Others found the Mail app on iPad can also resize photos just like using an iPhone. Update: Some iPad users found iPad will just send the photos as they are, without resizing them. Using Mail app to resize your photos however are totally free, no extra app or installation required.
There are a variety of apps can do this however many of them are paid apps. But it works without any third party image editors or apps.
It is kind of weird to scale photos using the Mail app on iOS devices. Once the photo sent to your own email address, open this email on iPhone and download the resized photo on to your iPhone. Without reducing the photo size, turning the bigger photos into smaller ones, it takes more bandwidth and data when you are connected to the internet using your cellular package. iPhone has this function to shrink photos attached in emails due to the large size of actual HD photos taken using your iSight camera.
IPHONE REDUCE PICTURE FILE SIZE FULL SIZE
Choose Mail from the screen, you will then open up the Mail app on iPhone with the selected photo attached, type in your own email address to send the photo to yourself, right after you tap on the Send button, you will see a screen like this: “ Small” is 320×240 – may be too small “ Medium” is 640×480″ – seems to be small enough “ Large” is 1632×1224 – half the full size of source image “ Actual” is 3264×2448 – full size without compression or resize Now you have the chance to resize the photo on iPhone or iPad through the Mail app. Tap to run the Photos app on your iPhone or iPad, then select the photo you like to scale or resize, tap on the share icon, then tap on Next, you will bring up the photo sharing options.