Maybe you already knew this, but every form created by Formstack passes XHTML and CSS validation. If you’re a web designer struggling to create forms that comply with web standards, you can use Formstack to easily create a form and download the XHTML for use on your own site. Use the W3C’s markup validator and CSS validator to test your forms.
Forms created by Formstack also meet Section 508 and WAI standards for accessibility. You can make sure that invalid code doesn’t prevent people with disabilities from using your forms. Use Cynthia Says to test your forms.