jsx file and put it in your Photoshop -> Presets -> Scripts folder. How to use: First of all you need to buy the tinyPNG Plugin or use your own export logic (say Standard Photoshop Web Export), then save the code as a. On the left side you can see the original one and on the right the resized and compressed one: With the script it's possible to transform a portrait mode or landscape mode image to a square (works by resizing the pic and extending the canvas) with the dimensions of your choosing (in this case 2000x2000), so every image looks equal in a shop system.

I actually went with something different: The script now opens a folder, gets all the jpeg, png and tif images in there, resizes them to squares with a white canvas (nice for woocommerce and other ecommerce systems), compresses them with the tinyPNG plugin and subsequently overwrites the existing files, this way folders don't have to be created on the fly and the pictures stay in the same folder, you just need to copy all your original images and let them be overriden.

Photoshop plugin tinypng