How to Apply CSS on Specific Page/Post

Do you know you can apply CSS on a specific page or a post in WordPress? Yes, due to the CSS-friendly nature of WordPress, this is possible. And in this guide, we will show you the various ways you can add CSS to a specific page or a post.

All WordPress themes typically apply different styles to different types of content. Posts, pages, taxonomies, profiles, and other content types use different stylesheets. The same applies to plugins and other aspects of WordPress.

However, due to the flexibility of WordPress, you can also use different stylesheets for a specific page and post types. But let’s look at why you might need to add CSS to them before we go through the process.

Why Apply CSS to Specific Page or Post

Adding CSS to specific pages and posts is very useful if you are building or designing a website. CSS is generally used to customize a website’s visual appearance. Using CSS on your website can help you present your pages exactly as you want them to appear to visitors.

A particular page or post type might need a unique design compared to other pages or posts on your website. In this case, one of your best options is to apply CSS to the specific page or the post. These pages or posts are usually added to your website’s menus. However, they can also include other unique pages and posts like the shop page, product page, or even the home page.

For example, even we at QuadLayers have used CSS on specific pages, such as Portfolio and About, to differentiate them from other pages or post types. Now, without further ado, let’s move on with the process.

How to Apply CSS on Specific Page or Post

You can apply CSS on a specific page or a post in various ways. But, here are the three most common ones:

1. Using the HTML id or class
2. Adding a PHP function
3. Including the CSS file on a specific page or post

All these approaches can be used to apply CSS for multiple purposes. In this article, we will walk through these approaches with a step-by-step tutorial.

1. Using the HTML id or class

This is one of the most common and widely accepted approaches for applying CSS to a specific page or post. All we need to do is retrieve a unique identifier for a page or post. Then, this HTML class or id allows us to target all our CSS scripts to the desired page or post.

1.1. Find the HTML Class or ID of the Page

First, you must identify the ID or class to use in the CSS stylesheet. The browser inspect tool makes this easy.

Open the page where you want to apply CSS, right-click on the element you want to edit, and then click on Inspect.

Here, check the body HTML tag. This will vary depending on the theme that you are using.

We have used the Twenty Twenty theme in all of the following examples. So, this is what you will see when you inspect the home page of a website using the Twenty Twenty theme:

In the screenshot above, the home page’s unique identifier is the “home” class. Therefore, if you want to apply some CSS rules only to the home page, use this class in your selectors.

For example, we want to apply style to the logo only on the home page. In addition to the home class, we also need a logo image selector. Again, this can be obtained from the browser inspector tool.

In this case, we’ll use the “custom logo” class to apply our style to the logo. Now, let’s combine them with the class from the previous step. Finally, we can apply our script only on the home page using the following CSS selector:

.home .custom-logo{ /*your CSS here */}

Note: You don’t need to follow all the in-between HTML tags and include them in your selector. You can skip them all, even if the element you want to style is far from the unique page selector.

Of course, you can use the full CSS path selector if you need a more specific selector. But this is quite overwhelming and unnecessary in most cases.

As an example, this is a much specific selector for styling the same logo element we’ve seen before:

html body.home div#page.site header#masthead div.site-branding div.site-logo span.custom-logo-link img.custom-logo{ /*your CSS here */}

1.2. Find the HTML Class or ID of the Post

As with the pages, each post should also have a unique HTML class. Again, inspect the element on the post you want to style using the browser developer tools. Then, you can see the unique identifier as with the postid attribute.

For the following post with the Twenty Twenty theme, the class identifier is postid-557.

Similarly, you can do the same with any other website page. Using the unique class that identifies a page. In the following screenshot, you can see that the class that identifies the page is page-id-357.

Finally, create your own CSS selector that suits the needs of your website, just like the custom logo example.

Then, you can apply the CSS on the specific page or post by adding it in Appearance > Customize > Additional CSS. If you need more help with it, you can look at our guide on how to apply CSS to WordPress or apply CSS using the browser developer tool.

2. Adding a PHP Function

The previous method is adequate for applying our custom CSS to specific posts or pages. It will be sufficient for most customization you might require. But in some cases, there can be limitations:

• Your theme has no unique HTML class or ID for the content you need to style.
• You have an extensive list of CSS rules and need to save them in separate files.
• You want to apply a condition other than the current page.

If you encounter similar issues when applying CSS to a specific page or post, using a PHP function is better.

But before we start, ensure you backup your WordPress website or create a child theme for this approach. We will be editing some delicate files on your website. Any unnecessary changes could cause further issues with your website.

If you need help, you can even create a child theme using one of the best child theme plugins for WordPress.

