How To Enable SVG Support In WordPress

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Web administrators and designers frequently work with various media file formats. Among them, Scalable Vector Graphics or SVG is an image format that works differently from JPG and PNG. Instead of being made from tiny pixels, SVG images are created with lines, shapes, and text written in XML code. This makes them flexible because they can be resized without losing quality.

With fast loading times, high quality, and easy customization, SVG files are a great website choice. According to W3Techs, 60% of all websites use SVG as of March 2025. Their ability to improve design and performance makes them a preferred format for web developers and designers worldwide. However, not all browsers and platforms support SVG by default; these files need manual configuration to enable their use.

This guide explains how to enable SVG support in WordPress. We also discuss the security concerns surrounding SVG and why it remains a valuable format for web design. Before we discuss these steps, let’s find out how SVG works and why WordPress doesn’t support it by default.

KEY TAKEAWAYS

• SVG files are lightweight, scalable, and ideal for logos, icons, and web graphics.
• You can enable SVG uploads using a plugin for an easy and secure setup.
• If you prefer a manual method, adding a code snippet to your theme’s functions.php file allows SVG uploads.
• Always sanitize SVG files before uploading to remove any harmful code and protect your website.
• Limit SVG upload permissions to trusted users to reduce security risks.
• Keep your WordPress core, themes, and plugins updated to ensure better security and compatibility for SVG files.

Understanding WordPress SVG File

SVG, or Scalable Vector Graphics, is a specific image format based on Extensible Markup Language (XML). Unlike regular images, which store data in pixels, SVG uses code to create shapes, lines, and text. This makes SVG images lightweight, scalable, and easy to edit.

Since SVG files are written in text format, they can be searched and indexed by search engines. This is different from PNG or JPG images, which are merely a set of colored pixels. Because search engines can read the text inside an SVG file, they can improve SEO and make the website more discoverable.

Another advantage of SVG is that it can be edited just like code. Designers and developers can open an SVG file in a text editor and change its color, shape, or size without using image editing software. This makes SVG a flexible option for creating website logos, icons, and other graphics that must be adjusted frequently.

How SVG Differs from Other Image Formats

Most common image formats online, like JPG and PNG, are raster images (meaning compiled with pixels). However, when you zoom in or enlarge an image, it may appear blurry. This is because the pixels are stretched beyond their original size.

SVGs, on the other hand, are vector images, meaning they are made using mathematical equations instead of pixels. Therefore, they can be resized to any dimension while staying sharp and clear. This makes them perfect for logos, icons, and graphics that need to scale without losing clarity.

Here’s how SVG compares to JPG, PNG, and GIF:

• JPG: Good for photos, but loses quality when compressed.
• PNG: Supports transparency but can have large file sizes.
• GIF: Supports animation but has a limited number of colors.
• SVG: Lightweight, scalable, and maintains high quality at any size.

Advantages of Using SVG

One of the benefits of SVG is its scalability. Whether you display an SVG on a small mobile screen or a large billboard, it is clear. It’s an excellent choice for logos, icons, and web graphics. SVGs are also lightweight because they store data as code rather than storing thousands of pixels. This makes websites load faster, improving user experience and SEO rankings.

Another advantage is that SVG supports interactivity and animations. Since it is based on XML, developers can modify SVG images using CSS and JavaScript to create animated graphics or interactive elements on a website. Overall, SVG is a powerful image format that offers high quality, flexibility, and faster loading times, making it an excellent choice for modern web design.

With all these advantages – scalability, fast performance, SEO benefits, and easy editing – SVGs are an excellent choice for adding high-quality graphics to WordPress websites. By using SVG files correctly and ensuring they are secure, website owners can improve design and functionality while keeping their sites fast and visually appealing.

Browser Compatibility

According to caniuse, SVG is widely supported by all modern web browsers. Whether you use Google Chrome, Mozilla Firefox, Microsoft Edge, Safari, or Opera, you can view and use SVG images without issues. Even older versions of Internet Explorer (IE 9 and above) partially support SVG, making it a reliable choice for web design.

