-1
votes
1answer
753 views

How Facebook chooses substitute link thumbnail if og:image is invalid?

I am curious how Facebook selects a substitute image, when the one specified in <meta property="og:image" /> is considered invalid according to the linter. It is said that if og:image is missing ...
2
votes
3answers
513 views

Site snapshot service with archiving for outgoing links

There are a few services which offer thumbnails for outgoing links. I'm looking for a service which will archive a copy of a website snapshot. Sometimes I'll find old blog posts full of outgoing ...