2.1. Find the Page/Post ID

The first step is to check the ID of the page or post where we want to apply our styles. You might notice that the ID values match those from the previous step. However, this is not the same HTML ID that we used before.

The ID we are referring to now is a PHP variable that identifies posts and pages, whereas the ID in the previous approach identifies an HTML class.

Thankfully, it’s very easy to find the page and post IDs on your website. You can see the IDs of pages and posts on the backend admin dashboard when you open the editor. The post or page ID is also mentioned in your browser’s URL.

Another way to get the ID of a page or post is to use the following script in the functions.php child theme file. Just go to Appearance > Theme Editor and open the functions.php file.

Then, paste the following snippet in the editor and update the file. It will print the page ID on the front end.

add_action('wp_head',function(){
    $page_id = get_queried_object_id();
    echo $page_id;
});

After you know the PHP identifier for the post or page you need to apply CSS to, you can print the CSS in the head. You can use the same hook we’ve used before, i.e., wp_head().

Just paste the following snippet in the functions.php file once again.

add_action('wp_head','my_head_css');
function my_head_css(){
    $page_id = get_queried_object_id();
    if($page_id==97){
        echo "<style>    /* your CSS here */    </style>";
    }
}

Add your CSS to the “your CSS here” section and update the file.

3. Including CSS file on Specific Page or Post

The previous methods are acceptable for adding small CSS snippets to customize a specific post or page as needed. But for larger CSS files, you must follow best practices and upload a separate CSS file where all your custom CSS should be collected.

3.1. Create a CSS File Using Code Editor

First, you must create a separate CSS file in a code editor and include all necessary CSS rules. Editors like Visual Studio Code, Sublime Text, or any other that supports CSS files can be used.

Then create a new file with the CSS extension and paste your code into it. For this tutorial, we have named the file my-style.css.

3.2. Upload the CSS File to Child Theme Folder

The CSS file you created must be uploaded to the child theme directory. You can use an FTP client like FileZilla to upload the file. You can even upload it to the active child theme’s directory.

3.2. Enqueue your Custom CSS File

You can enqueue your custom CSS file to your WordPress website by adding a code snippet to your functions.php file.

In the following script, we will use the wp_enqueue_script() hook, the correct way to apply CSS files to a WordPress website. Inside the function, we register and enqueue our CSS file (my-styles.css) only if the condition is met. This is the same usage as the previous example.

Then, the get_queried_object_id() function will retrieve the ID of the current page or post. All you have to do is add the following script to the functions.php file again and update it.

add_action( 'wp_enqueue_scripts', 'my_theme_styles' );

function my_theme_styles() {
    if(get_queried_object_id()==97){
        wp_register_style( 'my-styles', get_stylesheet_directory_uri() . '/my-styles.css');
        wp_enqueue_style( 'my-styles', get_stylesheet_directory_uri() . '/my-styles.css');
    }
}

Note: In the sample script above, we use the same ID reference as in previous examples: 97.

If you want further information about adding a CSS file, please see our detailed guide on applying CSS to WordPress.

Common Mistakes to Avoid While Dealing with This

When applying CSS to specific pages or posts, it’s essential to steer clear of these common pitfalls to ensure your styles work correctly and don’t cause issues on your site:

• Not targeting the correct page/post selector: Using incorrect or generic CSS selectors can cause your styles to apply site-wide instead of the intended page or post.
• Overusing inline CSS: Adding excessive inline CSS directly in the content can make your code harder to maintain and may degrade site performance.
• Ignoring CSS specificity: Failing to use sufficiently specific selectors can cause your custom styles to be overridden by theme or plugin CSS.
• Forgetting to clear the cache: If you use caching plugins or browser cache, your CSS changes might not appear immediately until you clear the cache.
• Do not test on different devices: Custom CSS can behave differently across devices and screen sizes. Always check responsiveness after applying styles.
• Adding too much CSS to a single page: Large CSS blocks can slow page load times. Keep styles lean and focused.

Troubleshooting Page Specific CSS Issues

• CSS changes not showing on the page: Clear your browser cache, plugin cache, and server cache, then refresh the page to ensure you are viewing the latest version of your styles.
• Incorrect selector used: Inspect the page using browser developer tools to confirm the page ID, post ID, or body class is correct and matches your CSS selector.
• Styles being overridden by the theme or plugins: Increase selector specificity carefully or place your CSS after the conflicting styles to ensure it takes priority.
• CSS added in the wrong location: Verify that your CSS is added in the Customizer, child theme, or a frontend-loading plugin, not in the admin area.
• Minification or optimization conflicts: Temporarily disable CSS minification or CSS combining to check whether they are preventing your page-specific styles from loading properly.
• Responsive styles not applying: Make sure media queries are correctly written and tested across different screen sizes to confirm the CSS applies as intended.

