Merge many pics together in a row

I want to know if its possible to merge pictures side by side and in a row, like so





Obviously not from a video file, but from standard images, I'm trying to achieve the same results to post on a board and have it so, the picture will then have to be click on to be seen in its entirely.


Hope this goes in the right section, sorry for any mistake.







PS... For some reason on this site, your image resizer doesn't resize it down, it keeps the whole size?