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How to Fix the Sidebar Below Content Error in WordPress

Yuhda Ibrahim

Development Consultant

November 16, 2025

4 min read

Introduction

If you’ve ever logged into your WordPress site only to notice that your sidebar has slipped awkwardly below your main content, you’re not alone. This common issue—known as the sidebar below content error in WordPress—can make your layout look broken, confuse visitors, and even affect user experience. It’s a frustrating problem, especially if you rely on your sidebar for navigation, ads, or featured widgets.

The good news? It’s not as scary as it looks. In most cases, this error comes down to small issues like mismatched HTML tags, CSS float problems, or theme compatibility. With a bit of troubleshooting, you can restore your site’s design back to normal in no time.

In this article, we’ll walk through the most common causes of the sidebar below content error and show you exactly how to fix it. Whether you’re a beginner or a more seasoned WordPress user, you’ll find easy-to-follow steps that will get your site looking sharp again.

How to Fix the Sidebar Below Content Error in WordPress

What Causes the Sidebar Below Content Error in WordPress?

Before fixing the problem, it’s helpful to know why it happens in the first place. Some of the most common causes include:

  • Unclosed HTML tags in a post or widget.
  • CSS float or width issues that break the layout.
  • Theme design flaws or outdated code.
  • Plugin conflicts that interfere with page structure.
  • Custom code changes gone wrong.

Once you know the potential culprits, it’s easier to pinpoint the solution. Let’s go step by step.


Step 1: Check for Broken HTML in Your Posts or Widgets

One of the most common reasons for the sidebar slipping below content is an unclosed HTML tag. For example, missing a </div> or </p> tag can throw off the layout.

Here’s how to fix it:

  1. Edit the page or post where the error appears.
  2. Switch to the Text or Code Editor view in WordPress.
  3. Look for missing closing tags (</div>, </section>, etc.).
  4. Use a free HTML validator tool to scan your code and spot mistakes.

Once fixed, save your post and refresh your site.


Step 2: Inspect CSS Floats and Widths

Sometimes, the issue lies in your CSS rather than your content. If your content or sidebar is using floats, a small styling problem can push the sidebar down.

Here’s what you can try:

  • Add this CSS snippet to your theme’s stylesheet or Customizer > Additional CSS:
.clearfix::after {
  content: "";
  display: table;
  clear: both;
}
  • Make sure your sidebar and content widths add up correctly (usually 100%). For example, if your content is set to 75%, your sidebar should be around 25%.

This small adjustment often fixes the misalignment.


Step 3: Switch to a Default WordPress Theme

If fixing HTML or CSS doesn’t solve the issue, your theme may be the problem. Outdated or poorly coded themes sometimes cause layout conflicts.

Try this:

  1. Go to Appearance > Themes in your dashboard.
  2. Activate a default theme like Twenty Twenty-Five.
  3. Check if the sidebar displays correctly.

If the problem disappears, your theme is the culprit. Consider updating it, contacting the theme developer, or switching to a more reliable theme.


Step 4: Disable Plugins That May Conflict

Plugins can sometimes inject extra code that breaks layouts. To test this:

  1. Deactivate all your plugins.
  2. Check if the sidebar appears in the right place.
  3. Reactivate plugins one by one to see which one causes the issue.

Once identified, you can either look for an alternative plugin or contact the developer for a fix.


Step 5: Use Browser Developer Tools for Quick Debugging

If you’re still stuck, browser developer tools (like Chrome DevTools) can help you find the root cause.

Here’s how:

  • Right-click your page and select Inspect.
  • Look for misplaced or oversized elements in the Elements tab.
  • Adjust CSS live in your browser to test possible fixes before applying them in WordPress.

This method is especially handy if you’re comfortable experimenting with CSS.


Preventing Sidebar Layout Issues in the Future

Once you’ve fixed the problem, it’s smart to take steps to prevent it from happening again:

  • Always close your HTML tags when editing content.
  • Use a child theme for customizations to avoid breaking the layout.
  • Keep your theme and plugins updated.
  • Run tests after installing new plugins or making design changes.

By following these best practices, you’ll keep your WordPress layout stable and user-friendly.


Wrapping Up

The sidebar below content error in WordPress can look intimidating, but it’s usually easy to fix once you identify the root cause. Whether it’s a missing HTML tag, a CSS float issue, a faulty theme, or a plugin conflict, the solutions we covered should help you get your sidebar back in place.

Remember: small coding errors can have big visual impacts, so double-checking your HTML and CSS is always a good first step. And if all else fails, switching themes or disabling plugins can often reveal the culprit.

With these troubleshooting tips, you’ll not only fix the sidebar problem but also feel more confident handling future WordPress layout issues. Keep experimenting, keep learning, and your site will always look its best.

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