Setup Create a database activity. Define some fields with different field types. Go to the export page. HTML Validation View and copy the page source. Paste the page source in the text input field in the Nu HTML validator Check the HTML. Confirm that you don't see the following errors: Element div not allowed as child of element span in this context. The acronym element is obsolete. Use the abbr element instead. Duplicate ID id_notice. Element div not allowed as child of element label in this context. Note: You might see " An img element must have an alt attribute, except under certain conditions. " related to the user profile pic, but this is an unrelated issue. Accessibility checkers Run axe on the page Confirm that you don't see any of the following errors: IDs used in ARIA and labels must be unique Form elements must have labels Note: You might see an error about multiple labels for the checkbox elements, but this is a separate issue and will be fixed in MDL-70288 .