Looking for an image viewer that will allow me to view color shots in BW

[Auslese]

I do not need an editor, just a quick viewer so that I can pick color shots that I want to convert to BW easily. I would like to be able to view my thousand or so shots for the day in as little time as viewing them in color. Does anyone do this, apparently my camera can but this option if possible uses too much card space and creates too much data to save as well. Thanks if u kno.

 

[astroNikon]

LightRoom
import convertor
or set one setting and sync the rest.

It also has a great photo management system

 

[dennybeall]

If you have Windows 10 you can use the program named "Photo Gallery" that comes with it to do a one click convert to B&W.
Just load copies into a folder and bring the folder up in Photo Gallery.

 

[AlanKlein]

Irfanview. It's free. Load the add-ins also.

 

[weepete]

I don't know of any program that will do what you want it to do in the way that you want to do it with the file types that you wish to use.

Perhaps you should write one.