Tables Generator is probably the first tool you should check out since it comes with a couple of useful options those might help you create a better table for your website. It allows you to create ...

You can use the Elementary item on the Data Analysis menu to generate frequency tables. Frequency tables show the distribution of column values and can include frequencies, cumulative frequencies, ...

Some sites no doubt generate their TOCs by hand, or assemble them server-side somewhere in the CMS, but building a table of contents doesn't need to be complex or low level.