I follow the National Library of Australia on Twitter and this was one of their tweets.
I enjoyed doing jigsaw puzzles when our children were young and I am happy to do jigsaws with out grandchildren. I thought this was a great resource for during social distancing. You can do jigsaws on your phone, although that would be a bit too small, on your ipad, a better size, or on your desktop computer, the ideal size.
I thought I would give it a go to see how easy it would be to navigate.
I started by clicking on https://jigex.com/1jCV
This is the result.
There are various aids on the top screenbar and the central bar. The image on the left of the central bar lets you choose the number of pieces you want the puzzle to have.
The next symbol lets you rotate the puzzle pieces and the third symbol lets you change the background colour.
On the top bar on the left is the menu where you can open your own image to make a puzzle. Obviously you need the image on your computer.
The symbol on the top bar in the centre lets you display only the edge pieces.
The picture symbol lets you have the picture of the puzzle on the screen at the same time if you want it.
There is also a timer for when you are doing the puzzle.
I love how you can make the puzzle pieces as big or as small as you like. Ideal for different aged family members.
The favourite part of the whole thing is being able to upload photos as puzzles.
A fantastic resource for the family.
There are also various apps for jigsaws.
Gippsland Granny 
Thanks for sharing. I have a jigsaw app since years and it is still my favourite. Enjoy and keeps safe.
Thanks Barbora.
I love this! Thank you for all of your helpful explanations; I feel empowered to try this out!
Thank you for your comment. I sometimes find it difficult to know how much explanation to give but I figure there is always someone out there that needs a detailed explanation. I know it helps me when I am doing something new.