How to edit Pixels and DPI of an iPhone photo?

I need to send out five photos I have on my iPhone 6 and I'm the receipts are very specific to only use 72 dpi resolution and to keep images under 500 pixels in height yet I have no clue how to manage this. It also asks to keep the total file under 499 mb. How do I see if my photos follow these requirement and if they aren't how can I edit them?

I need to send out five photos I have on my iPhone 6 and I'm the receipts are very specific to only use 72 dpi resolution and to keep images under 500 pixels in height yet I have no clue how to manage this. It also asks to keep the total file under 499 mb. How do I see if my photos follow these requirement and if they aren't how can I edit them? Thank you. Answer As soon as possible please. Attempting to meet specific requirements for photo image files is NOT something that lends itself to using a mobile

All you can really do is copy or send your image files to your email and once you have them on your computer, resize as necessary using Photoshop CC. There are apps; here's one: https://itunes.apple.com/...47517?mt=8" class='ext_link'>https://itunes.apple.com/...47517?mt=8. You can also re-size photos when emailing them; the "medium" size option is 640x480, which should work. DPI is a printing specification, and merely indicates that the person who wrote the requirements doesn't understand them either. Download Irfanview. It's free. You can see and control DPI and height in pixels (px) under Image-Resize/Resample. You should also see the file size in the status line at the bottom of the window. You could use GIMP - it's free http://www.gimp.org/...w.gimp.org" class='ext_link'>http://www.gimp.org/...w.gimp.org

Click Image > Scale Image > set the height to 500. Click Scale.
Click Image > Print Size > set the PPI to 72

There are apps; here's one: https://itunes.apple.com/us/app/resize-image/id409547517?mt=8. You can also re-size photos when emailing them; the "medium" size option is 640x480, which should work. DPI is a printing specification, and merely indicates that the person who wrote the requirements doesn't understand them either.

Download Irfanview. It's free. You can see and control DPI and height in pixels (px) under Image-Resize/Resample. You should also see the file size in the status line at the bottom of the window.

You could use GIMP - it's free http://www.gimp.org

Click Image > Scale Image > set the height to 500. Click Scale.
Click Image > Print Size > set the PPI to 72

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