FastStone Image Viewer, Screen Capture, Photo Resizer ... This is a wonderful, freeware program that allows an artist to do MANY things with photos. You can resize, rename, and many more things in batches. If you have 200 photos that all are of the same group, renaming and resizing is a cinch! It's really easy to use, but complex enough to play around with too. It's light on resources, and free to download and use for home (not business). I may sound like a commercial with this program, but I only recommend it because nearly everyone who deals with photos on this site uses it. I was referred to it, and love it as well. Enjoy if you want it! Also, feel free to discuss this tool and similar ones here
If you resize conservatively, no. I've not noticed anything notable when I've used it, but I'd suggest just playing around with it. Normally, the things I use it for aren't things that would result in a drastic resolution change.
ohh very nice. imma check this out later wen i do another gif. i have like 100-150 photos.. image having to resize each of them one at a time. -_-
Here's another, I've used this for years. Image Resizer for Windows - Home Integrates within windows. Select all the files you want, then you can resize them all at once. You can keep the originals or replace them. Simple!
I've found that this website is quite helpful. TinyPNG – Compress PNG images while preserving transparency