How to Use WebP Images in WordPress (3 Methods)

How to Use WebP Images in WordPress for Maximum Performance (2024 Guide)

Are your WordPress site‘s images slowing down your page load times? Images are often the largest assets on a page, so optimizing them can have a huge impact on performance. That‘s where the WebP image format comes in.

In this comprehensive guide, we‘ll cover everything you need to know about using WebP images in WordPress, from the basics of what WebP is and why you should use it, to advanced techniques for generating and serving WebP images for optimal performance. Whether you‘re a beginner or an advanced user, by the end of this guide you‘ll be equipped to take full advantage of WebP and speed up your WordPress site.

What Is WebP?
WebP is a modern image format developed by Google to provide superior compression for images on the web. It supports both lossless and lossy compression, as well as transparency and animation.

The key benefits of WebP over formats like JPEG and PNG are:

• Significantly smaller file sizes (25-34% smaller than comparable JPEG images, 26% smaller than comparable PNGs)
• Faster page load times due to less data being transferred
• Visually lossless quality, indistinguishable from the original images

With websites increasingly prioritizing performance and page speed being a ranking factor for search engines, adopting more efficient image formats like WebP is becoming a web performance best practice. Smaller image sizes mean faster load times, lower bounce rates, and better user experience.

As of 2024, global WebP support is around 95%, with all modern browsers like Chrome, Firefox, Edge, and Safari having added WebP support. This widespread compatibility means there‘s little downside to adopting WebP. You can serve WebP images to supported browsers while gracefully degrading to standard formats like JPEG or PNG for older browsers.

WordPress and WebP Support
As the most popular CMS powering over 40% of websites, WordPress has taken notice of the performance benefits of WebP. As of WordPress 5.8, released in July 2021, WordPress core includes native support for WebP.

This means you can upload WebP images directly to the WordPress Media Library just like you would JPEGs or PNGs. WordPress will read the image metadata and dimensions and display the images normally in your content. No special handling is required.

However, WordPress won‘t automatically convert your existing JPEG/PNG images to WebP. For that, you‘ll need to use a plugin or implement custom code. More on that later.

Adopting WebP in WordPress
The process for transitioning to using WebP images in WordPress depends on whether you‘re starting a new site from scratch or optimizing an existing one.

For a brand new WordPress site, you can simply upload your images in WebP format from the beginning and WordPress will handle them normally. Be sure to use a modern, compatible theme that properly displays WebP images.

For an existing site, you‘ll likely want to convert your current image library to WebP to realize the performance benefits. You have a few options for this:

1. Regenerate WebP versions using an image optimization plugin
   By far the simplest approach is to use a WordPress plugin to bulk generate WebP copies of your existing JPEG/PNG images. We‘ll cover a few of the best options in the next section.

These plugins will scan your Media Library, generate optimized WebP versions of each image, and intelligently serve the WebP version to compatible browsers while falling back to the original image for older browsers.

2. Manually convert and upload WebP images
   If you only have a small number of images, you can convert them to WebP manually using an image editor like Photoshop or an online conversion tool. Then re-upload the WebP versions to the Media Library.

This approach gives you the most control but can be tedious for larger sites. And it doesn‘t provide an automatic fallback for older browsers.

3. Generate WebP versions programmatically
   For more advanced users comfortable with code, you can write a script to programmatically generate WebP versions of your images and upload them to the server. This gives you complete flexibility but requires technical expertise to implement. You‘ll also need to handle browser detection and fallbacks yourself.

In most cases, using a plugin is the optimal approach for converting an existing WordPress site‘s images to WebP. It balances efficiency with control while providing key features like bulk conversion, automatic optimization settings, lazy loading, and browser fallbacks.

Top WebP Image Optimization Plugins for WordPress
Several high-quality WordPress plugins have emerged to handle WebP image generation and optimization. Here are a few of the best options we recommend:

1. ShortPixel Image Optimizer
   ShortPixel is a popular image optimization plugin that can compress JPEGs, PNGs, and generate next-gen formats like WebP. It offers a generous free plan for smaller sites as well as affordable paid plans.

Key features:

• Lossy, lossless, and glossy compression options
• Bulk optimize existing images (up to 50 for free)
• Automatically convert new uploads to WebP
• Lazy loading with inline placeholders for faster first contentful paint
• Serve WebP via tag for wide compatibility
• CDN support and integration with Cloudflare Polish
• Detailed optimization reports

To set up ShortPixel:

1. Install and activate the free plugin
2. Get an API key from your ShortPixel account
3. Choose your desired compression settings
4. Enable WebP versions in the Advanced settings
5. Bulk optimize your existing images

Going forward, ShortPixel will automatically optimize new uploads and generate WebP versions according to your settings.

2. Imagify
   Created by the team behind the WP Rocket caching plugin, Imagify is a powerful image optimization and WebP conversion solution.

