Manual Resizing You don't have to use HTML to resize a picture in your Tumblr post. Small handles appear around an image in the editing box when you click it.

How to Resize Images and Maintain Original Sharpness. By reducing the size of your digital images without changing their sharpness, you will save up computer space and not compromise important ...

Whether you need to scale an image up or down, or change the aspect ratio, our guide covers how to resize images for Windows, macOS, and ChromeOS.