How to check how a tag renders?

How can he see an example of how a tag renders?

1. Overpsas Turbo
2. https://github.com/gravitystorm/openstreetmap-carto (craft= is coincidentally being discussed in https://github.com/gravitystorm/openstreetmap-carto/issues/1697)

Of course, you can suggest a better tool is needed.

Below is what I feel like being not faithful about user experience on "checking how a tag renders" in your description.:

He is not Tagging for the renderer. He simply needs to check

If he is checking this deeply, he will need to know how to use the appropriate sources, tools, and resources to check. While checking the renderer for correct tagging may be quick and dirty, it is not always correct or a replacement for knowing the tags.

The way to check even before getting started would be to look at the links on https://wiki.openstreetmap.org/wiki/Tag:craft=sawmill . Surely one will lead to real live examples where he can see how this tag will render, even before he makes his first edit!

Including the wiki.

"This article is a stub. You can help OpenStreetMap by expanding it.".

The tag is also "in use" only, like many others.

He eventually gets to https://taginfo.openstreetmap.org/tags/craft=sawmill#map where he sees thousands of dots. Unfortunately they are not clickable.

Fortunately, they are not clickable. Such a small and rendered-static image will not be nice otherwise. It is a statistical diagram illustrating distribution, not an interactive "map". These are also used with as many combination of tags.

Fortunaately, there's a "Overpass Turbo" button on the top right corner.

Some ideas:

• OSM wiki pages often contain rendering example images in the infobox (example). Of course, these are added by hand, so if no image is shown, that may be either because it's not rendered or because no one has added it to the wiki yet.
• Taginfo does have a "projects" tab listing the applications/styles supporting a particular tag, and the icon each of them uses for the feature (example). This works for many projects, but unfortunately, openstreetmap-carto – the "default style" on osm.org – is not yet among them.
• You can use Overpass Turbo to look for existing uses of the tag. For tags with few uses, you can follow the "Overpass turbo" link in the top right corner of a Taginfo page. For more common tags, that link will no longer lead to a global search, so make sure you zoom to an area likely to have the kind of feature you're investigating.