ICO to BMP converter

Convert ICO to BMP in your browser. No upload and no account: the file never leaves your device, so the only size limit is your device’s memory.

I have Choose files or drop them here, ICO files

I want BMP

Quality 90%

Background for transparent areas

Icon sizes

How to make the SVG

Tracing suits logos, icons and flat artwork and scales cleanly. Photos are better kept as pixels inside the SVG.

Colors to trace 16

Black below 50%

Dither Scatters black dots to suggest gray, instead of a hard cut-off.

Advanced 5

Keep the animation For animated GIF, WebP and APNG sources. Turn off to save just the first frame.

Rotate

Mirror horizontally

Mirror vertically

Resize: longest side

For an exact width and height, use the Resize Image tool instead.

Bytes of your files sent anywhere: 0 B · nothing leaves this tab

Need it the other way round? Convert BMP to ICO

Other ways to convert ICO

Convert other formats to BMP

Read more about the ICO format and the BMP format, or see every image tool and all image conversions.

Should you convert ICO to BMP?

A safe conversion when BMP is what you need: both ICO and BMP keep every pixel, so the picture itself doesn’t change.

ICO is a small container that holds the same icon at several sizes; BMP is an uncompressed grid of pixels. Use BMP only when a specific piece of software, a printer or an embedded device asks for it.

ICO and BMP compared
Property	ICO	BMP
Compression	Lossless	Uncompressed
Transparency	Yes	No
Animation	No	No
Support	Opens almost everywhere	Opens almost everywhere
Best for	Website favicons and Windows shortcuts	Old software and hardware that only understands raw bitmaps
Introduced	1985	1990

How to convert ICO to BMP

01
Add your ICO

Drop your ICO image onto the box, or click to choose it. It is read from your disk and stays there.
02
Check the settings

The output is already set to BMP. Change the quality if you want to; the defaults suit most files.
03
Save the BMP

Press convert and save the BMP. Several files come back together as a ZIP.

What changes when ICO becomes BMP

Nothing is discarded

ICO and BMP both keep every pixel, so the picture survives the move intact. You can convert back and forth as often as you like without it degrading.

BMP can’t hold transparency

Any transparent area in the ICO has to become a solid color, because BMP has no alpha channel. The background setting decides which color; white suits documents and most uploads, but pick the color of the page it will sit on if you know it, because it can’t be undone later.

Expect a much larger file

BMP is far bigger for the same content. Choose it because something needs BMP, not to send or store the file. ICO: A full favicon with every size is usually under 100 KB. BMP: A 12-megapixel image is about 36 MB.

This page is put together from our notes on each format, choosing only what is true of ICO and BMP, so every pairing states the same facts the same way. How these pages are made.

Why it doesn’t upload

Changing a picture’s format is work your browser already knows how to do. Sending your photos to a server first only adds waiting and risk, so nothing is sent.

How to check for yourself

Worth knowing

About the ICO. Renaming a PNG to favicon.ico works in some browsers and silently fails in others. A real ICO holds several sizes so each place picks the right one.
About the BMP. BMP looks like a safe “raw” choice, but a single photo can run to tens of megabytes and most sites refuse it.
DDS, PSD, EXR, XWD and JPEG 2000 are read by the FFmpeg engine, a one-time 31 MB download.

Questions

Will converting ICO to BMP lose quality?

No. ICO and BMP are both lossless, so every pixel is kept.

What happens to a transparent background when converting ICO to BMP?

BMP has no transparency, so transparent areas are filled with the background color you choose, white by default.