Because of this universal browser support, SVG files can be used safely across different devices and platforms. Whether a visitor tries to access a website from a desktop, tablet, or mobile phone, SVG images will load quickly and display perfectly. This makes them a perfect choice for responsive web design and improving overall site performance.

SVG Support in WordPress

WordPress does not allow SVG files to be uploaded by default. This is because SVG files are not just images – they are XML code, which makes them different from regular image formats. While this code-based structure allows SVGs to be scalable and lightweight, it also creates potential security risks (we’ll explain later in this guide).

If you try to upload SVG to the WordPress media library without enabling support, you’ll see an error message like this:

Sorry, you are not allowed to upload this file type.

This restriction is meant to protect your website from possible attacks, but it can also be frustrating if you need to use SVG images.

WordPress SVG & Security Implications

Unlike traditional image formats, SVG files are essentially XML documents so they can be manipulated like code. This makes them vulnerable to various cyber threats, including: 

• Cross-Site Scripting (XSS) attacks: Hackers can inject harmful scripts into an SVG file, which may execute malicious actions when opened in a browser. 
• XML External Entity (XXE) attacks: Attackers can exploit XML vulnerabilities to access sensitive data, manipulate server behavior, or cause Denial-of-Service (DoS) attacks. 

Due to these potential threats, WordPress does not support SVG uploads by default. However, you can take steps there to secure SVG files before using them on your website. 

To safely use SVG files in WordPress, you should take the following precautions: 

Sanitize SVG Files Before Uploading 

SVG files can contain unnecessary or harmful code, so sanitizing them before uploading is crucial. Sanitization removes malicious scripts and errors, making the file safer for use. 

There are two common ways to sanitize an SVG file: 

1. Use an SVG plugin in WordPress: Some plugins automatically clean SVG files before uploading them to the media library.
2. Use the SVG Sanitizer Test by Darryll Doyle: This online tool scans and removes any suspicious code from SVG files. Double sanitizing with this tool ensures extra security. 

However, managing SVG security in WordPress is easier with the help of specialized SVG security plugins. These plugins ensure that SVG files are sanitized before being uploaded, reducing the risk of security threats such as malicious scripts or unauthorized code execution. Popular WordPress SVG security plugins include Safe SVG and SVG Support.

Safe SVG automatically cleans and sanitizes SVG files before they are added to the WordPress media library, making it a user-friendly option for beginners. On the other hand, SVG Support offers additional security features and custom sanitization settings, giving users more control over handling their SVG files.

So, install and properly configure an SVG security plugin to ensure your WordPress site remains protected from potential security vulnerabilities while allowing you to enable SVG support in WordPress and use them safely.

Restrict SVG Uploads to Trusted Users 

Another important security measure is to limit who can upload SVG files. Since SVG files can contain executable code, only trusted users should be allowed to upload them. To maintain security: 

• Restrict SVG upload permissions to admin-level or specific user roles. This ensures only individuals who understand the potential security risks can upload and manage SVG files.
• Educate users about the risks of downloading and using SVG files from unknown sources. Doing so can prevent them from unintentionally introducing harmful files to the site.

Ensuring only knowledgeable and trusted users handle SVG uploads reduces the chances of accidental security breaches, keeping your WordPress site safer from potential threats.

Now, you know what SVG is, how it works, why one should use it, and why it’s not enabled in WordPress by default. Let’s explore two secure ways to upload SVG files to WordPress while keeping your site safe.

How to Upload SVG to WordPress

In this section we show you two ways to enable SVG support in WordPress:

1. Using SVG Support Plugin
2. Editing the functions.php File.

Let’s start with the first and easiest approach.

Use SVG Support Plugin

Uploading SVG files to WordPress is easy when you use a plugin. Since WordPress does not allow SVG uploads by default for security reasons, a plugin helps enable SVG support while keeping your website safe. One of the best options is the SVG Support plugin, which allows you to upload and sanitize SVG files directly through the media library.

