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.

Freemius

Harv

<p>Harvify Image Optimizer helps WordPress administrators convert Media Library images to modern WebP and AVIF formats without running heavy compression work inside PHP.</p>
<p>The plugin scans lightweight attachment metadata first, then your browser converts selected images in a small queue. Images are processed with Web Workers and OffscreenCanvas where available, uploaded back through authenticated WordPress REST API requests, and released from browser memory as each item finishes.</p>
<p>This client-side approach is designed for shared hosting environments where PHP memory limits and execution timeouts can interrupt large image optimization jobs.</p>
<h4>Key features</h4>
<ul>
<li>Convert JPEG, PNG, WebP, and AVIF source images to WebP or AVIF.</li>
<li>Scan one source format at a time so existing target-format images are not accidentally reprocessed.</li>
<li>Select a few images for a test run before processing the full queue.</li>
<li>Skip small files, very large images, selected upload paths, or filename patterns.</li>
<li>Deliver Pro sidecar variants through PHP picture tags when available.</li>
<li>Adjust quality and queue concurrency from the admin screen.</li>
<li>Save queue state in the browser with IndexedDB so work can resume after interruption.</li>
<li>Keep wp-admin responsive by doing conversion work in browser workers.</li>
<li>Process images locally in your browser without using an external optimization API.</li>
<li>Optional original-file deletion, disabled by default.</li>
</ul>
<h4>Privacy and external services</h4>
<p>Harvify Image Optimizer does not send images to a third-party compression service, load scripts from external CDNs, or track usage. Images are fetched by your browser from your own WordPress site and uploaded back to your own WordPress REST API.</p>
<p>AVIF encoding uses bundled WebAssembly encoder files. The current AVIF path uses the Apache-2.0 licensed @jsquash/avif single-thread encoder, with the earlier bundled wasm-avif encoder retained as a local fallback.</p>
<h4>Format testing</h4>
<p>If you want to experiment with AVIF conversion outside your WordPress Media Library first, you can use this browser-based test tool:</p>
<p><a href="https://conversores.online/en/avif-to-png-converter/" rel="nofollow ugc">AVIF to PNG Converter</a></p>


Harvify Image Optimizer for WebP and AVIF

Convert Media Library images to WebP or AVIF locally in your browser.

Skyspeed – Image Optimizer, WebP & AVIF Converter vs Harvify Image Optimizer for WebP and AVIF