Tools to preview how an image/post will show on various social media platforms?

[LoudLemur]

There are several social media platforms, e.g. X, gab, invidious, peertube, etc. Each of these have their own preferred dimensions and size for a social media post to display nicely. (If you don't have the right portrait/landscape mode, or your image is the wrong size, it will be cropped.)

Does anybody know some good tools that help you see what an image or post will look like after it is posted? Perhaps these tools can generate several versions of the same image so it displays nicely on social media.

[BrutalBirdie]

Do you mean something like this? https://socialsharepreview.com/

[LoudLemur]

@BrutalBirdie Yes, something just like that. If there is any Open Source equivalent, that would be good to know.