I need a filter for the "Full HTML" input format that allows me to strip specific tags. I want to allow all HTML tags, except the ones specified in the input format options.
I am using Drupal 7.
You can get that functionality out of the box with the HTML Purifier module.
Once you've installed the module, go to the admin/config/content/formats
page, choose the text format you want to edit, and select the "HTMLPurifier" checkbox. In the settings below, quite a bit further down the page, you'll find the ForbiddenElements
textarea:
That's where you need to put your disallowed tags. It's probably worth looking at the rest of the settings to make sure they match up with your expectations (there are a lot of them though, HTMLPurifier is pretty configurable).