DiagnostiCSS
Visually detect any potentially invalid or inaccessible HTML markup*
DiagnostiCSS highlights the following problems within markup:
- inline styles and event attributes
- invalid links
- empty or deprecated elements
- elements missing required attributes
Use it in your project
Good news everyone! DiagnostiCSS proudly supports Rails and any other Rack-compatible framework.
Use it everywhere
Just drag the DiagnostiCSS link to your bookmarks toolbar to apply it on any page.
Chrome Extension
Yep. This is it. Just install it.