What Is the Strip Custom CSS Option?
The Strip Custom CSS option removes custom Cascading Style Sheets (CSS) that are applied to a Marketo form.
When enabled, Knak removes custom styles that were added in Marketo. This allows the styles configured in Knak to control the appearance of the form.
Use this option when you want your form to match the design of your landing page.
Enable Strip Custom CSS
To enable Strip Custom CSS for a Marketo form:
Open your landing page.
Drag a Form content block onto the page.
Import a form from Marketo.
In the form settings, select Custom under Form Styling.
Enable the Strip Custom CSS checkbox.
When to Use Strip Custom CSS
Use Strip Custom CSS when your Marketo form contains custom styling that conflicts with the styles applied in Knak.
Enabling this option can help you:
Maintain a consistent design across your landing page
Ensure Knak form styles display as expected
Prevent styling conflicts between Marketo and Knak
Create a more seamless visitor experience
Common Use Cases
Enable Strip Custom CSS when:
You are using an existing Marketo form with custom CSS
A Marketo form does not match your Knak design
Marketo styling is overriding Knak styling
You want Knak styles to take precedence
Potential Considerations
In some cases, Strip Custom CSS may affect styles added by other scripts on the page.
Examples include:
Cookie consent tools
Preference centers
Third-party integrations that inject CSS dynamically
Troubleshooting Script Conflicts
If another script stops displaying correctly after enabling Strip Custom CSS, move the script to the Tracking Header section so it loads before the Marketo form.
To move a script to the Tracking Header:
Open your landing page.
Click the Info tab.
Scroll to the Tracking section.
Paste your script into the Header field.
Save your changes.
Test the page again.
If the issue continues after moving your script:
Create a new version of the form in Marketo.
Remove the custom CSS from the Marketo form.
Disable the Strip Custom CSS option in Knak.
Test the page again.
Best Practices
Before publishing your landing page:
Enable Strip Custom CSS in a test environment first
Review the appearance of the form
Test all interactive elements
Verify third-party scripts continue to work correctly
Confirm the page displays properly across devices
Need more help? Contact support via live chat using the chat bubble in the bottom right corner or email support@knak.com.