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Step-by-Step Guide to Using Custom HTML Blocks in WordPress Posts and Pages

Jame Miller

WordPress is an incredibly versatile content management system, beloved by users for its simplicity and vast customization options. One of the most powerful features it offers is the ability to use custom HTML blocks within posts and pages. This option allows users to go beyond the standard block editor and add unique layouts, styles, scripts, and other elements that may not be available through default blocks or plugins.

Whether you’re a beginner creating a personal blog, or a developer building a professional website, understanding how to use custom HTML blocks gives your content an edge. This guide walks through a step-by-step process to use custom HTML blocks effectively in WordPress, complete with practical tips and frequently asked questions.

What Are Custom HTML Blocks?

Custom HTML blocks in WordPress are special blocks that allow users to insert any HTML code directly into their content. These blocks are ideal for embedding forms, creating styled sections, adding media embeds not supported by default, or integrating with third-party services.

Why Use Custom HTML in WordPress?

Using custom HTML provides several benefits:

Step-by-Step Guide to Using Custom HTML Blocks

Step 1: Access the WordPress Editor

To begin, log in to your WordPress dashboard and navigate to your post or page editor. You can either create a new post/page or edit an existing one.

Steps:

  1. Go to Posts or Pages in the left-hand menu.
  2. Click Add New or select a post/page to edit.

Step 2: Add a Custom HTML Block

Once you’re in the editor (Gutenberg, if you’re using WordPress 5.0 or later), you can add a Custom HTML block.

Follow these steps:

  1. Click the + icon to add a block.
  2. Type “HTML” into the search bar.
  3. Select Custom HTML from the list.

This will create a new block where you can freely paste or type any HTML code.

Step 3: Insert Your HTML Code

Use this block to input your custom HTML. For example, if you’re embedding a subscription form:

<form action="https://example.com/subscribe" method="post">
  <input type="email" name="email" placeholder="Enter your email">
  <button type="submit">Subscribe</button>
</form>

Once inserted, you can click Preview to see how your code will render within the post or page.

Step 4: Preview and Publish

Always preview your custom HTML to ensure it displays correctly.

  1. In the top-right corner of the editor, click Preview.
  2. Select the screen type (Desktop, Tablet, or Mobile) to test how the HTML appears on different devices.
  3. If everything looks good, click Publish or Update.

Use Cases for Custom HTML Blocks

Tips for Using HTML Safely and Effectively

Working with raw HTML requires a bit of attention to detail. Here are a few tips to avoid common errors:

What You Can and Can’t Do in Custom HTML Blocks

While these blocks are powerful, they are still subject to WordPress’s internal filtering for security. Understanding what is allowed can save time and confusion.

Allowed:

Restricted:

Advanced Tip: Combining Custom HTML with CSS

To really amplify the impact of custom HTML, it can be beneficial to add custom CSS. This can be done within the block using <style> tags (with limitations), or better yet, via the Customizer or a child theme’s stylesheet.

<style>
.custom-box {
  background-color: #f9f9f9;
  padding: 15px;
  border-radius: 5px;
}
</style>

<div class="custom-box">
  This is a styled box using custom HTML and CSS.
</div>

Alternatively, apply CSS via the Customizer:

  1. Go to Appearance > Customize.
  2. Click Additional CSS.
  3. Paste your styling rules and publish.

Frequently Asked Questions (FAQs)

With a little knowledge and care, custom HTML blocks can be a game-changer in designing and enhancing your WordPress content. Whether you’re adding a simple contact form or integrating a third-party application, this built-in feature offers unmatched flexibility in a user-friendly environment.

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