Deploy Unreal Engine Project

Go to Edit - Project Setting

Set the ‘Default Maps’ to display when the game starts.

Set the ‘Build Configuration’ to ‘Shipping’. If this is your first time Packaging, make sure to check ‘Full Rebuild’.

Go to ‘Platforms’ -> Select what platform you want -> check ‘Shipping’.

And click ‘Package Project’

To itch.io

Zip the files.

Select HTML or HTML5 for kind of project.

Upload the file you zipped and check ‘This file will be played in the browser.

You can resize the resolution at ‘Embed options’.