Active Resolution is a Blender add-on for setting rendering resolutions on a per-camera basis. Rather than tying a single output size to the whole scene, it lets you assign a unique resolution to each individual camera, so one project can produce multiple resolution renders.
Resolutions adjust automatically based on the active camera, keeping the render output matched to whichever camera is selected. Settings are managed from a dedicated panel under Output Properties > Active Resolution, so the controls sit alongside Blender's existing output settings.
The add-on is at version 0.0.1, its initial release, with the developer stating a commitment to further updates based on user feedback. It supports Blender 4.1, 4.0 and 3.6, and is released under the GPL license. For animation and multi-camera projects where different shots call for different output sizes, it removes the need to change the resolution manually each time the active camera switches.