Convert ICO to BMP on Mac.

Local file processing, by renaming the file in Finder. No converter window and no upload queue.

Finder rename

report.icoreport.bmp

How the rename works

  1. 1

    Start with report.ico

    Put the ICO file in a folder RenameTo watches, such as Desktop or Downloads.

  2. 2

    Rename it to report.bmp

    In Finder, change .ico to .bmp, then press Return. The rename is the command.

  3. 3

    Find the BMP beside it

    RenameTo produces the requested output and keeps a restorable backup of the original.

What happens under the hood

RenameTo reads the ICO with the appropriate local macOS media or document framework, then writes a new BMP beside it. The file itself is not sent to a conversion server.

About the formats

ICO is the Windows icon container. BMP is a legacy Windows bitmap format.

Questions, answered

Does my file get uploaded anywhere?

No. File processing happens on your Mac. RenameTo does use the network for license validation, trial activation, and update checks, but your source files are not part of those requests.

What happens to the original ICO file?

RenameTo keeps a backup before processing. Undo restores the original alongside a format-changing output and does not delete that output. If the original name is already occupied, the restored copy gets “(restored)” in its name.

Can I convert a whole folder?

Yes. Rename multiple selected files in Finder and RenameTo queues each supported conversion, with a separate result and backup for every file.

Can I run the same conversion from a script?

Yes. The CLI command is: renameto bmp *.ico

Related conversions

Convert ICO to AVIF

report.ico → report.avif

Convert ICO to GIF

report.ico → report.gif

Convert ICO to HEIC

report.ico → report.heic

Convert ICO to ICNS

report.ico → report.icns

Convert Sony ARW to BMP

report.arw → report.bmp

Convert AVIF to BMP

report.avif → report.bmp

Convert Canon CR2 to BMP

report.cr2 → report.bmp

Convert Canon CR3 to BMP

report.cr3 → report.bmp

Looking for another format? Browse every conversion.