australcode

Australcode Uniform Images solves the classic WooCommerce catalog problem: product photos with different proportions that the theme crops brutally to align the grid. This plugin makes them uniform without cropping — it adds smart padding over a colored canvas (white by default), optionally trims the uniform background first to normalize inconsistent margins, and delivers each thumbnail in AVIF + WebP + JPEG using the <code><picture></code> element.
<h4>Key differentiators</h4>
<ul>
<li>No accidental crops — the entire product fits inside the thumbnail, always. Compare with “smart crop” plugins that guess the subject and sometimes fail on small or asymmetric products.</li>
<li>Real <code><picture></code> markup — multi-source with AVIF + WebP + JPEG fallback. Survives any page cache (LiteSpeed, WP Rocket, Cloudflare APO, W3 Total Cache) because it does not use <code>Vary: Accept</code>. The browser picks the optimal format; the cache serves HTML without negotiation.</li>
<li>4-tier quality preset — Maximum / High / Standard / Economy with per-format values calibrated (e.g. Standard = AVIF Q60, WebP Q82, JPEG Q85 — visually indistinguishable from the original at half the size).</li>
<li>HPOS-ready from day one — declares <code>custom_order_tables</code> and <code>cart_checkout_blocks</code> compatibility without any setup.</li>
<li>Cloudflare Image Transformations (CIT) — optional integration to serve via Cloudflare edge (<code>/cdn-cgi/image/format=auto</code>) with automatic availability detection on your zone. If CIT is not enabled on your CF plan, the plugin keeps serving local derivatives without breaking anything.</li>
</ul>
<h4>Free (no license required)</h4>
<ul>
<li>Bulk regenerate with Action Scheduler — async processing resumable after worker death, error classification (<code>oom</code>, <code>missing_original</code>, <code>engine_failed</code>, <code>fs_permission</code>), scope filters (<code>auto</code> = products only based on Settings; <code>all-used</code> = every image referenced in posts/products/Bricks templates/terms).</li>
<li>Embedded sample test — processes 1-5 images on demand and shows the before/after grid with bytes and % savings. Available on the Settings page (“Quick preview”) and on Bulk regenerate (“Generate sample”).</li>
<li>Health page with CDN detection — engine diagnostics, encoders, filesystem permissions, detected competing plugins (Smush/EWWW/ShortPixel/Imagify), Cloudflare Polish status (alerts if active — incompatible with the plugin’s AVIF/WebP), Image Prioritizer (Performance Lab) status with automatic detection.</li>
<li>WP-CLI — 9 commands — 7 free: <code>wp acimg health</code>, <code>stats</code>, <code>regenerate</code>, <code>derivatives <id></code>, <code>purge-cache</code>, <code>restore-originals</code>, <code>migrate-from-sir</code>. 2 Pro: <code>wp acimg doctor</code> (extended diagnostics) and <code>wp acimg reset</code> (full state reset).</li>
</ul>
<h4>Pro (license required)</h4>
<ul>
<li>Cloudflare Image Transformations (CIT) delivery — emits <code><img></code> with CIT URLs (<code>/cdn-cgi/image/format=auto</code>) instead of local derivatives when CIT is enabled on your zone. Defensive automatic fallback to the normal path if CIT is unavailable.</li>
<li>Media Library audit + cleanup — orphan image detector that understands Bricks Builder (PHP serialize), <code>wp_termmeta</code>, WooCommerce shortcodes, custom meta. Trash mode with typed confirmation, immutable audit log, and an <code>untrash</code> endpoint for rollback.</li>
<li>Image Health Monitor — weekly cron that scans for missing derivatives, stale derivatives, Cloudflare Polish conflicts, and storage usage. Email digest to the admin only when there are actionable findings.</li>
<li>AI Alt Text BYOK — alt text generation per attachment via OpenAI Vision (<code>gpt-4o-mini</code>) or Anthropic Vision (<code>claude-haiku-4-5</code>). Bring Your Own Key (no Merchant of Record over AI costs). Context enrichment with WooCommerce product title + category + brand.</li>
<li>Catalog Watch + Auto-Heal — daily cron that detects ghost derivatives (DB rows without files), orphan files (files without DB rows), products with broken thumbnails. Auto-heal with dry-run preview + strict path validation. Persistent admin notice when there are actionable issues.</li>
<li>Multi-Site Manager (Agency) — centralized dashboard to monitor up to 25 client sites from a single wp-admin. BYO Application Password, aggregated metrics (derivatives + bytes + issues), automatic hourly sync + ad-hoc. No external services: direct wp-admin ↔ wp-admin communication via native REST.</li>
<li>CIT Cost Analyzer — daily pull from Cloudflare GraphQL Analytics API. MTD cost + monthly projection + peak day to identify spikes. BYO API token (CF authenticates directly).</li>
</ul>
<h4>Integration with other plugins</h4>
<ul>
<li>Image Prioritizer / Performance Lab — Australcode Uniform Images detects <code>fetchpriority="high"</code> and propagates correct loading/decoding to the final <code><picture></code>. Native LCP optimization.</li>
<li>Bricks Builder — supports <code>wp_get_attachment_image</code> and optional output buffer rewriter for themes/page builders that bypass that filter.</li>
