Rafał Dziewa

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 entirely free to use — no license fees, no pro version, and no paid add-ons.
<h4>How it works</h4>
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.
<h4>Conversion</h4>
<ul>
<li>AVIF + WebP, AVIF-only or WebP-only 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>Configurable quality per format (independent AVIF and WebP quality sliders in settings).</li>
<li>Automatic conversion on upload — new attachments are converted in the background via WP-Cron or Action Scheduler (when available), so the upload screen never blocks.</li>
<li>Intermediate sizes (thumbnails) are optionally converted too, so every srcset variant has its own AVIF/WebP sidecar.</li>
</ul>
<h4>Existing media</h4>
<ul>
<li>Background queue 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>Bulk action in the Media Library — select images and run Convert to AVIF/WebP from the bulk menu.</li>
<li>Per-attachment button — Media Library list, attachment edit screen and media modal each show a Convert to AVIF/WebP 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>Cleanup tool — 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>Admin bar download — 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>Event log — last 100 events (errors, conversions, queue runs) visible on the settings page.</li>
<li>Three-option uninstall dialog — when removing the plugin you choose between Cancel, Remove (keep generated files) or Remove and delete files.</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.

edaniels

<h3>The Complete Media Performance Solution for WordPress</h3>
Automatically reduce image and video sizes by up to 70% and improve Core Web Vitals — no setup required.
Flux Media Optimizer is the all-in-one media optimizer plugin for WordPress – optimize images, compress videos, and deliver everything through a global CDN for lightning-fast page loads worldwide.
Transform your WordPress site’s media performance with Flux Media Optimizer. Compress images, convert to next-gen formats (WebP & AVIF), optimize videos with modern formats (AV1, WebM), and serve media through a global CDN, all while maintaining the visual quality your visitors expect.
All core features are available in the free version. Gain additional benefits including offloaded processing, global CDN delivery, and advanced compression algorithms when you <a href="https://fluxplugins.com/media-optimizer/" rel="nofollow ugc">purchase a license</a>.
<h3>Professional-Grade Media Optimization</h3>
Flux Media Optimizer boosts your site’s performance metrics and Google PageSpeed Insights scores with intelligently compressed and optimized media. Real-world performance improvements translate directly to better user experiences, higher engagement, and improved search rankings.
Key Features:
<ul>
<li>Hybrid Image Optimization – Automatically creates both WebP and AVIF formats for optimal performance and browser compatibility</li>
<li>Smart Format Serving – Uses <code><picture></code> tags or direct URL replacement based on settings for maximum compatibility</li>
<li>Video Optimization – FFmpeg-powered MP4/WebM generation with size & quality controls</li>
<li>GIF Support – Full support for static and animated GIFs with animation preservation (Imagick required for local animated GIF conversion)</li>
<li>Automatic Processing – Convert on upload and bulk process existing media with one click</li>
<li>Quality Control – Configurable quality settings with version-specific AVIF optimization</li>
<li>Individual File Controls – Disable or manually reconvert individual files for granular control</li>
<li>Media Library Status – Optimization column and filters in the Media Library list view (Optimized, Pending, Failed, Disabled, Unprocessed)</li>
<li>Gutenberg Block Integration – View image compression information directly in image blocks</li>
<li>WordPress Integration – Seamless integration with galleries, responsive images, and all WordPress image functions</li>
<li>Optimize All Image Files – Supports optimization for PNG, JPEG, and GIF files</li>
<li>No Limits – Optimize all of your images and videos up to your server’s capabilities</li>
<li>Global CDN Delivery (License Only) – Optimized assets stored on Flux’s Google Cloud CDN, ensuring lightning-fast delivery worldwide</li>
<li>Offloaded Processing (License Only) – Heavy image/video conversion tasks handled by external service, reducing load on your server</li>
<li>Secure Integration – Uses license key authentication and secure webhooks for reliable communication</li>
</ul>
Perfect for:
<ul>
<li>Bloggers and content creators who want faster sites</li>
<li>E-commerce stores needing better Core Web Vitals scores</li>
<li>Anyone serious about website performance and SEO</li>
</ul>
Ready to supercharge your site’s performance? Install Flux Media Optimizer today for instant image and video optimization.
<h3>Next-Gen Formats – WebP & AVIF Conversion</h3>
