Meta tags toolkit: preview and edit website sharing tags

I came across this tool today while working on meta tags for a new site. These are a pain because the image must exist on the web before you can test it -- and it can't be loaded from your code because meta tag values are extracted from index.html before any JS code runs.

This amazing tool lets you preview your meta tag content on various socials by uploading an image from your computer. Then, when you download your code, you're reminded to put your real image in a CDN and change the code in the two places where the URL appears.

Et voilà, meta tag previews.