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

⚡ 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 Kraken.io, 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. ✨ Why Kraken.io 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. 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. Optimizes everything WordPress serves — the full-size image and every thumbnail size (thumbnail, medium, large, …) that actually reaches your visitors through responsive srcset. 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. Smart resizing — cap oversized uploads to a maximum width/height; resized images are enhanced to stay sharp and avoid haloing. Bulk “Krak ’em all” — optimize your entire existing library from a dedicated Bulk Optimize screen or the Media Library bulk action, with live progress. 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. Per-image savings & error badges — see exactly how much each image saved, right in the Media grid and list. 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. 🖼️ Supported formats JPEG, PNG, animated GIF, WebP, AVIF, HEIC/HEIF and PDF. (For security, raw SVG upload is intentionally not enabled — see the FAQ.) ⚡ Built for Core Web Vitals 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. 🎛️ Your images, your control Choose intelligent lossy or lossless, globally. Convert uploads to WebP/AVIF/JPEG/PNG/GIF on the fly — synced live between the panel and settings. Preserve selected EXIF tags (Date, Copyright, Geotag, Orientation, Profile) or strip them for the smallest files. Auto-orient photos from phones and cameras by their EXIF orientation. Decide who can optimize — all logged-in users, authors and up, or administrators only. 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). Optimize on upload automatically, or defer and bulk-optimize later. 🔒 Private & secure by design 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. 🚀 Get started for free Create a free Kraken.io account — no credit card required — and get testing quota to try the plugin and the rest of the Kraken.io toolset: A fully-featured optimization API with official libraries for PHP, Node.js, Python, Ruby, Java, Go and .NET Web Interface (free) and Web Interface PRO with resizing and sync-to-Dropbox URL Paster and Page Cruncher to optimize images in bulk from anywhere on the web Optimization history and stats, and Kraken.io Cloud Storage You can use a single API key across as many sites as you like — there is no per-site license. ★★★★★ 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.” — collin ★★★★★ Quality results, quality service “The plugin works really well and effortlessly, and the support is prompt, thoughtful, and thorough. I’m hooked.” — illustrata ★★★★★ 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.” — Walter Schaerer ★★★★★ 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!” — ezone69 Connect with Kraken.io Website: https://kraken.io Plans & pricing: https://kraken.io/pricing Twitter / X · Facebook · GitHub

Perfect Images handles the basics of WordPress image management that should have been built-in from the start. Manage image sizes, disable the ones you don’t need, add custom sizes, and regenerate thumbnails in bulk. It’s the essential foundation every WordPress install needs for clean, efficient image handling. Think of it as your image management base layer. WordPress creates too many sizes? Disable them. Need a custom thumbnail size? Add it. Want retina support or modern formats like WebP/AVIF? Enable those modules. Perfect Images gives you complete control without bloat. Explore our official site and check out the tutorial to get started. Core Features ⚙️ Image Size Management The foundation of everything. View all registered image sizes (WordPress defaults, theme sizes, plugin sizes), disable the ones you don’t need, and add custom sizes. Finally, control over those pesky WordPress-generated sizes like medium_large, 1536x1536, and 2048x2048. 🔄 Regenerate Thumbnails Bulk regenerate thumbnails after changing sizes or switching themes. Progress tracking, smart processing, and automatic cleanup of old unused sizes. 🖼️ Retina Images (Module) Optional module for high-DPI displays. Automatically generate and serve crisp @2x versions of your thumbnails. Works seamlessly with WordPress responsive images. 🎨 Modern Formats (Module) Optional WebP/AVIF conversion. Convert images to modern formats for smaller file sizes and faster loading—without replacing your originals. 🚀 Easy IO (Module) Optional CDN-based image optimization via EWWW. Automatically converts and delivers your images in WebP/AVIF, resizes on the fly, and serves them from a global CDN—zero server configuration required. 🤖 AI Features (Module) Optional AI-powered tools. Upscale images via Claid.ai when your source is too small, or use the AI Assistant to analyze your sizes and recommend which to enable or disable based on your theme’s srcset needs. 🖼️ Retina Images Your visitors expect sharp, crisp images. Perfect Images makes retina support effortless. Smart Generation: Automatic retina creation for all thumbnail sizes Multiple delivery methods (Responsive Images, PictureFill, Retina.js) Works with WordPress srcset natively Full-size retina support Delivery Options: Responsive Images: Modern, standard method PictureFill: Hybrid approach with fallbacks Retina.js: Client-side detection Choose what fits your theme best 🎨 Modern Formats WebP and AVIF offer dramatically better compression than JPEG/PNG—up to 50% smaller files with the same visual quality. What You Get: Generate WebP or AVIF for any image size Automatic browser detection and fallbacks Works alongside your original images Enable for thumbnails or full-size Responsive Images delivery built-in 🤖 AI Features Perfect Images integrates with AI services to help you manage and optimize your images smarter. AI Assistant: Analyzes your image sizes and recommends which to enable or disable Detects redundant retina sizes already covered by other thumbnails Understands srcset behavior—sizes don’t need to be pixel-perfect Requires AI Engine plugin Upscaling (via Claid.ai): Generate retina images without 2x source files Create thumbnails larger than the original image Multiple upscaling modes (Smart Enhance, Digital Art, Photo, etc.) Automatic or manual processing ⚙️ Image Tools The Image Tools dashboard lets you manage all your media in one place—regenerate thumbnails, build retina images, generate WebP/AVIF, and more, individually or in bulk. Regenerate Thumbnails: Bulk regenerate all thumbnails Progress tracking for large libraries Preserves custom crops Updates retina and WebP versions automatically Replace Images: Swap images directly from Media Library Drag & drop replacement in dashboard Maintains all metadata and links Updates all thumbnails instantly Manage Sizes: View all registered image sizes Disable unwanted sizes (medium_large, 1536×1536, etc.) Create custom sizes Track which sizes are enabled per image Disable Image Threshold: Stop WordPress from creating “-scaled” versions Keep your original full-size images intact Pro Features Full-size retina images Full-size WebP/AVIF conversion Priority support Why Perfect Images? Essential Foundation Every WordPress site needs proper image size management and thumbnail control. Perfect Images makes it simple, giving you the baseline image handling WordPress should have included. Modular & Lightweight Start with just image size management and thumbnail regeneration. Enable retina, WebP, Easy IO, or AI modules only when you need them. No bloat, no unnecessary features. Works with Everything Compatible with WooCommerce, page builders, galleries, and any theme. It uses WordPress’s native image handling, so there are no conflicts. No Database Bloat Everything works through WordPress’s existing metadata structure. No custom tables, no performance overhead. Built for Real Workflows Developed by someone who manages dozens of WordPress sites. Every feature solves a real problem we’ve encountered over years of WordPress development.