Batch processing images for website

[Nish53]

Hello Guys! The problem I am having is I guess a very common one that almost everyone is encountering while trying to do this. I have around 700+ images of laptops on both transparent and white background which I want to upload into my website as products. These pictures are very diversified. Some as small as 400x600 and some 1200x800. What I am looking for is if I can resize all of these pictures info a perfect 700x700 whith all the products having uniform distance from the edges of the canvas. I tried creating different actions but too my avail, they failed. I set the action as follows

Unlock Background -> Select Subject -> Delete Layer 0 -> Covert Layer 1 into Smart Object -> Trim Transparent Pixels-> Resize Image into 15% -> Crop the Canvas into a 1:1 ratio -> Enlarge layer 1 by 50% (For some reasons the action is noting the dimensions in pixels rather than percentage here) -> Resize image into 700x700px -> New Layer -> Fill White -> Move the layer below.

This action has been giving out distorted images back, some has the product very small and some very big. How can I do a better job here? Any help will be really appreciated.

[c.pfaffenbichler]

Have you tried 

File > Automate > Fit Image

? 

[Stephen_A_Marsh]

I agree with c_pfaffenbichler that an action that uses Fit Image is what you are looking for, with a few other steps similar to this screenshot:

This action presumes that all files will start flattened. If you have a mix of flat and layered originals, a conditional action would be best to avoid errors, as two similar but different actions would then be required.

[JJMack]

No only 1:1 Aspect image will resize perfectly into  your 1:1  700px by 700px image area.