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BMP to ICO Converter

Convert Windows BMP artwork into multi-resolution Windows .ico desktop application icons and browser favicons.





or drag & drop your BMP (.bmp) files here
🔒 100% In-Browser • Zero Files Uploaded to Cloud

Switch output to:

PNG

JPG

WEBP

GIF

SVG

HEIC

PDF

ICO

TIFF

⇄ Swap (ICO to BMP)

How to Convert BMP to ICO in 3 Simple Steps

1

Select or Drop Your BMP Files

Drag and drop your .bmp image files into the upload box above, or click 'Choose Files' to select one or multiple files from your device.

2

Instant In-Browser Conversion to ICO

Our local engine converts your BMP files into ICO format instantly using client-side Canvas and binary encoders. No server queues or wait times.

3

Download Converted ICO Files

Download each converted file with one click, or click 'Download All (.zip)' to save your entire batch in a single organized archive.

BMP vs ICO Technical Comparison Matrix

Feature BMP (.bmp) ICO (.ico)
MIME Type image/bmp image/x-icon
Compression Lossless Lossless
Alpha Transparency ✅ Supported ✅ Supported
Ideal Use Case Device-Independent Windows Bitmap storing uncompressed raw pixel arrays in BGR/BGRA structure. Windows Icon resource format capable of encapsulating multiple resolution layers for browser favicons.

Why Convert from BMP to ICO?

Website Favicon Compliance

Generate standards-compliant `favicon.ico` files recognized by all web browsers and search engine crawlers.

Retain Alpha Transparency

Icons maintain transparent backgrounds so your brand glyph floats cleanly above browser tab themes.

Optimized Icon Rendering

Square pixel scaling tailored for 16x16, 32x32, 48x48, and 64x64 desktop and mobile icon displays.

Frequently Asked Questions

What image aspect ratio is best when converting to ICO?
▾
Square images (1:1 aspect ratio, such as 512x512 or 256x256 pixels) produce the cleanest icon results. If your image is rectangular, our converter scales it proportionally into standard icon bounds.

Is this BMP to ICO converter completely free to use?
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Yes, 100% free with no hidden subscriptions, credit systems, daily conversion quotas, or account sign-up requirements. You can convert unlimited files anytime.

Are my uploaded images safe and private?
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Absolutely. This tool operates 100% client-side inside your web browser. Your images are never transmitted over the internet, never uploaded to external servers, and never stored or seen by anyone.

Can I convert multiple BMP files at the same time?
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Yes! Batch conversion is fully supported. You can upload dozens of files at once, monitor real-time conversion progress for each item, and download all converted files together as a single .zip archive.

Does this converter work on mobile phones and tablets?
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Yes, the converter is fully responsive and functions smoothly on iOS (iPhone/iPad), Android devices, Mac, Windows, Linux, and Chromebooks using any modern browser.