Tumblr Header Size, Tumblr profile picture size, headers, resize image for Tumblr cover photo size, banner size, cover size, post content image sizes, pic and dimensions and share image online. Use our Tumblr image resizer, profile photo resizer tool to generate exact standard file sizes in pixels required to share on this platform. From the tool given below, select Tumblr menu and choose the option you require to resize the image to exact dimensions. You can also click on Manual Resize option to resize the picture in the assigned size. User cropper to crop the photo.