If you want to create table for website, these free online Table Generator tools. They will help you create HTML, Markdown, etc, tables.

When you want to turn that giant spreadsheet into an HTML table without wrangling too many TD's and TR's by hand, you can use a formula to generate the HTML tags for you.

How to Embed an Excel Spreadsheet on an HTML Page. If you've ever tried to paste a single screenshot of an Excel spreadsheet into an HTML page, you know how difficult that can be.