<li>WP Rocket / a3 Lazy Load — compatible with <code>data-src</code>/<code>data-sizes</code> lazy loaders (reads both if present).</li>
</ul>
<h4>v1.0 non-goals</h4>
<ul>
<li>Smart crop — would break the “no cropping” promise. If you need that, this plugin is not for you.</li>
<li>SaaS-only / phone home — the plugin is 100% local. All optimization happens on your own server.</li>
<li>JPEG XL — format still immature in browsers. We will reevaluate in 2027.</li>
</ul>
<h4>How it compares</h4>
 Concern 
 Smush / ShortPixel / Imagify 
 Australcode Uniform Images
 Product photo cropping 
 Smart crop (algorithm guesses) 
 None — pads to a uniform canvas, full product always visible
 Modern formats 
 WebP / AVIF (Pro/paid tiers) 
 AVIF + WebP + JPEG via <code><picture></code> element
 Free bulk limit 
 Capped (e.g. 150 images on the leading “same size” plugin; monthly credit quotas on optimizers) 
 Unlimited — regenerate your whole catalog on Free
 Free formats 
 WebP/AVIF behind paid tiers 
 AVIF + WebP + JPEG, all free
 Page cache 
 <code>Vary: Accept</code> (breaks LiteSpeed, WP Rocket, Cloudflare APO) 
 <code><picture></code> element (cache-safe by design)
 Pricing model 
 $5-15/month SaaS subscription 
 Annual or lifetime license, no SaaS dependency
 WooCommerce-specific 
 Generic optimizer 
 Built for product grids — reads <code>wp_get_registered_image_subsizes()</code>, respects WC thumbnail_cropping setting
 Processing location 
 SaaS server (your images leave) 
 100% local on your server
The other plugins optimize any image. Australcode Uniform Images does one job extremely well: uniform product thumbnails for WooCommerce grids, served cache-safe. If you already have one of the big plugins active, you can run Australcode side-by-side — it only touches images on registered WooCommerce sizes.
<h3>External services</h3>
This plugin connects to external services only when you explicitly enable or 
use the corresponding optional feature. The free, core functionality (uniform 
images, AVIF/WebP/JPEG <code><picture></code>, bulk regenerate, health) runs 100% on your 
own server and contacts no external service.
<h4>Freemius (account, licensing & secure checkout)</h4>
Australcode uses Freemius as its billing and licensing platform (Freemius is the 
Merchant of Record for Pro purchases). Connecting to Freemius is optional: on 
activation you can click “Skip” and the plugin stays fully functional without 
ever contacting Freemius.
<ul>
<li>If you opt in (free or Pro), the plugin sends your admin email, site 
URL and basic environment data (WordPress, PHP and plugin versions) to the 
Freemius API (host <code>api.freemius.com</code>, path <code>/v1/</code>) to create your account and 
check for updates.</li>
<li>If you activate a Pro license, the plugin sends your license key and 
site domain to Freemius to validate the license and enforce the per-plan 
site limit. The license is re-validated periodically.</li>
<li>Purchases and license management happen on Freemius-hosted pages 
(hosts <code>freemius.com</code>, <code>users.freemius.com</code>).</li>
</ul>
No data is sent to Freemius if you skip the opt-in and do not enter a license key.
<ul>
<li>Terms of Service: https://freemius.com/terms/</li>
<li>Privacy Policy: https://freemius.com/privacy/</li>
</ul>
<h4>OpenAI / Anthropic (AI Alt Text — Pro, Bring Your Own Key)</h4>
If you enable AI Alt Text and provide your own API key, the plugin sends the 
image (as a base64 data URI) plus the related WooCommerce product context 
(title, category, brand) to the provider you choose, to generate alt text:
<ul>
<li>OpenAI Vision (<code>gpt-4o-mini</code>) — host <code>api.openai.com</code>, path <code>/v1/chat/completions</code>
<ul>
<li>Terms: https://openai.com/policies/terms-of-use</li>
<li>Privacy: https://openai.com/policies/privacy-policy</li>
</ul>
</li>
<li>Anthropic Vision (<code>claude-haiku-4-5</code>) — host <code>api.anthropic.com</code>, path <code>/v1/messages</code>
<ul>
<li>Terms: https://www.anthropic.com/legal/consumer-terms</li>
<li>Privacy: https://www.anthropic.com/legal/privacy</li>
</ul>
</li>
</ul>
This runs only when you trigger alt text generation and only with the key you 
supply. The plugin is not a Merchant of Record for these AI costs (BYOK).
<h4>Cloudflare (Image Transformations + Cost Analyzer — Pro)</h4>
If you enable Cloudflare Image Transformations (CIT), image URLs of your own 
site are served through Cloudflare’s edge (<code>/cdn-cgi/image/...</code>) so Cloudflare can 
transform them on-demand. If you enable the CIT Cost Analyzer, the plugin 
queries the Cloudflare GraphQL Analytics API 
(host <code>api.cloudflare.com</code>, path <code>/client/v4/graphql</code>) with the API token you provide 
and your zone identifier, to report usage and cost. The plugin also performs a 
 HEAD request to one of your own derivative URLs to detect whether CIT and 
Cloudflare Polish are active on your zone (no third-party data is sent in that 
detection).
<ul>
<li>Terms of Service: https://www.cloudflare.com/terms/</li>
<li>Privacy Policy: https://www.cloudflare.com/privacypolicy/</li>
</ul>

