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Tool for creating "greyed out" versions of icons?

I've got a couple hundred little icons in different image formats that I need to grayscale versions of.

I'm hoping there's a freeware tool out there that'll do it as a batch.

Saturday, February 18, 2006
If they're in an image format, you can create an action in Photoshop. If they're in .ico format, sorry, wouldn't know.
Berislav Lopac Send private email
Saturday, February 18, 2006
On Unix, you can use the netpbm library for that kind of stuff.

Imagemagick might also be scriptable.
Matthias Winkelmann Send private email
Saturday, February 18, 2006
Paint .NET (a free product) has several 'effects' filters. I remember a while back coming across one which had the desired effect you are looking for.
Andrey Butov Send private email
Sunday, February 19, 2006

Great image manipulation library that comes with a command line wrapper.
Sunday, February 19, 2006
Just increase the lightness around 40%. You may also need to reduce the saturation.
Sunday, February 19, 2006  has great batch-conversion features. It's also a great all-round image viewer that gobbles just about anything you throw at it.

Monday, February 20, 2006
The procedure Microsoft recommended for producing grey-out icons (for unavailable or disabled controls) was to convert the image to monochrome and draw it in the button highlight color, then overlay it at a small offset (often 1 pixel up and 1 pixel to left) with the same image drawn in the button shadow color.

This is described in the "Unavalable Appearance" section of their "Official Guidlines for User Interface Developers found at

Another approach is to use your existing icon or bitmaps and render them using the DrawState() API call. If you include DSS_DISABLED in the flags option, Windows will generate a disabled image for you.
Stephen C. Steel Send private email
Monday, February 20, 2006
Thanks for all the tips.  Irfanview turned out to be great for my purposes.
Tuesday, February 21, 2006

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