How to create a template with to Vertical photos next to each other

[TheMangoMarket]

Hello I am extremely new to photoshop and the basics are really killing me.  If you can help me with my situation I would greatly appreciate it.

I am creating a new blog post on my website and its going to have a lot of photos in it.   I am using square space which does allow you to specifically customize the layout of the photos.  It posts all the photos one by one in order.  But I want to have Vertical images side by side.  The only way I can think to accomplishing this would be to place two Vertical photos side by side in Photoshop with a white background behind them.   I know there has to be a template out there but I simply cannot find one.  It must be easy.   I need a template so I can have a consistent size with photos and not imperfections due to eyeballing it.   Thank you for any help.

[Silkrooster]

Try using the contact sheet feature. You can specify the size of the image and how much spacing between the images.

Just place all your images into a folder then tell contact sheet where the folder is and it will populate the sheet.

All that is left is to save the sheet as a jpg or png so a browser can view it.