Tools for photo editing
First scale the picture and cut it if necessary to get the size needed.
Then reduce the KBs. Here you can use one software tool
You can scale images, reduce their weight and cut them.
The size could be 800px width (it displays a medium image) or 1000 pixels width (it displays a large image) with a better quality wide, it depends on the quality of the photo. In this case the pictures should be between 40kB and maximum 100KB weight.
These are some tools:
- Use picmonkey for resize http://www.picmonkey.com/ (see video Tutorial https://www.youtube.com/watch?v=VTMFK30VxrQ )
2. To reduce weight (reduce the KBs.)
The tools mentioned in point one can help you, but if the photo’s quality is low using some of these, yo should resize first and after reduce weight KBs with https://compressor.io/
Video example here: