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.

Kraken.io

<p><strong>⚡ Compress, resize and convert your WordPress images to WebP, AVIF and more — automatically. Faster pages, smaller files, same quality.</strong></p>
<p>Slow pages cost you visitors, search rankings and sales — and over-sized images are almost always the culprit. <strong>Kraken.io Image Optimizer</strong> fixes that on autopilot: it compresses, resizes and converts every image you upload — <em>and</em> every thumbnail WordPress generates — so your whole site loads lighter and faster, without you lifting a finger.</p>
<p>Every upload is sent to <a href="https://kraken.io" title="Kraken.io Image Optimizer" rel="nofollow ugc">Kraken.io</a>, one of the most advanced image-optimization APIs on the web, optimized in the cloud, and pulled straight back into your Media Library. No binaries, no command line, no server tweaks — install it, add your API key, and stop worrying about heavy images.</p>
<p>At its heart is Kraken.io’s <strong>intelligent lossy</strong> engine: for every single image it finds the exact point where the file is as small as possible while staying <em>visually indistinguishable from the original</em>. Expect to cut <strong>60% or more</strong> off your image weight — exactly the win Google PageSpeed and Core Web Vitals reward.</p>
<p>From a personal blog to a busy WooCommerce store with tens of thousands of products, it’s an install-and-forget solution that just works.</p>
<h4>✨ Why Kraken.io</h4>
<ul>
<li><strong>Intelligent lossy & lossless</strong> — pick maximum savings with no visible quality loss, or pixel-perfect lossless. Per-image JPEG quality and chroma subsampling control for power users.</li>
<li><strong>Convert between formats</strong> — turn uploads into <strong>WebP</strong>, <strong>AVIF</strong>, <strong>JPEG</strong>, <strong>PNG</strong> or <strong>GIF</strong>. Reach for next-gen WebP or AVIF for the biggest savings (and to clear Google’s “Serve images in next-gen formats” audit), or switch between the classics — whatever fits your site.</li>
<li><strong>Optimizes everything WordPress serves</strong> — the full-size image <em>and</em> every thumbnail size (thumbnail, medium, large, …) that actually reaches your visitors through responsive <code>srcset</code>.</li>
<li><strong>PDFs too, not just images</strong> — PDF files in your Media Library are compressed through the same Kraken.io engine, so documents download and embed faster.</li>
<li><strong>Smart resizing</strong> — cap oversized uploads to a maximum width/height; resized images are <em>enhanced</em> to stay sharp and avoid haloing.</li>
<li><strong>Bulk “Krak ’em all”</strong> — optimize your entire existing library from a dedicated Bulk Optimize screen or the Media Library bulk action, with live progress.</li>
<li><strong>A control panel that tells you everything</strong> — a Kraken.io summary panel on the Media Library, Add Media and Plugins screens (plus a Dashboard widget) shows your connection status, plan, quota usage, active settings and supported formats at a glance.</li>
<li><strong>Per-image savings & error badges</strong> — see exactly how much each image saved, right in the Media grid and list.</li>
<li><strong>Plays nice with your stack</strong> — works with multisite, page builders, CDNs and local/dev sites. Detects other optimizer plugins and offers one-click deactivation so they don’t fight over your images.</li>
</ul>
<h4>🖼️ Supported formats</h4>
<p>JPEG, PNG, animated GIF, <strong>WebP</strong>, <strong>AVIF</strong>, <strong>HEIC/HEIF</strong> and <strong>PDF</strong>. (For security, raw SVG upload is intentionally not enabled — see the FAQ.)</p>
<h4>⚡ Built for Core Web Vitals</h4>
<p>Heavy images are the number-one cause of slow pages. By compressing every size, converting to WebP/AVIF and right-sizing oversized uploads, Kraken.io directly targets the audits that move your score: <em>Properly size images</em>, <em>Efficiently encode images</em>, <em>Serve images in next-gen formats</em> and <em>Largest Contentful Paint</em>.</p>
<h4>🎛️ Your images, your control</h4>
<ul>
<li>Choose <strong>intelligent lossy</strong> or <strong>lossless</strong>, globally.</li>
<li><strong>Convert</strong> uploads to WebP/AVIF/JPEG/PNG/GIF on the fly — synced live between the panel and settings.</li>
<li>Preserve selected <strong>EXIF</strong> tags (Date, Copyright, Geotag, Orientation, Profile) or strip them for the smallest files.</li>
<li><strong>Auto-orient</strong> photos from phones and cameras by their EXIF orientation.</li>
<li>Decide <strong>who can optimize</strong> — all logged-in users, authors and up, or administrators only.</li>
<li>Pick exactly <strong>which image sizes</strong> to optimize (the large 1536×1536 and 2048×2048 retina sizes are off by default to save quota — turn them on if your theme serves them).</li>
<li>Optimize on upload automatically, or defer and bulk-optimize later.</li>
</ul>
<h4>🔒 Private & secure by design</h4>
<p>Your API credentials are stored <strong>write-only</strong> and masked — they are never pre-filled into the page or exposed in your site’s source, so other users on the dashboard can’t read them. Every action is protected by nonces and capability checks, uploads are content-verified, and all optimization happens server-to-server with Kraken.io. No secrets ever reach the browser.</p>
<h4>🚀 Get started for free</h4>
<blockquote>
<p><strong>Create a <a href="https://kraken.io/pricing" title="Kraken.io – Plans and Pricing" rel="nofollow ugc">free Kraken.io account</a></strong> — no credit card required — and get testing quota to try the plugin and the rest of the Kraken.io toolset:</p>
<ul>
<li>A fully-featured optimization <strong>API</strong> with official libraries for PHP, Node.js, Python, Ruby, Java, Go and .NET</li>
<li><strong>Web Interface</strong> (free) and <strong>Web Interface PRO</strong> with resizing and sync-to-Dropbox</li>
<li><strong>URL Paster</strong> and <strong>Page Cruncher</strong> to optimize images in bulk from anywhere on the web</li>
<li>Optimization <strong>history and stats</strong>, and Kraken.io Cloud Storage</li>
</ul>
</blockquote>
<p>You can use a single API key across as many sites as you like — there is no per-site license.</p>
<blockquote>
<p>★★★★★ <strong>Excellent option for image optimization</strong><br />
  “The real power of Kraken is their ‘intelligent lossy’ optimization. I use it on all my sites and have never once needed to roll back an image because of too much quality degradation. It is a perfect solution as is.” — <a href="https://profiles.wordpress.org/collinmbarrett" rel="nofollow ugc">collin</a></p>
<p>★★★★★ <strong>Quality results, quality service</strong><br />
  “The plugin works really well and effortlessly, and the support is prompt, thoughtful, and thorough. I’m hooked.” — <a href="https://profiles.wordpress.org/illustrata" rel="nofollow ugc">illustrata</a></p>
<p>★★★★★ <strong>Optimize according to Google PageSpeed</strong><br />
  “Kraken was instrumental in optimizing images to comply with Google’s PageSpeed analyzing tool. Our travel blog now sports Google’s ‘mobile friendly’ tag for mobile searches.” — <a href="https://profiles.wordpress.org/qualterio" rel="nofollow ugc">Walter Schaerer</a></p>
<p>★★★★★ <strong>Perfect solution to speed up site!</strong><br />
  “I love this plugin! All my questions are quickly responded to and I see a huge saving in image size without losing quality. Highly recommend!” — <a href="https://profiles.wordpress.org/ezone69" rel="nofollow ugc">ezone69</a></p>
</blockquote>
<h4>Connect with Kraken.io</h4>
<ul>
<li>Website: <a href="https://kraken.io" rel="nofollow ugc">https://kraken.io</a></li>
<li>Plans & pricing: <a href="https://kraken.io/pricing" rel="nofollow ugc">https://kraken.io/pricing</a></li>
<li><a href="https://twitter.com/KrakenIO" title="@KrakenIO" rel="nofollow ugc">Twitter / X</a> · <a href="https://www.facebook.com/krakenio" title="Kraken.io" rel="nofollow ugc">Facebook</a> · <a href="https://github.com/kraken-io" title="Kraken.io on GitHub" rel="nofollow ugc">GitHub</a></li>
</ul>


Kraken.io Image Optimizer – Compress, Convert to WebP & AVIF, Resize & Bulk Optimize

- It works with 1 image but not at Google PageSpeed standard
- It doesn't work with bulk action
- The worst thing is I inputted my credit card there and they refused to let me cancel my subscription, what a very bad thing from kraken.io

Does not work for bulk actions, subscription cannot be cancelled

As others are noting here, their customer service is terrible. In fact I'd use the word "non-existent".

After signing up with an account I decided that the service was no longer what I needed and contacted them to delete my account. Multiple times, in different ways, I've contacted their customer support about this and never had a response. Currently breaching GDPR rules, they're going to be reported.

Thank goodness I never handed over any payments to them.

Terrible Customer Service

Optimize images automatically — compress, resize and convert to WebP, AVIF & more with Kraken.io. Faster pages, smaller files, same quality.

CompressX — AVIF & WebP Converter, Media Replacement vs Kraken.io Image Optimizer – Compress, Convert to WebP & AVIF, Resize & Bulk Optimize