When you want to send or upload an ID proof photo to a site then sometimes it becomes difficult to upload it if the size of the photo is bigger. Modern mobile cameras are now taking images in very high resolution and that is the reason of their high file size. Modern smartphones generally give pictures having 6 million pixels or even more which makes the file size of the order of 20-30 MB which is definitely not advisable for uploading. In most of the devices there are inbuilt photo editors which can be used to resize the photos and decrease the file size. It is easy to resize a photo having 6 million pixels to 1 million pixels. The file size would drastically reduce from 30 MB to the order of 5-6 MB only.
There are many editing softwares available some of which like Photoshop are for professional work while many others available in play store for android / iOS can be used in mobile for quick resizing work. Once we decrease the size of the photo and save it then its file size is reduced. It would take less space in memory and would also be easily uploaded. One thing which is to be noted is that the resolution of the photo at that size remains same as the original one at the original size. This point is interesting to understand the logic behind reducing size in order to decrease the file size. Once the editing is saved then you cannot increase the size to original as the pixels are already lost in reducing process. The difference of the pixels between the original and reduced one can be easily made by keeping them side by side and stretching them with mouse or cursor to same frame.
Some of the android as well as some of the desktop applications for resizing images to decrease the file size are Codenia Image Size, Lit Photo Compress & Resize, Resize Me, Xllusion Photo Resizer, Z Mobile Photo Resizer, PhotoMarks, Fotosizer, Movavi Photo Editor, Icecream Image Resizer, Light Image Resizer, FILEminimizer Pictures, RIOT, FastStone Photo Resizer, Photo & Picture Resizer etc.
Knowledge is power.