Museum tickets for Florence

Always the official website. Never a third party booking site.

Last year I purchased all of our tickets from each museum's website.

Is there a general website for purchasing museum tickets in Florence?

No, you'll need to use several.

is it best to visit each museum's website?

Tickets for most of the biggies are sold through the official B-ticket website, the Uffizi is sold through the Coopculture, the Duomo complex through their own website, and Palazzo Vecchio though the website for Florentine civic museums.

https://www.b-ticket.com/b-ticket/firenzemusei/default_eng.aspx.html
https://www.uffizi.it/en/tickets
https://tickets.duomo.firenze.it/en/store#/en/buy?skugroup_id=3006
https://ticketsmuseums.comune.fi.it/1_museo-di-palazzo-vecchio/

Please avoid some other ticketing websites, specifically those by "Feel The City", that are cleverly designed to look 'official' but charge much more for tickets than those purchased through the links above.

There is a 3-day pass which covers entry to a big chunk of Florentine museums but which still requires advance reservations to the most-visited of them. If this is of interest, be sure to read through the FAQs carefully to understand how to use it. It doesn't cover the Duomo complex.

https://www.firenzecard.it/en/homepage-eng
https://www.firenzecard.it/en/faqs

(Edited)