Comment on Infuriated Fishing by NasikaSakura

I have no idea. I'be never used that website~ Probably considering it would have to understand your save. Input "%AppData%/StardewValley/Saves" into your file explorer's location bar and you'll see your save folders containing two files. You'll need to save the whole folder. 
steamcommunity.com/app/413150/…

Yes, 1.3, otherwise known as the multi-player mod (along with other additions) will be released this Spring. so, rather soonish.