Free BMP to ICO converter

Why convert BMP to ICO?

People convert BMP to ICO because BMP stores every pixel uncompressed, so the files are enormous for what they actually contain, while ICO is what Windows icons and browser favicons actually require.

How to convert BMP to ICO

1. Choose your BMP file. Drop it on the box above, or tap to browse. You can pick several files at once.
2. Confirm the target is .ico. It is preselected when your browser can encode it; otherwise the closest available target is chosen. Adjust quality, size or the other options if you want to.
3. Convert and download. Press Convert, then Download. Your file stays on your device the whole time.

What is a .bmp file?

BMP stores pixels uncompressed, which makes files very large and very simple. It survives from early Windows and still appears in older software and some hardware exports; almost any modern format will store the same picture in a fraction of the space.

What is a .ico file?

ICO is the Windows icon container, used for favicons and application icons. One file can hold the same image at several sizes so the system can pick the right one; 16, 32, 48 and 256 pixels are the usual set.

What to expect from this conversion

The target format is lossless, so every pixel of the decoded image is preserved exactly. The result can be larger than the original, which is the normal trade for keeping full quality. Windows icons are capped at 256×256, so a larger picture is scaled down to fit.

Is it private?

Yes, by design. Every conversion happens inside your own browser using your device’s processor — there is no server that receives your BMP file, so there is nothing for anyone to store, scan or leak. You can confirm it yourself: open your browser’s developer tools, watch the Network tab while you convert, and you will see no upload.

Questions about BMP to ICO

Is this BMP to ICO converter free?

Yes, completely. There is no account, no daily limit, no watermark and no premium tier.

Is my BMP file uploaded to a server?

No. The conversion runs inside your own browser using your device's processor. The file is read from your disk, converted in memory and saved back to your disk — nothing is transmitted, so there is nothing for anyone to store.

Can I convert BMP to ICO online without downloading software?

Yes. This is an online BMP to ICO converter that runs in your browser, so there is nothing to install and no app to trust with your files. It works the same on a phone.

What happens to the quality?

The target format is lossless, so every pixel of the decoded image is preserved exactly. The result can be larger than the original, which is the normal trade for keeping full quality. Windows icons are capped at 256×256, so a larger picture is scaled down to fit.

How do I convert BMP to ICO on Windows, Mac or Linux?

The same way on all three: open this page in Chrome, Edge, Firefox or Safari, drop the BMP file, press Convert and download the ICO. Nothing is installed and no admin permission is needed.

Can I convert several BMP files at once?

Yes. Select as many files as you like and they are converted one after another in a single tap, with a download for each and a zip of all of them.

Should I keep the original BMP file?

Yes — keep it, converting never touches it. The reason to make a copy in another format is that BMP stores every pixel uncompressed, so the files are enormous for what they actually contain.

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