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BMP to ICO Converter

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Convert BMP images into a proper multi-resolution .ico file right in your browser. BMP bitmaps convert directly into the .ico container, which itself is descended from the BMP format — making it a natural, lossless source for Windows icons. Choose the sizes you need, click download, and get a standards-compliant icon with embedded PNG frames.

Drag an image here, paste from clipboard (Ctrl+V), or

Supports PNG, JPG, WEBP, GIF, BMP

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How to use BMP to ICO

  1. Drag and drop your BMP file onto the upload zone, paste it from the clipboard, or click Browse to select it.
  2. Tick the sizes you want inside the .ico — 16×16 and 32×32 are on by default; add 48, 64, 128, or 256 as needed.
  3. Click Download .ico to generate and save your multi-resolution icon instantly.

What is BMP to ICO?

BMP bitmaps convert directly into the .ico container, which itself is descended from the BMP format — making it a natural, lossless source for Windows icons. The ICO format can hold several resolutions in one file, letting Windows and browsers automatically pick the best size for each context — from a 16×16 taskbar icon to a 256×256 high-DPI display icon.

This BMP-to-ICO converter runs entirely in your browser using the Canvas API and pure JavaScript, so your image is never uploaded to any server and stays completely private. Each chosen size is embedded as a lossless PNG frame inside the ICO container — the modern, recommended approach. BMP files are uncompressed, so a large source bitmap gives the sharpest downscaled icon sizes.

It is the fastest way to turn a BMP logo or graphic into a real .ico file for a Windows application, a browser extension, or a website favicon that needs legacy-browser support.

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FAQ

How do I convert BMP to ICO?
Upload your BMP image, choose the icon sizes you want to include, and click Download .ico. The conversion happens instantly in your browser with no upload required.
Is my image uploaded to a server?
No. The entire conversion runs locally in your browser using the Canvas API, so your image never leaves your device.
What size should the source image be?
Use a square source of at least 256×256 pixels so every smaller icon size is a sharp downscale rather than a blurry upscale.

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