Convert ICO to BMP
Ethical Tube's free ICO to BMP converter turns ICO icons into BMP, an uncompressed Windows image format. It runs entirely in your browser, so your icons are never uploaded, and it's free with no sign-up or watermark.
Files are converted on your device and never uploaded.
- Price
- Free
- Uploads
- None, it runs on your device
- Sign-up
- Not needed
- Batch
- Unlimited files
- Output
- BMP, lossless
- Install
- Nothing to install
How it works
How to convert ICO to BMP
Add your ICO files
Drop ICO files onto the converter, click to choose them, or paste from the clipboard. Add as many as you like.
Check the settings
BMP is already selected. Set a maximum width or height if you want smaller images.
Download your BMP images
Each file gets its own download button as soon as it's ready. Download all saves everything in one ZIP file.
The formats
ICO and BMP at a glance
What is an ICO file?
ICO is the Windows icon format, and it's also the classic format for favicons, the small icons shown in browser tabs. One ICO file can hold the same icon at several sizes, such as 16, 32, and 48 pixels, so each place it appears gets a sharp version. It opens in Windows, all browsers (as a favicon), macOS Preview, GIMP, and icon editors.
What is a BMP file?
BMP is the uncompressed bitmap format from early versions of Windows. It stores every pixel as is, so quality is perfect but files are large, often ten times the size of a PNG. Today it's mostly needed by older software, embedded devices, and some printers and label makers. It opens in Windows Paint and Photos, macOS Preview, browsers, and nearly every image editor.
Good to know
What changes when you convert ICO to BMP
- Both formats are lossless, so every pixel is kept exactly.
- BMP has no transparency, so transparent areas are filled with white. You can pick another background color.
- The largest size stored in the icon file is used.
- BMP files are saved uncompressed, so they're large but lossless.
- Metadata such as the camera model, date, and GPS location isn't copied to the new file, so you don't share your location by accident.
- Very large images, around 100 megapixels or more, can exceed what the browser allows, especially on phones.
FAQ
Questions, answered
Is this ICO to BMP converter free?
Yes. It's completely free, with no sign-up, no watermark, and no limit on how many files you convert. It costs Ethical Tube nothing to run, because the conversion happens on your own device rather than on a server.
Are my files uploaded anywhere?
No. The conversion runs inside your browser with the browser's built-in image codecs plus small WebAssembly encoders, so your files never leave your device. Once the page has loaded, it even works offline.
Does converting ICO to BMP lose quality?
No. BMP is lossless, so the converted image has exactly the pixels of the ICO.
What happens to transparent backgrounds?
BMP can't store transparency, so transparent areas are filled with white by default. You can choose any other background color before converting.
Can I convert several ICO files at once?
Yes. Add as many as you like. They're converted one after another, and you can download each BMP file as soon as it's ready or all of them in one ZIP file.
Does it work on iPhone, Android, Mac, and Windows?
Yes. It works in Chrome, Edge, Firefox, and Safari, on computers, iPhones, and Android phones.
What can open a BMP file?
Windows Paint and Photos, macOS Preview, browsers, and nearly every image editor.
Is there a file size limit?
There's no upload limit because nothing is uploaded. The practical limit is your device's memory: everyday files are fine, and most computers handle images up to about 100 megapixels.
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