David Degner

<p>Built by a <a href="https://www.daviddegner.com" rel="nofollow ugc">Boston photographer</a> for site owners who care about visual quality and full control. This plugin prioritizes <strong>image quality</strong> over everything else — no subscriptions, no external services.</p>
<h3>Features</h3>
<ul>
<li><strong>Local Processing</strong> — All conversion happens on your server. No subscriptions or external API calls. Works great on a shared CPU with 2GB RAM.</li>
<li><strong>Quality First</strong> — Uses LANCZOS resizing, preserves ICC color profiles, and keeps EXIF/XMP/IPTC metadata intact.</li>
<li><strong>Fully Tunable</strong> — Control quality (0–100), speed (0–10), chroma subsampling (4:2:0, 4:2:2, 4:4:4), and bit depth (8/10/12-bit).</li>
<li><strong>Smart Fallback</strong> — Serves AVIF to supported browsers, JPEG to everyone else via picture elements.</li>
<li><strong>Automatic Conversion</strong> — Convert on upload or via daily scheduled background scans.</li>
<li><strong>LQIP Placeholders</strong> — Generate ThumbHash-based low-quality image placeholders for smooth loading.</li>
</ul>
<h3>How It Works</h3>
<p><strong>Front end:</strong> The plugin wraps your img tags in picture elements with an AVIF source. Browsers that support AVIF load the smaller, higher-quality file — others gracefully fall back to JPEG.</p>
<p><strong>Conversion:</strong> Uses ImageMagick CLI (fastest), Imagick PHP extension (high quality), or GD Library (fallback) to convert JPEGs to AVIF on upload or via background jobs.</p>
<p><strong>LQIP:</strong> Generates compact (~30 byte) ThumbHash placeholders that display instantly while images load.</p>
<h3>Server Setup</h3>
<p>The plugin supports three conversion engines, in order of preference:</p>
<h4>ImageMagick CLI (Fastest, Recommended)</h4>
<p>Uses the ImageMagick command-line binary directly:</p>
<ul>
<li><strong>System binary:</strong> ImageMagick 7.x built with HEIF/AVIF support (via libheif)</li>
<li><strong>No PHP extension required</strong></li>
<li><strong>Benefits:</strong> Fastest performance, LANCZOS resizing, full metadata preservation (EXIF, XMP, IPTC, ICC)</li>
<li><strong>Typical paths:</strong> <code>/usr/bin/magick</code>, <code>/usr/local/bin/magick</code>, or Homebrew on macOS</li>
</ul>
<p>To verify AVIF support:</p>
<pre><code>magick -list format | grep -i avif
</code></pre>
<h4>Imagick PHP Extension (High Quality)</h4>
<p>Uses the PHP Imagick extension:</p>
<ul>
<li><strong>PHP extension:</strong> imagick</li>
<li><strong>System libraries:</strong> ImageMagick built with HEIF/AVIF support (via libheif)</li>
<li><strong>Benefits:</strong> LANCZOS resizing, full metadata preservation (EXIF, XMP, IPTC, ICC), color profile handling</li>
</ul>
<p>To install on Ubuntu/Debian:</p>
<pre><code>apt install php-imagick imagemagick libheif-dev
</code></pre>
<h4>GD Library (Fallback)</h4>
<p>Uses PHP’s built-in GD library:</p>
<ul>
<li><strong>PHP extension:</strong> gd built with AVIF support (provides imageavif on PHP 8.1+)</li>
<li><strong>Note:</strong> Some distro builds omit AVIF support; limited metadata preservation</li>
</ul>
<h4>MIME Type Configuration</h4>
