Making Multiple Column Marketo Forms Responsive

By default, if you embed a multiple column Marketo form into a webpage the form will adopt a fixed width that will likely expand out of whatever container you put it into.

You can restyle things, to a certain degree, with the custom CSS that Marketo allows you to edit, but this only gets you so far because of the built in html structure of the Marketo forms.

Because of this, I wrote a script that does a lot of the dirty work to make Marketo forms responsive regardless of viewport size.

The Script

The script will resize any Marketo form on the page upon rendering and on window resize. It does some math to calculate how many form fields there are per row and will apply an appropriate width to those rows for any viewport size.

One note is that you also have to include a simple media query for the mobile size. Don’t have time to get into that messiness in this post though.

After Running the Script




This is just one of the many things you can achieve with the Forms 2.0 api. I have a much more complete and fleshed out script that allows you to:

  • Determine if you want the form styled
  • Specifcy button alignment and text
  • Strip out and entirely restyle the form
  • Adapt the form for a dark or light background
  • Alter radio and checkboxes styling

Comment below or contact me if you are interested in taking a look.