Often when creating a website, a client will provide you with large images that are 2-5MB and thousands of pixels wide. This video shows you a quick browser-only workflow for cropping, resizing and compressing these images so that they will load more quickly on a webpage.
Photopea image editor: https://www.photopea.com
JPEG compressor: https://compressjpeg.com
Simple image editor: https://jspaint.app