Does BMP to ICO upload my file or text to Tool-You servers?

No. BMP to ICO runs in this browser tab. Files stay on the device. Limit note: 32-bit ICO. Max 20 MB.

Should I use PNG to ICO instead of BMP to ICO?

Use BMP to ICO when you need Encode a BMP still as ICO. Use PNG to ICO when you need Make a favicon ICO from a PNG. They share a category (Images) but not the same job.

BMP to ICO

Encode a BMP still as ICO.

Decodes BMP then writes a 32-bit ICO. Unlike PNG to ICO this starts from BMP. Unlike JPG to ICO this is an uncompressed raster. Max 20 MB.

What BMP to ICO does

Decodes BMP then writes a 32-bit ICO. Unlike PNG to ICO this starts from BMP. Unlike JPG to ICO this is an uncompressed raster. Max 20 MB.

The interactive controls for BMP to ICO load after this article so crawlers still read the instructions. Path /bmp-to-ico is the canonical address. Work happens on this device; Tool-You does not take a copy of the file or pasted text for BMP to ICO.

How to use BMP to ICO

Stay on this BMP to ICO page (/bmp-to-ico). Do not switch to PNG to ICO unless you actually want Make a favicon ICO from a PNG..
Add the file type BMP to ICO accepts. Hint from the path: bmp to ico. Encode a BMP still as ICO.
Set only the options that match BMP to ICO. Neighbor JPG to ICO does something else (Make a 256px ICO from a JPEG.). Tool note: Decodes BMP then writes a 32-bit ICO. Unlike PNG to ICO this starts from BMP. Unlike JPG to ICO this is an uncompressed raster. Max 20 MB.
Run BMP to ICO in this tab. Browser memory still applies: 32-bit ICO. Max 20 MB.
Download or copy the result from BMP to ICO. If it is the wrong job, open PNG to ICO instead.

When not to use BMP to ICO

Skip BMP to ICO when a neighbor tool matches better — start with PNG to ICO or JPG to ICO — or when the description already warns the job will fail. In the tool’s own words: Decodes BMP then writes a 32-bit ICO. Unlike PNG to ICO this starts from BMP. Unlike JPG to ICO this is an uncompressed raster. Max 20 MB.

Questions about BMP to ICO

What does BMP to ICO do that other Images pages on this site do not?: Decodes BMP then writes a 32-bit ICO. Unlike PNG to ICO this starts from BMP. Unlike JPG to ICO this is an uncompressed raster. Max 20 MB. Short version: Encode a BMP still as ICO.
Does BMP to ICO upload my file or text to Tool-You servers?: No. BMP to ICO runs in this browser tab. Files stay on the device. Limit note: 32-bit ICO. Max 20 MB.
Should I use PNG to ICO instead of BMP to ICO?: Use BMP to ICO when you need Encode a BMP still as ICO. Use PNG to ICO when you need Make a favicon ICO from a PNG. They share a category (Images) but not the same job.
What are the limits of BMP to ICO?: 32-bit ICO. Max 20 MB. Also: Decodes BMP then writes a 32-bit ICO. Unlike PNG to ICO this starts from BMP. Unlike JPG to ICO this is an uncompressed raster. Max 20 MB.