I know of one where you can import FEN, will that do? I won't mention the name of a competing website, but were you to google free chess database, you might find a site that would seem to be open every day of the year. 
Opening explorer with PGN input??
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Hello! I'm looking for an opening explorer where you can input a PGN of your own game and follow it in the opening explorer. I have been using the one at chesstempo but after a certain number of moves you have to have a paid membership to continue. Does anyone know of a good opening explorer with PGN input?? I thank you 1000 times