<p>Ensure your web server is configured to serve .avif files as image/avif.</p>
<h4>Documentation</h4>
<ul>
<li><a href="https://imagemagick.org/script/download.php" rel="nofollow ugc">ImageMagick installation</a></li>
<li><a href="https://www.php.net/imagick" rel="nofollow ugc">PHP Imagick installation</a></li>
<li><a href="https://www.php.net/manual/en/image.installation.php" rel="nofollow ugc">PHP GD installation</a></li>
<li><a href="https://imagemagick.org/script/formats.php" rel="nofollow ugc">ImageMagick format support</a></li>
</ul>
<h4>Need help with setup?</h4>
<p>If you’re not sure what to install or upgrade, copy your <strong>Server Diagnostics</strong> from the plugin status/tools screen (or run <code>wp avif status --format=json</code>) and paste it into an LLM.</p>
<p>Example prompt:</p>
<pre><code>I need AVIF support for WordPress. Based on this diagnostics output, give me step-by-step commands to install or upgrade ImageMagick, libheif, and PHP Imagick on my server.
</code></pre>
<p>After applying changes, verify with:</p>
<pre><code>wp avif status
magick -list format | grep -i avif<h3>WP-CLI Commands</h3>
</code></pre>
<p>Manage AVIF conversions from the command line.</p>
<h4>Status</h4>
<p>Show system status and AVIF support diagnostics:</p>
<pre><code>wp avif status
wp avif status --format=json
</code></pre>
<h4>Convert</h4>
<p>Convert JPEG images to AVIF format:</p>
<pre><code>wp avif convert --all
wp avif convert 123
wp avif convert --all --dry-run
</code></pre>
<p>Options:</p>
<ul>
<li><code><attachment-id></code> — Specific attachment ID to convert</li>
<li><code>--all</code> — Convert all attachments missing AVIF versions</li>
<li><code>--dry-run</code> — Show what would be converted without actually converting</li>
</ul>
<h4>Statistics</h4>
<p>Show AVIF conversion statistics:</p>
<pre><code>wp avif stats
wp avif stats --format=json
</code></pre>
<h4>Logs</h4>
<p>View or clear conversion logs:</p>
<pre><code>wp avif logs
wp avif logs --limit=50
wp avif logs --clear
</code></pre>
<p>Options:</p>
<ul>
<li><code>--clear</code> — Clear all logs</li>
<li><code>--limit=<number></code> — Number of logs to show (default: 20)</li>
</ul>
<h4>Delete</h4>
<p>Delete AVIF files for an attachment or all attachments:</p>
<pre><code>wp avif delete 123
wp avif delete --all --yes
</code></pre>
<p>Options:</p>
<ul>
<li><code><attachment-id></code> — Attachment ID to delete AVIF files for</li>
<li><code>--all</code> — Delete all AVIF files in the media library</li>
<li><code>--yes</code> — Skip confirmation prompt when using –all</li>
</ul>
<h4>LQIP Commands</h4>
<p>Manage LQIP (ThumbHash) placeholders:</p>
<pre><code>wp lqip stats
wp lqip generate --all --force
wp lqip generate 123
wp lqip delete --all --yes
</code></pre>
<p>For more information, visit <a href="https://wp-cli.org/" rel="nofollow ugc">wp-cli.org</a>.</p>
<h3>Contributing</h3>
<p>Contributions welcome! Please submit issues and pull requests on <a href="https://github.com/ddegner/avif-local-support" rel="nofollow ugc">GitHub</a>.</p>
<h3>License</h3>
<p>GPL v2 or later — <a href="https://www.gnu.org/licenses/gpl-2.0.html" rel="nofollow ugc">View License</a></p>


