Web app makes it extremely easy to resize any image either by choosing exactly its new dimensions in pixels, by a percentage or by selecting a pre-set aspect ratio format for one of the popular social media platforms, or for your website, blog or newsletter.
Key features:
100% free.
My comment: It doesn't get easier than this. If you need to resize an image in a simple, fast and reliable fashion, this is the best tool that I know of. Period. Recommended.
Try it out now: https://slide.ly/promo/image-resizer/