Rafał Dziewa

<p>DZIEWA Media Converter creates sidecar <code>.avif</code> and <code>.webp</code> files next to your originals (no replacement of JPG/PNG in the Media Library). On the front end it can rewrite <code><img></code> tags to <code><picture></code> so browsers pick AVIF/WebP when available. The plugin is <strong>entirely free to use</strong> — no license fees, no pro version, and no paid add-ons.</p>
<h4>How it works</h4>
<p>The plugin generates additional AVIF and/or WebP files beside every JPEG/PNG you upload. Originals are never touched or replaced — they remain in the Media Library and on disk as a safe fallback. The optional content filter detects <code><img></code> tags in your post content and wraps them in <code><picture></code> so modern browsers download the smaller AVIF/WebP version, while older browsers transparently fall back to JPG/PNG.</p>
<h4>Conversion</h4>
<ul>
<li><strong>AVIF + WebP, AVIF-only or WebP-only</strong> output modes. AVIF requires PHP GD built with AVIF support; the plugin auto-detects this on activation and gracefully falls back to WebP-only when AVIF is unavailable.</li>
<li><strong>Configurable quality</strong> per format (independent AVIF and WebP quality sliders in settings).</li>
<li><strong>Automatic conversion on upload</strong> — new attachments are converted in the background via WP-Cron or Action Scheduler (when available), so the upload screen never blocks.</li>
<li><strong>Intermediate sizes (thumbnails)</strong> are optionally converted too, so every srcset variant has its own AVIF/WebP sidecar.</li>
</ul>
<h4>Existing media</h4>
<ul>
<li><strong>Background queue</strong> processes already-uploaded images in configurable batches (default 20 files per run, range 5–200). You can scope the queue to a single uploads subfolder and/or a date range to avoid scanning the whole library at once.</li>
<li><strong>Bulk action in the Media Library</strong> — select images and run <strong>Convert to AVIF/WebP</strong> from the bulk menu.</li>
<li><strong>Per-attachment button</strong> — Media Library list, attachment edit screen and media modal each show a <strong>Convert to AVIF/WebP</strong> button next to live savings stats (before/after size, percentage saved per format).</li>
</ul>
<h4>Front end (content rewriting)</h4>
<ul>
<li>Optional <code><picture></code> rewrite in <code>the_content</code> and post thumbnails — browsers automatically pick the lightest format they support.</li>
<li>Lookup of attachment IDs from URLs is cached in the WordPress object cache (Redis/Memcached when available) and memoised per request, so heavy pages with many images stay fast.</li>
</ul>
<h4>Tools & admin UI</h4>
<ul>
<li><strong>Cleanup tool</strong> — remove old generated <code>.avif</code> / <code>.webp</code> sidecars by age (30/60/90/120 days) and folder scope, with a per-folder picker.</li>
<li><strong>Admin bar download</strong> — optional link on singular posts/pages to download the original JPG/PNG of the featured image (useful for social platforms that don’t accept AVIF/WebP).</li>
<li><strong>Event log</strong> — last 100 events (errors, conversions, queue runs) visible on the settings page.</li>
<li><strong>Three-option uninstall dialog</strong> — when removing the plugin you choose between <em>Cancel</em>, <em>Remove (keep generated files)</em> or <em>Remove and delete files</em>.</li>
</ul>
<h4>Privacy & dependencies</h4>
<ul>
<li>No external services, no remote calls, no tracking. Everything runs on your own server.</li>
<li>Requires PHP 8.3+ and PHP GD with WebP support (<code>imagewebp</code>). AVIF is optional.</li>
<li>Fully translated to Polish; English source strings ready for further translations via GlotPress.</li>
</ul>


DZIEWA Media Converter — AVIF + WebP

Converts JPEG/PNG to AVIF and WebP; rewrites content to <picture> with JPG/PNG fallback. Completely free, no paid version.

