My favorite desktop 3D browsers:
- https://demo.f4map.com/ - OSM data updated near instantly
- https://osmbuildings.org/ - OSM data updated about once a month
Some other notable renderers with old and outdated OSM data:
- https://streets.gl/ - static map data from 2023, but very nice!
- https://ion.cesium.com/stories/viewer/?id=2f0131ab-3948-4467-947c-411d5705a116 old data not updated.
- https://www.arcgis.com/home/webscene/viewer.html - old OSM data mixed with other even lower quality sources
If you want to see what you are doing while editing there is a new and working JOSM plugin UrbanEye3D: https://github.com/Zkir/UrbanEye3D
Kedzi3D was the previous plugin but it wasn't updated for recent Java versions, UrbanEye works like a charm!