Seating Chart Generator turns a guest list into a seating chart and the print files that go with it, in your browser. Paste names from Google Sheets or Excel, or upload a CSV, choose the number of tables and seats, and press Seat guests. A household column keeps families together, and rules such as must sit together and must not sit together are applied automatically. Then drag names between tables.
The same chart prints as a seating poster, a find-your-seat list, table numbers and place cards in US Letter or A4. There is a page for classroom seating charts too. There is no account, and your guest list stays in your browser. The planner is free and downloads carry a small watermark. The Event Pass is US$14.90 once for 90 days, and Planner is US$12.90 a month.
Most seating chart tools want an account or a monthly plan for something people do once for a wedding or party. I wanted one where you paste the guest list, seat everyone in a click, and print the poster and place cards, with the list staying in your browser.