AVIF Local Support

High-quality AVIF image conversion for WordPress — local, quality-first.

Giovanni Bevacqua

<p><strong>GioCompress</strong> is the lightweight yet powerful WordPress plugin designed to automatically optimize and convert your images into modern, web-friendly formats. It helps your website load faster without compromising visual quality, boosting your SEO scores and user experience.</p>
<p>GioCompress offers both a <strong>Free version</strong> with essential optimization features and a <strong>PRO version</strong> for advanced control and maximum performance.</p>
<h3>🚀 Key Features (Free Version)</h3>
<p>With <strong>GioCompress (Free version)</strong>, your site gets an immediate boost in speed and better SEO:</p>
<ul>
<li><strong>Automatic Compression on Upload:</strong> Every image you upload is instantly optimized for the web.</li>
<li><strong>Automatic WebP Conversion:</strong> Your images are automatically converted to the WebP format, ensuring superior performance and exceptional visual quality.</li>
<li><strong>Optimization of Scaled Images:</strong> Even thumbnails and all various image sizes generated by WordPress are optimized.</li>
<li><strong>Delete Original File:</strong> By default, we keep only the optimized version to maximize disk space savings on your server.</li>
<li><strong>Optimize Existing Images (5/day):</strong> Already have a site full of images? Start optimizing your existing galleries right away, with a limit of 5 images per day.</li>
<li><strong>Smart Lazy Loading (SEO):</strong> Your images load only when they are visible to the user, significantly improving page speed and SEO ranking. It works on all images on your site, wherever they are inserted.</li>
<li><strong>Generate Missing Alt Text (SEO):</strong> Unique in its class! The plugin automatically detects and generates the <strong>ALT attribute</strong> for images that are missing it or have an empty ALT (<code>alt=""</code>), drastically improving your SEO and site accessibility.</li>
</ul>
<h3>💎 GioCompress PRO – Unlock Maximum Performance</h3>
<p>Upgrade to <strong>GioCompress PRO</strong> for total control and advanced features that take your image optimization to the next level:</p>
<ul>
<li><strong>Unlimited Optimization of Existing Images:</strong> No daily limits. Optimize your entire media library in one go!</li>
<li><strong>Customizable Compression Quality:</strong> You decide the perfect balance between visual quality and file size for every compression type.</li>
<li><strong>Automatic Resizing of Large Images:</strong> Giant photos will no longer slow down your site. The plugin automatically resizes them to ideal dimensions upon upload, saving space and bandwidth.</li>
<li><strong>Full AVIF Format Support:</strong> Access the next-generation image format for even more aggressive optimization (requires the Imagick library installed on your server).</li>
<li><strong>Lossy / Lossless Compression:</strong> Choose the compression mode that best suits your needs, for granular control over quality and file size (lossless compression is supported with Imagick).</li>
<li><strong>Remove EXIF/IPTC Data:</strong> Automatically remove unnecessary metadata from images (like date, camera model, geo-tags) to further reduce file sizes and protect privacy (works with the Imagick library installed on your server).</li>
<li><strong>Detailed Statistics and Space Saved:</strong> Keep track of how many images you’ve optimized and how much space you’ve saved on your server, with clear and intuitive reports.</li>
<li><strong>Orphan Data Cleanup:</strong> Remove unused or “orphan” images and metadata from your media library to keep it clean, efficient, and performant.</li>
<li><strong>Preserve Original File:</strong> If you prefer to keep a copy of the original JPEG/PNG file alongside the optimized version, the PRO option allows you to do so with a simple click.</li>
<li><strong>Dedicated Email Support:</strong> Receive priority assistance directly from our expert team for any questions or issues.</li>
</ul>
<h3>⚙️ How It Works</h3>
<p>Once activated, GioCompress works in the background completely automatically. It intercepts images uploaded to your site and processes them, optimizing and converting them into modern formats like WebP or AVIF. The optimized versions are then served on your site, guaranteeing quick loads and reduced bandwidth consumption. It’s a one-time setup, and then it does all the work for you!</p>
<h3>🎯 Who Is GioCompress For?</h3>
<ul>
<li><strong>Bloggers & Content Creators:</strong> For images that load instantly, captivating your audience.</li>
<li><strong>E-commerce Stores:</strong> For fast and optimized product pages that boost conversions and enhance the shopping experience.</li>
<li><strong>Businesses & Professionals:</strong> For a website that conveys speed, professionalism, and attention to detail.</li>
<li><strong>Web Developers & Agencies:</strong> To optimize numerous client sites with a lightweight, robust, and cost-effective solution.</li>
<li><strong>Anyone who wants to improve SEO and user experience</strong> on their WordPress site without compromising on quality or requiring advanced technical skills!</li>
</ul>


GioCompress

WordPress plugin for smart image optimization. Auto-converts to WebP, includes smart lazy loading, and generates missing alt text for better SEO.

AVIF Local Support vs GioCompress