Can I instal a theme in locallhost to experiment ?
If you are talking about testing before buying, then no. This is not allowed on ThemeForest. All templates are premium so any of them does not provide trial or lite version.
No, I already bought it
I want to experiment it before I install it definitely in my site.
Have you purchased an WordPress item? If the theme has an activation feature you can activate it and then, after migrating on your live site you can deactivate the license and re-activate it on your site.
But, as I know only few themes requires activation by license key.
You can install the themes on your computer (localhost) to gain some experience with them
Thanks for your help
Thank you for your help