To get started, go through the following steps:

In the WordPress dashboard, go to Plugins → Add New Plugin and find SVG Support. Click Install Now. Once the installation is complete, click Activate. It’ll enable the plugin on your site.

After activating your plugin, configure its settings to ensure trusted users can upload SVG files. To do this, go to Settings → SVG Support in your WordPress dashboard.

Navigate to Settings and locate Restrict SVG Uploads To. Here, search and select the user roles permitted to upload SVG files. Enable this setting so only administrators or specific user roles can upload SVG files. This helps prevent non-authorized users from adding potentially harmful SVG files to your website.

Next, scroll down a little and ensure you enable Enable Advanced Mode? which allows extra features such as inline SVG rendering. Inline SVG means the image is added directly into the page’s HTML instead of loading as a separate file. This facilitates applying CSS styles and animations to your SVG images, giving you more control over their appearance.

Once settings are configured, click Save Changes.

Now, you can upload SVG files just like any other image by going to Media → Add New Media File, select your SVG file, and upload it. The SVG Support plugin will automatically sanitize the file, removing potential security risks. This ensures your SVG images are safe to use on your website.

Edit the functions.php File (Manual Approach)

If you choose not to use a plugin, you can manually enable SVG support in WordPress by editing the functions.php file. This method gives you more control but requires caution since modifying core files can affect your website’s functionality.

Before making any changes, back up your website to guarantee that, if something goes wrong, you can restore your website to its previous state. If you don’t want to lose customizations after a theme update, use a child theme.

Once you’re reading, access your WordPress theme’s functions.php file. You can do this by going to WordPress Dashboard → Appearance → Theme File Editor and selecting functions.php from the right-hand file list.

Alternatively, you can use an FTP client to access the functions.php file. If you’re comfortable using the FTP client FileZilla, refer to the following guides to connect, manage, and upload files:

1. How To Configure A Site In FileZilla
2. How To Upload Files Using FileZilla
3. How To Manage Files In FileZilla

For this section example, we use Hosted’s File Manager. If you’re using a different hosting provider, open your File Manager and join us for the following steps:

Login to the Hosted® cPanel and go to Files → File Manager.

Navigate to the following directory:

public_html/wp-content/themes/your-active-theme-folder-name

Locate the functions.php file, right-click on it and choose Edit.

Next, add the following code snippet at the bottom of the functions.php file:

function allow_svg_upload($file_types) {
    $file_types['svg'] = 'image/svg+xml';
    return $file_types;
}
add_filter('upload_mimes', 'allow_svg_upload');

This code adds the ‘svg’ => ‘image/svg+xml’ key-value pair to the $file_types array. This means it overwrites any existing key-value pair for ‘svg’ if it already exists. It is a simple and more direct way to enable SVG support in WordPress.

However, if you don’t want to overwrite the existing key-value pair, use the following code snippet:

function allow_svg_upload($file_types){
    $new_file_types = array();
    $new_file_types['svg'] = 'image/svg+xml';
    $file_types = array_merge($file_types, $new_file_types );
    return $file_types;
}
add_filter('upload_mimes', 'allow_svg_upload');

This code creates a new array ($new_file_types) to store the new file type (SVG). Then, it merges this new array with the existing $file_types array using array_merge(). This ensures the original list of allowed file types is preserved and SVG is added.

After adding your desired code snippet, click Save Changes.

Now, it’s time to verify that SVG support is enabled. Go to your Media → Add New Media File in WordPress and try uploading an SVG file. If the upload is successful without error messages, you have applied the changes correctly.

While this method works, it does not include automatic sanitization of SVG files. Since SVGs can contain malicious code, it’s best to upload only trusted SVG files or manually sanitize them using online tools like SVG Sanitizer to ensure your website stays secure while using SVG images.

By carefully following these steps, you can enable SVG support in WordPress and upload them without needing a plugin. However, always keep a backup before making any code changes to avoid potential issues.

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