OptinMonster Documentation

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Add Extra Fields to Your Campaign Form

Add Extra Fields to Your Campaign Form

OptinMonster makes it easy to create a fully customized campaign form to capture lead details from your site visitors.

In this article, you’ll learn how to add extra fields to your OptinMonster campaign form.

We provide several options for adding extra fields to your OptinMonster campaign, depending on the Email Service Provider you use. These options are outlined below.

Field Mapping

Field Mapping is a brand -new feature available for our most popular Email Service Provider integrations. You can easily add radio buttons, phone fields, text, areas, number fields, lists, and more!

Get started using Field Mapping.

Embed Form Block

Our Embed Form block allows you to add any form embed code directly to your OptinMonster campaign. This includes forms from platforms we don’t have direct integration with.

When using the Embed Form block, you will:

  1. Create the form using your Email Service Provider’s form builder.
  2. Add an Embed Form block to your OptinMonster campaign where you want the custom form to visually appear.
  3. Paste the form’s embed code into the Form Embed block.
    *Custom HubSpot forms must be edited following this guide to function correctly.
    *Custom Marketo forms must be edited following this guide to function correctly.
  4. Update the form’s embed code to track conversions, following this guide.
  5. Optional: Add custom CSS to control the styling of your form. Custom embedded forms do not automatically inherit the campaign’s template styling.

Get started adding a custom form using the Form Embed block.

Javascript-based forms are supported, however, a Javascript error in your form code may break your OptinMonster campaign. If that happens please be sure to reach out to support for assistance.

iFrame forms are supported, however, it is not possible to capture conversions, set cookies on submission (to control how long a campaign is hidden), or customize the appearance of the form with custom CSS. Whenever possible, we recommend using an alternative form embed option (HTML or Javascript) if one is provided.

WordPress Shortcodes

You can show a form in your OptinMonster campaign that you’ve created using a WordPress plugin.

Get started adding a WordPress shortcode to your OptinMonster campaign.

WordPress WPForms Block

You can easily create a WPForms custom form and embed it in OptinMonster using our WPForms block.

Get started adding WPForms to your OptinMonster campaign.


If you’re serious about jumpstarting your website business growth, then get started with OptinMonster today!

Get Started With OptinMonster Today!

BONUS: Done-For-You Campaign Setup ($297 value)

Our conversion experts will design 1 free campaign for you to get maximum results – absolutely FREE!

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OptinMonster has transformed our business. Before integrating their optins, our clients saw a 2% conversion rate from web traffic, which is slightly above the standard for their industry. With the integration of OptinMonster’s lightbox popup, exit-intent technology, split testing, and other tools, our client’s conversion rates soared by an unprecedented 500%. They attracted substantially more customers while spending less on digital advertising. Their success propelled them to the top of their markets, outperforming national chains and other medical spas with much bigger marketing budgets. Our client’s success in their market has distinguished us in our own. We are now one of the most sought-after marketing firms in the industry of aesthetic medicine. We know that the integration of OptinMonster, more than any other tool or marketing strategy, has supported this growth and achievement.

chris zelig medstar media

Chris Zelig

Partner, Medstar Media

OptinMonster has been a game-changer for us. From driving donations to collecting new leads, there is nothing that this simple tool has failed to accomplish. Our lead collection rate has jumped by over 1,000%.

joe lowe american bird conservancy

Joe Lowe

Director of Digital Communications, American Bird Conservancy

Through OptinMonster’s exit-intent popups, we have more than doubled our sales conversion rate. Best of all is the compound effect of using OptinMonster over a long period of time—more conversions mean more customers, which means more word of mouth.

mitch smith, managing director, shockbyte

Mitch Smith

Managing Director, Shockbyte.com