DuRPresets is an add-on for Blender which exports and imports all render settings as external presets.

It adds a Render Presets section in the Render Properties panel, with the two buttons to import and export.

DuRPresets also exports and imports the settings set with DuBlast, an add-on for quickly creating and playing playblasts.

When importing a preset, you can select which part of the preset has to be imported (general settings, cycles settings, eevee settings, output settings…)