Katsushi Kawamori

<h4>Generate WebP or AVIF</h4>
<ul>
<li>Generate WebP or AVIF file when adding image file in Media Library.</li>
<li>Generate WebP or AVIF from all the images by async/await.</li>
<li>Optionally, Can replace image files with WebP or AVIF when adding new media, and delete the original image file. Also, when generating all images, the original image file ID will be overwritten as WebP or AVIF and the original image file will be deleted. All URLs in the content are also replaced.</li>
</ul>
<h4>WP-CLI</h4>
<p>WP-CLI commands are available. If you have a large number of files, WP-CLI commands is more reliable.<br />
* <code>wp pluswebpavif</code><br />
* <code>wp pluswebpavif webp</code> -> Generated WebP.<br />
* <code>wp pluswebpavif avif</code> -> Generated AVIF.<br />
* <code>wp pluswebpavif help</code> -> Specification of this command.<br />
* <code>wp pluswebpavif webp mail</code> -> Send results via email.<br />
* <code>wp pluswebpavif webp replace</code> -> WebP or AVIF replacement of images and contents.<br />
* <code>wp pluswebpavif avif addext</code> -> Append the webp or avif extension to the original filename.<br />
* <code>wp pluswebpavif webp --pid=12152</code> -> Process only specified Media ID(Conversion source ID).<br />
* <code>wp pluswebpavif avif --quality=90</code> -> Specifies the quality of WebP or AVIF.<br />
* <code>wp pluswebpavif webp --types=image/png,image/gif</code> -> MIME type to convert.</p>
<h4>How it works</h4>
<span class="embed-youtube" style="text-align:center; display: block;"><iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/EIheJryR7j0?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe></span>
<h4>Filter hooks</h4>
<pre><code>/** ==================================================
 * Filter for advanced change database.
 * If you want to replace other databases besides content.
 */
add_filter(
    'plus_webp_advanced_change_db',
    function( $before_url, $after_url ) {
        /* Your processing */
        return array( $before_url, $after_url );
    },
    10,
    2
);
</code></pre>


Plus WebP or AVIF

It is very useful to replace the URLs of images of existing content as well.

Easy and very useful


I really like this plugin and it's very good in other aspects. However, on both of my websites, when converting in bulk, I was unable to continue the conversion for a certain period of time, indicating an Ajax 500 error. What is the reason?


500 error


This is great plugin to save my server space!



Dear developer, I prefer to donate by paypal, usdt or stripe instead of inputting my credit card elsewhere.


Great plugin

Jackson Jonah

<p><strong>Skyspeed</strong> is a robust, enterprise-grade image optimization solution designed to make your WordPress site lighter and faster without sacrificing visual quality.</p>
<p>Unlike other plugins that bloat your dashboard with upsells, Skyspeed is focused purely on performance. It automatically intercepts every image you upload, resizes it to a sane maximum width, and converts it to modern, high-compression formats like <strong>AVIF</strong> and <strong>WebP</strong>.</p>
<h3>🚀 Key Features</h3>
<ul>
<li><strong>Smart Format Selection</strong>: Automatically checks if your server supports <strong>AVIF</strong> (the newest, most efficient format). If not, it falls back to <strong>WebP</strong>, and finally to the original format if needed.</li>
<li><strong>Intelligent Resizing</strong>: Automatically resizes massive uploads (e.g., 6000px wide photos from phones) to a web-ready Max Width (default: 1920px), saving megabytes instantly.</li>
<li><strong>Safety First (Automatic Backups)</strong>: We care about your data. Every original image is safely backed up to a dedicated folder (<code>uploads/original-backups/</code>) before any optimization occurs.</li>
<li><strong>One-Click Restore</strong>: Made a mistake? Hover over any image in the Media Library and click <strong>“Restore Original”</strong> to revert instantly.</li>
<li><strong>Bulk Optimizer</strong>: Process your entire existing media library in the background with our AJAX-powered batch processor. Includes a sleek circular progress bar!</li>
<li><strong>Live Preview</strong>: Don’t guess quality settings. Use the Live Preview tool to compare “Before vs. After” quality and file size on a real image before applying settings globally.</li>
<li><strong>Analytics Dashboard</strong>: Track exactly how much disk space you’ve saved with our built-in savings calculator and dashboard widget.</li>
</ul>
<h3>⚡ Why AVIF?</h3>
<p>AVIF is the successor to WebP. It offers superior compression (often 20-30% smaller than WebP) with better visual fidelity. Skyspeed is one of the few free plugins that prioritizes AVIF support out of the box.</p>


Skyspeed – Image Optimizer, WebP & AVIF Converter

Boost your site speed automatically. Resizes huge uploads, converts images to next-gen WebP & AVIF formats, and safely backs up originals.

Plus WebP or AVIF vs Skyspeed – Image Optimizer, WebP & AVIF Converter