Flux Media Optimizer automatically converts your images to modern WebP and AVIF formats, delivering superior compression and quality retention. These next-generation formats are recognized by all major performance testing tools, including Google PageSpeed Insights, as essential for optimal site performance.
Performance benefits: WebP lossless images average 26% smaller than PNGs, while WebP lossy images are typically 25-34% smaller than comparable JPG images. AVIF images achieve up to 60% size reduction compared to JPG or PNG formats.
Simple setup: Flux Media Optimizer’s hybrid approach enables easy implementation with local hosting – no CDN required. The plugin automatically serves WebP or AVIF images to supported browsers while maintaining fallbacks for older browsers, ensuring maximum compatibility.
Flux Media Optimizer supports next-gen conversion for all image formats, including JPEG, PNG and GIF to WebP/AVIF. Stop compromising on image quality or site performance – get both with Flux Media Optimizer.
<h3>Intelligent Compression Without Quality Loss (with License)</h3>
Flux Media Optimizer uses advanced compression algorithms to reduce file sizes significantly without compromising visual quality. The plugin removes unnecessary metadata and optimizes image data, resulting in smaller files that look identical to the originals.
Local Processing: With local optimization, you have full control over your compression settings, allowing you to optimize according to your specific needs. Available formats depend on your server’s installed libraries (GD, Imagick, FFmpeg).
Remote Processing (License Only): Our optimization engine analyzes each image to determine the best compression strategy, ensuring maximum file size reduction while maintaining the visual quality standards your visitors expect. All processing happens on our servers, reducing load on your server while delivering optimal results.
<h3>Privacy</h3>
Default Behavior: 
By default, all image and video processing happens locally on your server. Your media files never leave your WordPress installation unless you explicitly opt-in to external processing services.
Optional External Service: 
This plugin includes an optional external service integration that provides: 
* External File Processing: Offloads heavy image and video conversion tasks to external servers, reducing load on your server 
* CDN Integration: Stores all media files on a global CDN for faster delivery worldwide. Images and videos are processed and optimized, while other file types (PDFs, documents, etc.) are stored directly for CDN delivery
What Data is Sent: 
When the external service is enabled (requires explicit user activation and a license key), the following data is sent to the external service: 
* All media files (images, videos, PDFs, documents, etc.) that you upload 
* Images and videos are processed and optimized; other file types are stored directly on the CDN 
* Attachment metadata (file names, sizes, formats) 
* License key for authentication 
* Account ID (UUID) for service identification
When Data is Sent: 
Data is only sent when: 
* The external service is explicitly enabled by the user in plugin settings 
* A valid license key is provided and activated 
* Media files are uploaded or conversion is requested
Service Provider: 
The external service is provided by Flux Plugins: 
* Terms of Service: https://fluxplugins.com/terms-of-service/ 
* Privacy Policy: https://fluxplugins.com/privacy-policy/
Important Notes: 
* External service is completely optional – all core functionality works locally without it 
* External service requires explicit user consent and license activation 
* You can disable external service at any time to return to local-only processing 
* By default, the plugin uses local processing only
<h3>Privacy Policy</h3>
Flux Media Optimizer is committed to protecting your privacy. By default, all image and video processing happens locally on your server – your media files never leave your WordPress installation.
View our full privacy policy: <a href="https://fluxplugins.com/privacy-policy/" rel="nofollow ugc">https://fluxplugins.com/privacy-policy/</a>
Key points: 
* Local processing by default – no external data sharing 
* Email collection for marketing purposes only with opt-in consent 
* Account ID (UUID) generation: The plugin generates a unique identifier (UUID) locally on your server for service identification purposes. This UUID is stored only in your WordPress database and is used to match webhook requests and license validation when you explicitly enable external services. The UUID is NOT used for user tracking or analytics. It is automatically removed when you uninstall the plugin. The UUID is only transmitted to external services when you explicitly enable external processing AND provide a license key. 
* Full compliance with WordPress.org guidelines and privacy regulations

Flux Media Optimizer – Image & Video Optimization by Flux Plugins

Automatically optimize images, compress videos and deliver media via global CDN. Boost Core Web Vitals and SEO with 50-70% smaller file sizes.

DZIEWA Media Converter — AVIF + WebP vs Flux Media Optimizer – Image & Video Optimization by Flux Plugins