[hermanradtke]

An alternative to https://explain.dalibo.com/ is https://tatiyants.com/pev

Both have pros and cons about how they visualize things.

[tclancy]

Came here to suggest the same. If you hit the gears on the left and choose view: compact and graph: cost you can get a decent overview of the hot spots in complicated queries quickly.

[MrOxiMoron]

PEV is great, helped me figure out and fix specific query issues that only happened on production