Key features:

• Automatic WebP conversion and delivery to supported browsers
• Bulk optimization for existing images
• Aggressive, normal, and lossless compression levels
• Choose between tags or .htaccess rewrite method for WebP delivery
• Optimize and resize images externally on their servers to minimize server load
• 20MB free quota monthly, affordable paid plans

Setting up Imagify is straightforward:

1. Install the plugin and activate with your Imagify API key
2. Choose your preferred compression level
3. Enable WebP conversion in the Optimization settings
4. Select your WebP delivery method ( or .htaccess)
5. Bulk optimize your images

Imagify will then handle WebP going forward according to your settings. The plugin also integrates nicely with WP Rocket for a complete performance optimization solution.

3. EWWW Image Optimizer
   EWWW is a comprehensive image optimization plugin that supports WebP as well as alternative next-gen formats like JPEGXR and AVIF. It can optimize any images generated by WordPress including Theme files.

Stand-out features:

• Supports WebP, JPEGXR, AVIF formats
• Adaptive, intelligent image conversion based on browser support
• Low quality image placeholders for lazy loading
• Media Library list mode for bulk optimizing
• Automatic compression on upload via API or on-server tools
• Flexible WebP delivery via rewrite rules, tags, or JS WebP
• Folder scanning to optimize non-Media Library images
• Free core features and affordable upgrade plans

Setting up EWWW is slightly more involved than other plugins but very powerful:

1. Install and activate plugin
2. Choose your preferred optimization method (API or on-server)
3. Enable WebP and configure conversion options
4. Select WebP delivery method (rewrite rules, tags, JS)
5. Save and verify rewrite rules are working (if applicable)
6. Bulk optimize existing images via Media Library list mode

Once configured, EWWW provides the most flexibility and control over your WebP image optimization. Their adaptive delivery ensures maximum compatibility and performance.

Other notable plugins with WebP support include Smush, reSmush.it, and Optimole. The best choice depends on your specific needs and preferences.

Verifying WebP Delivery
After setting up WebP image optimization on your WordPress site, it‘s important to test that WebP versions are being delivered to compatible browsers as expected. A few ways to do this:

1. Browser developer tools
   In Chrome, Firefox, or Edge, right-click to inspect a page. Click the Network tab and refresh the page. Look for image resources ending in .webp.

2. Browser extension
   Install a WebP detection extension like "WebP Browser Support" for Chrome. It will display an icon indicating if WebP images are being served.

3. Online tools
   Enter your page URL into a tool like WebP Test to analyze the number of WebP images vs other formats.

If WebP images aren‘t loading as expected, double check your plugin settings and rewrite rules. Confirm there are no conflicting plugins like security or optimization tools that may be interfering. And check that your theme and page builders are compatible with WebP.

WebP and Performance Best Practices
Using WebP images is just one aspect of an optimized WordPress site. For best results, combine WebP with other performance techniques:

• Lazy load images and iframes to reduce initial page weight
• Properly size images by using responsive breakpoints
• Remove unused CSS and JavaScript files
• Minify HTML, CSS and JavaScript
• Leverage browser caching by setting far future expires headers
• Use a CDN to deliver assets quickly
• Implement a fast, lightweight theme
• Avoid bloated page builders when possible
• Minimize third-party scripts and WordPress plugins

By combining WebP images with other front-end optimization best practices, you can significantly improve your WordPress site‘s performance, load times, and Core Web Vitals scores. This leads to better SEO, lower bounce rates, and higher conversion rates.

WebP FAQs & Misconceptions

Is WebP ready for production use?
Yes. As of 2024, WebP is supported by over 95% of browsers globally. It‘s being used in production by major sites across the web. When combined with fallbacks for older browsers, WebP is absolutely production-ready today.

Are WebP images lower quality than JPEG?
No. WebP supports both lossy and lossless compression. Lossy WebP images are visually indistinguishable from JPEG images at the same file size. And lossless WebP offers better compression than PNG while maintaining pixel-perfect quality.

Can I use WebP images with a CDN?
Yes. Most major CDNs like Cloudflare, KeyCDN, and Cloudinary support WebP and can convert and serve WebP images automatically. Some WordPress WebP plugins integrate directly with popular CDNs for seamless delivery.

What about Safari support for WebP?
As of Safari 14, released in September 2020, Apple has adopted WebP support. Safari on both macOS and iOS can now display WebP images natively.

Are there any downsides to using WebP?
The main downside is lack of support in older browsers. But this can be mitigated through progressive enhancement and graceful degradation. Serve WebP to compatible browsers, fall back to JPEG/PNG for older ones.

For most sites, the benefits of reduced file sizes and improved performance greatly outweigh the drawbacks. We expect WebP to only become more widely used in the coming years.

Conclusion
WebP is a next-generation image format that offers significant performance advantages over legacy formats like JPEG and PNG. It‘s an increasingly important tool for optimizing WordPress site speed.

As of 2024, WebP is supported by the vast majority of browsers and WordPress core. Using an image optimization plugin, WordPress sites of all sizes can easily implement WebP and reap the performance benefits.

By following this guide, you should have a firm grasp of how to use WebP images effectively in WordPress. Prioritize WebP as part of your overall site optimization strategy to deliver faster pages and a better user experience.