edit icon artwork.

Why convert to BMP instead of PNG?

Choose BMP when you need raw uncompressed pixel data, compatibility with legacy Windows tools, or the simplest possible image format for programmatic access. For general use, PNG is usually better.

Is this converter private?

Yes. All processing happens in your browser. Your ICO files are never uploaded to any server, keeping your icon files completely private.

Can I convert BMP back to ICO?

Yes, ChangeThisFile also offers BMP to ICO conversion for creating icon files from bitmap images.

Does this work on Mac?

Yes. The converter runs in any modern browser. While BMP is a Windows format, Mac applications like Preview can open BMP files.

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Need to convert programmatically?

Use the ChangeThisFile API to convert ICO to BMP in your app. No rate limits, up to 500MB files, simple REST endpoint.

View API Docs

Read our guides on file formats and conversion

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