Saving puzzle progress?

Is there a platform with interactive online puzzles where I can save my progress and return to the assembly at any convenient time?

 

I remember feeling disappointed when my unfinished puzzles disappeared after closing a browser tab. Since then, I’ve prioritized continuity and progress-saving features. It gives me peace of mind to know I can return anytime without starting over. When I found a system that quietly preserves my activity, like the structure I associate with jigsaw puzzles online it strengthened my sense of comfort and trust.