How to make custom native interstitial ads

Interstitial ads are pop-up ads that take up the viewer's screen for a few seconds before giving way to the content on a page or app. It can be as large as the entire viewable area of a page or app. You can use native templates to create interstitial ad items that are tailored to your needs.

A sample interstitial ad

In this guide, we're going to create a simple interstitial ad using a custom native ad template. This type of native template has all the code - HTML, JavaScript, and style element - necessary to display the ad properly.

If you'd rather sanitize the template and have only HTML inside it, you should make your interstitial ad using a styled native ad template instead. For more information on the differences between custom native ads and styled native ads, read About native ad templates.

Templates for custom native ad items are not compatible with styled native ad items, and vice-versa.

You will learn:

  1. How to create a template for a custom interstitial ad. You can customize the sample code to fit your needs.
  2. How to create a custom interstitial ad item once you have a custom interstitial template.

How to create a custom interstitial ad template

This template will require the user to provide the URL to where the image creative is hosted when creating the interstitial ad item.

  1. Click Native Ad Templates in the left navigation menu to go to the Templates section.
  2. Click Add Native Ad Template in the Native Ad Templates table. The New Native Template window will appear.
  3. Click Custom Rendering/API. The New Native Ad Template page will appear.

Selecting a native template type

  1. Name the template then add an image URL variable for the image that will be in the ad. In our sample code we called this variable ImageURL.
  2. Enter the code in the HTML Template (Custom Rendering) field, then click Save Changes.

Creating a custom native interstitial ad template

Here's the code we used in our example:

<!DOCTYPE html>
<html lang="en">
        .interstitial-container {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            z-index: 1;
            background-color: rgba(0, 0, 0, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
        .interstitial-image-container {
            position: relative;

        .interstitial-image-container a img {
            width: auto;
            height: auto;
            max-width: 100%;
            max-height: 100%;

        .interstitial-close-button-container {
            position: absolute;
            top: 15px;
            right: 15px;
            cursor: pointer;

        .interstitial-close-button {
            width: 26px;
            text-align: center;
            display: inline-block;
            color: #ffffff;
            font-size: 22px;
            background: #000000;
            border-radius: 26px;
            user-select: none;
    <div class="interstitial-container">
        <div class="modal-content">
            <div class="interstitial-image-container">
                <a target="_blank" href="[TRACKING_LINK]">
                    <img id="image" src="[%ImageURL%]" onload="adjustContainerSize()">
                <div class="interstitial-close-button-container">
                    <span class="interstitial-close-button" onclick="closeButton()">×</span>
        function adjustContainerSize() {
            const image = document.getElementById('image');
            const container = document.querySelector('.interstitial-container');

            if (image.complete) {
       = `${image.width}px`;

        function closeButton() {

You can now use this template to create a custom interstitial ad item.

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How to create a custom interstitial ad item

  1. Go to the section of the relevant zone (Your AdButler > Publishers > Your Publisher > Your Zone) or campaign (Your AdButler > Advertisers > Your Advertiser > Your Campaign).
Custom native interstitial ad items can be assigned only to Standard zones with their size set to Dynamic. The zone size can be configured only when creating a zone and cannot be changed afterward.
  1. Click Add Ad Item in the Ad Items table. The Add Ad Item window will appear.
  2. Click Native (Custom Rendering/API). The New Ad Item page will appear.

Creating a native (custom rendering/API) ad item

  1. Set the ad item's size to Dynamic.
  2. Select your interstitial custom native ad template in the Template dropdown menu.
  3. Fill in the rest of the fields as needed, including the image URL. If you entered a destination URL, you can test it by clicking Open Destination URL to the right of the field.
  4. Click Save Ad Item.

Creating an interstitial custom native ad item in AdButler

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