What tool do you use for resizing multiple pictures at the same time?

I'm a professional photographer reasonably expert with photo editing software particularly Photoshop. I'm not aware of any such software that can resize multiple images at the same time. That is to say that there may be one but I'm just not aware of it. However, that being said. There's nothing hard about opening up an image individually resizing it then going onto the next

Many computers already have a built-in simple photo editor app that allows you to resize any of it but none simultaneously in multiple. And are you aware that when if your goal is to print images you can resize your hearts content each image at the final stage of printing process.

You have to "group" all the photos together to make it one image. Then reduce this new image.

Well, you can do that on Photoshop, just follow the instructions of this link:

How to batch resize in Photoshop

How about that?!

I've never had the need to do that in my 20 years of making images. However, clearly, it can be done and Timur has shown you how using Photoshop. I have an older version of PS and either I don't have the option or never paid attention 'cause I never thought about it.

There are plenty of command-line image processors that can operate on multiple images; one that I have used is ImageMagick. It is completely free. Of course, if you select multiple images, such programs do them one after the other, rather than all at once, but I expect that is what you meant, (one operation).

http://www.imagemagick.org/script/index.php

interesting

thanks for the link!

I didn't know anything about it either. But I tried it and I have to say it's quite efficient. You can resize or watermark dozens of pics in a single session. I had to optimize some images for online usage and it really helped.

Photoshop

I am using Photoshop for that. Through actions, I do resize of multiple pictures at the same time and save at the same place.