If you're on the free plan there is a Wufoo branded footer at the bottom of your form. The footer is automatically removed when you upgrade to a paid plan.
To get the embed code for your site:
If you choose:
For payment-enabled forms, a new window will open when someone proceeds to the merchant to make their payment.
When you embed your form, the background, header, and border styling from your theme is removed for a more seamless experience with your website. To apply those elements to an embedded form, add them directly to the container you've embedded the form in using HTML or CSS.
The embed code automatically adjusts the width and height of the form depending on the browser window size, font size, or if the form changes height due to validation errors. If you want to set a fixed height, you can edit the embed code to add a scrollbar to the form.
The trick here is changing the value of the autoResize parameter to false and changing the height parameter to your desired height.
To embed your form using an iFrame, copy and paste the iFrame code directly into the HTML of your web page.
We estimate the height of your form in the iframe, so it may not display perfectly on all browsers or at all resolutions and font sizes. Sometimes, this means the submit button won't display or that your form has too much white space.
To fix this, you can adjust the value of the height attribute in the embed code. Make sure to leave enough wiggle room for instructions or error messages that might display when someone fills out your form, since this embed code doesn't automatically adjust the form's height when different elements appear.
It's possible to embed your form on both Wordpress.com and Wordpress.org.