Easy HRDI is a free Blender add-on that will help you to load and test your HDRI images quickly. This version is compatible with Blender 2.81 and above.
A video by Blender Daily Explaining how to use the add-on.
Preview all the HDR images in a folder of your choice.
You have the ability to change the folder.
Cycle through the images.
Create your list of favorite folders.
World nodes setup .
Recursive file search.
Automatic projection (Mirror ball/Equirectangular)
Automatic cleanup for images (deleting unused images).
Change the background without affecting the lighting.
Basic color adjustments (Gamma, Saturation, Tint).
It's ok if you want to extract the zip file.
Open the user preferences, in the Add-ons tab press the “Install” button, then locate “EasyHDRI.py” or the ".zip" file then hit enter or double click.
The add-on has now been installed you can find it in the “3D View” category, to enable it check the box to the left of the add-on.
In the 3d view Properties a new tab will appear named “Easy HDRI”.
You will get the zip file of the add-on.