CompressX

<p>CompressX is a free, lightweight WebP & AVIF conversion and media replacement plugin for WordPress. It allows you to easily convert JPG and PNG images to WebP and AVIF formats, compress WebP and AVIF images, and replace media files without changing their URLs or attachment IDs. All AVIF and WebP conversions are performed locally on your web server.</p>
<h3>Core Features</h3>
<h4>1. Convert AVIF & Compress AVIF</h4>
<p>Convert jpg, png, and WebP images on your WordPress website to AVIF format, and compress AVIF images according to the compression level you set.<br />
If the original image is already in AVIF format which is supported since WordPress 6.5, the original AVIF image will only be compressed.</p>
<h4>2. Convert WebP & Compress WebP</h4>
<p>Convert jpg, png images on your WordPress website to WebP format, and compress WebP images according to the compression level you set.<br />
If the original image is already in WebP format which is supported since WordPress 5.8, the original WebP image will only be compressed.</p>
<h4>3. Media Replacement & Auto Re-Optimization</h4>
<p>Safely replace an existing media file without changing its URL or attachment ID. When a new image is uploaded as a replacement, the system automatically regenerates thumbnails, applies your configured format conversion and compression rules, resizes where needed, and re-optimizes the file.</p>
<h4>4. Exclude Folders</h4>
<p>Select specific folders in your media library and prevent images inside them from being processed.</p>
<h4>5. Custom Folders</h4>
<p>Select folders that are in the wp-content folder but outside the Uploads (media library) and process images inside them.</p>
<h4>6. Auto-Process New Images</h4>
<p>Automatically convert new images uploaded to a WordPress website to WebP/AVIF format and compress WebP/AVIF images upon upload.</p>
<h4>7. Auto-Remove Large Images</h4>
<p>Automatically remove converted AVIF/WebP images when they are larger than original images.</p>
<h4>8. Restore Original Images</h4>
<p>Your images will be reverted to their original state and all AVIF/WebP images and data in the database generated by CompressX will be removed when CompressX is uninstalled.</p>
<h3>Minimum Requirements to use CompressX</h3>
<ul>
<li>Character Encoding UTF-8</li>
<li>PHP version 7.0</li>
<li>MySQL version 4.1</li>
<li>WordPress 5.8</li>
</ul>
<h3>External Services</h3>
<p>This plugin optionally connects to the <a href="https://api.cloudflare.com/" rel="nofollow ugc">Cloudflare API</a> to purge your CDN cache. It sends the Cloudflare Zone ID, account email, and Global API Key whenever the “Purge Cloudflare Cache” button is clicked or automatically upon optimization completion (if enabled in settings). This service is provided by Cloudflare, Inc: <a href="https://www.cloudflare.com/terms/" rel="nofollow ugc">Terms of Service</a>, <a href="https://www.cloudflare.com/privacypolicy/" rel="nofollow ugc">Privacy Policy</a>.</p>


CompressX — AVIF & WebP Converter, Media Replacement


It's all new, but I believe this can go far ! I was looking for a plugin with free AVIF conversion, and locally hosted (a lot of images plugins use their servers to compress, that's why a lot of them are expensive).Awesome support, totally free (for now ?), does the same thing as the famous Media Converter, but with free AVIF. Take my 5/5 rating ;)EDIT : Oh no wait, it does more than media converter, allowing you to set a max width / height on your images :fire:


This may be my future goto plugin for image optimisation


Deserves 5-stars just for vision and generosity in making this exist!



Will give it a thorough test and post any feedback as we go.



Thank you 🙏


The world thanks you!


I usually don't review plugins but this one is just magnificent! Amazing developers!


Amazing plugin


یکی از بهترین افزونه‌هایی که برای تبدیل و بهینه سازی تصاویر میتونید استفاده کنید قطعا این افزونه هست. این افزونه با امکانات متنوع و مناسب، سرعت بالا و دقت و کیفیت عالی باعث شده در سایت وردپرس ایرانی هم به عنوان یکی از بهترین افزونه‌های تبدیل فرمت شناخته بشه. به نظرم هرچی افزونه دارید دور بریزید و این افزونه شگفت انگیز رو نصب کنید. جزئیات و راهنمایی نصب و انجام تنظیمات مناسب برای این افزونه رو میتونید در مقاله‌ای که "وردپرس ایرانی" منتشر کرده مشاهده کنید


بهترین افزونه تبدیل تصاویر | تشکر از سازنده

AVIF & WebP converter with built-in media replacement for local image optimization.

DZIEWA Media Converter — AVIF + WebP vs CompressX — AVIF & WebP Converter, Media Replacement