Australcode Uniform Images

Make WooCommerce product images the same size without cropping. Unlimited bulk, free AVIF + WebP, and cache-safe delivery. No catalog limit.

Kraken.io

⚡ Compress, resize and convert your WordPress images to WebP, AVIF and more — automatically. Faster pages, smaller files, same quality.
Slow pages cost you visitors, search rankings and sales — and over-sized images are almost always the culprit. Kraken.io Image Optimizer fixes that on autopilot: it compresses, resizes and converts every image you upload — and every thumbnail WordPress generates — so your whole site loads lighter and faster, without you lifting a finger.
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.
At its heart is Kraken.io’s intelligent lossy engine: for every single image it finds the exact point where the file is as small as possible while staying visually indistinguishable from the original. Expect to cut 60% or more off your image weight — exactly the win Google PageSpeed and Core Web Vitals reward.
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.
<h4>✨ Why Kraken.io</h4>
<ul>
<li>Intelligent lossy & lossless — 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>Convert between formats — turn uploads into WebP, AVIF, JPEG, PNG or GIF. 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>Optimizes everything WordPress serves — the full-size image and every thumbnail size (thumbnail, medium, large, …) that actually reaches your visitors through responsive <code>srcset</code>.</li>
<li>PDFs too, not just images — PDF files in your Media Library are compressed through the same Kraken.io engine, so documents download and embed faster.</li>
<li>Smart resizing — cap oversized uploads to a maximum width/height; resized images are enhanced to stay sharp and avoid haloing.</li>
<li>Bulk “Krak ’em all” — optimize your entire existing library from a dedicated Bulk Optimize screen or the Media Library bulk action, with live progress.</li>
<li>A control panel that tells you everything — 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>Per-image savings & error badges — see exactly how much each image saved, right in the Media grid and list.</li>
<li>Plays nice with your stack — 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>
JPEG, PNG, animated GIF, WebP, AVIF, HEIC/HEIF and PDF. (For security, raw SVG upload is intentionally not enabled — see the FAQ.)
<h4>⚡ Built for Core Web Vitals</h4>
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: Properly size images, Efficiently encode images, Serve images in next-gen formats and Largest Contentful Paint.
<h4>🎛️ Your images, your control</h4>
<ul>
<li>Choose intelligent lossy or lossless, globally.</li>
<li>Convert uploads to WebP/AVIF/JPEG/PNG/GIF on the fly — synced live between the panel and settings.</li>
<li>Preserve selected EXIF tags (Date, Copyright, Geotag, Orientation, Profile) or strip them for the smallest files.</li>
<li>Auto-orient photos from phones and cameras by their EXIF orientation.</li>
<li>Decide who can optimize — all logged-in users, authors and up, or administrators only.</li>
<li>Pick exactly which image sizes 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>
Your API credentials are stored write-only 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.
<h4>🚀 Get started for free</h4>
<blockquote>
Create a <a href="https://kraken.io/pricing" title="Kraken.io – Plans and Pricing" rel="nofollow ugc">free Kraken.io account</a> — no credit card required — and get testing quota to try the plugin and the rest of the Kraken.io toolset:
<ul>
<li>A fully-featured optimization API with official libraries for PHP, Node.js, Python, Ruby, Java, Go and .NET</li>
<li>Web Interface (free) and Web Interface PRO with resizing and sync-to-Dropbox</li>
<li>URL Paster and Page Cruncher to optimize images in bulk from anywhere on the web</li>
<li>Optimization history and stats, and Kraken.io Cloud Storage</li>
</ul>
</blockquote>
You can use a single API key across as many sites as you like — there is no per-site license.
<blockquote>
★★★★★ Excellent option for image optimization 
 “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>
★★★★★ Quality results, quality service 
 “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>
★★★★★ Optimize according to Google PageSpeed 
 “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>
★★★★★ Perfect solution to speed up site! 
 “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>
</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.

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