Bonus: Best WordPress Plugins for CSS Modifications

Here are some of the best plugins you can use for this task:

• CSS Hero
• Yellow Pencil Visual CSS Style Editor
• Simple Custom CSS and JS
• SiteOrigin CSS

Below, we will outline what each plugin offers.

1. CSS Hero

CSS Hero is a premium visual design plugin that allows you to customize the look and feel of your WordPress website without writing a single line of code.

What makes CSS Hero truly unique is its real-time, point-and-click editing interface. You can visually select any element on your site—such as buttons, headers, or widgets—and instantly apply custom styles, including colors, padding, margins, typography, and more. Every change is previewed live, so you see precisely how your edits will appear before publishing.

One of CSS Hero’s standout features is its compatibility with the most popular WordPress themes and plugins, ensuring smooth integration across a wide range of setups. It also includes responsive editing tools that let you adjust styles for mobile, tablet, and desktop.

2. Yellow Pencil Visual CSS Style Editor

Yellow Pencil Visual CSS Style Editor is a powerful front-end design tool that lets you customize the appearance of any WordPress theme or plugin in real time. It offers a visual interface where you can click on any element on your site and adjust its design—no coding required.

From fonts and colors to spacing, borders, and animations, Yellow Pencil gives you complete control over your site’s styling. Its drag-and-drop functionality and support for over 60 CSS properties make it highly versatile for beginners and advanced users alike. Yellow Pencil’s extensive customization toolkit and live preview system set it apart.

You can apply styles instantly and see how they affect your site, ensuring pixel-perfect adjustments.

It also includes advanced features like responsive editing, CSS animation support, and element inspection. Whether you’re fine-tuning a single post or overhauling an entire site design, Yellow Pencil makes the process smooth and visual, making it one of the best plugins for hands-on WordPress customization.

3. Simple Custom CSS and JS

Simple Custom CSS and JS is a straightforward, efficient plugin that lets you add custom CSS and JavaScript to your WordPress site without touching theme files. Its simplicity makes it ideal for users who want a no-fuss way to apply code snippets to their entire site or target specific pages and posts.

The plugin supports adding CSS and JS site-wide or on individual posts, pages, or custom post types, giving you flexible control over where your code runs.

This plugin stands out for its clean interface and ease of use, which let you manage all your custom styles and scripts within the WordPress dashboard. It also includes features like code syntax highlighting and error checking, ensuring your custom code works correctly.

This blend of simplicity, functionality, and reliability makes Simple Custom CSS and JS a top choice for WordPress users looking to enhance their site’s customization quickly.

4. SiteOrigin CSS

SiteOrigin CSS is a powerful visual CSS editor that allows you to customize your WordPress site’s appearance easily. Its intuitive, user-friendly interface is unique, letting you see live previews of your CSS changes as you make them, eliminating the need to write code blindly.

It supports point-and-click editing, making it accessible for beginners and experienced users who want precise control over their site’s design.

This plugin stands out by enabling you to target specific pages, posts, or elements, allowing you to apply custom styles exactly where you need them without affecting the entire site. Additionally, it offers advanced tools like a browser inspector and supports all standard CSS properties.

These features, combined, make SiteOrigin CSS one of the best options for anyone looking to manage custom CSS efficiently in WordPress.

Frequently Asked Questions

Now, let’s see some frequently asked questions regarding this topic.

Conclusion

These are the various methods for applying CSS to a specific page or post. It can help you create unique designs for particular pages and posts for your website. To summarize, there are three most common ways to add CSS to specific pages and posts:

• Using the HTML id or class
• Adding a PHP function
• Including the CSS file on a specific page or post

The most straightforward approach is to use the HTML ID or class for the CSS selectors. However, if your theme has any limitations, your next best option is to add a PHP function to apply CSS. Finally, if you need to apply large CSS stylesheets to a specific page or post, including them in a CSS file is the most suitable approach.

If you want to use more CSS on your website, we also have tutorials to customize the Divi menu with CSS or edit the WooCommerce shop programmatically. Similarly, you can also customize your pages and posts even more with the help of our guides to create posts and pages programmatically, turn a post into a page, create custom post type, or even add posts to a page in WordPress.

So, can you apply CSS to specific pages or posts now? Was this tutorial helpful? Please let us know in the comments. In the meantime, here are some more articles that you might want to visit:

• How to convert/change post type in WordPress
• Create WordPress custom post type programmatically
• How to Customize WooCommerce Cart Page