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BMP to ICO converter
Free BMP to ICO converter in your browser. Files stay on this device. Nothing is uploaded.
Drop images here
or click to choose. Paste works too.
Files never leave this device. Conversion runs in your browser.
Why convert BMP to ICO?
BMP is lossless (Windows-centric legacy interchange). ICO is lossless (icons and favicons that need the ICO container). Converting BMP to ICO remaps pixels into the target container in your browser. ICO can store transparency even if the BMP source did not.
What changes in the file
- Both formats are lossless; pixels stay bit-stable aside from color-space handling
- ICO can keep an alpha channel for later edits
- You can resize, adjust quality where relevant, and strip EXIF on export
- Conversion runs on this device — the file is not uploaded
How to convert BMP to ICO
- Drop one or more BMP files onto the converter (or pick them from disk).
- Confirm the output is set to ICO, then adjust quality, size, or metadata if needed.
- Download the converted ICO file — processing never left your browser.
About BMP
BMP is an uncompressed Windows bitmap format. It is simple and widely readable on Windows, but files are large compared with modern compressed formats.
About ICO
ICO is the Windows icon container format. It can hold one or more raster images at different sizes and is still used for favicons and desktop shortcuts.
Common questions
Is this BMP to ICO converter free?
Yes. Formatly converts BMP to ICO in the browser at no charge and without an account.
Do you upload my BMP files?
No. Decoding and encoding run locally with browser APIs and WebAssembly codecs when needed. Files stay on this device.
Will converting BMP to ICO reduce quality?
ICO is lossless, so the export keeps the decoded pixels. If the source was already lossy (BMP), prior compression artifacts remain.