Use Black & White - free
Frequently asked questions
Can I convert back to colour afterwards?
No. Grayscale conversion discards colour data, so keep a copy of the original if you may want it in colour later.
Does this reduce the file size?
Often slightly, since a grayscale image typically compresses a little more efficiently than a full-colour one.
What formats are supported?
JPG, PNG and WEBP images can all be converted.