QuickWebP – WebP & AVIF Image Optimizer, Compression & SEO for WordPress vs ShortPixel Adaptive Images – WebP, AVIF, CDN, Image Optimization

QuickWebP helps you optimize images in WordPress as soon as they are uploaded. It converts JPG and PNG files to WebP, compresses them locally without any external API, cleans filenames for better image SEO, pre-fills media metadata, and resizes oversized uploads automatically. If you want even smaller next-generation images, QuickWebP Pro adds AVIF conversion for supported servers. It is designed for faster pages, better Core Web Vitals, and a simpler image workflow inside the WordPress media library. QuickWebP Free vs Pro QuickWebP Free includes Automatic WebP conversion on upload Local image compression without any external API SEO-friendly filename cleanup Automatic image metadata pre-fill for alt text, caption, description, legend, and title Automatic resize with maximum width and height controls Uses the native WordPress image editor with the best available server backend Bulk optimization for older media when originals are preserved Clipboard paste support inside the WordPress media frame Optimization preview inside the settings screen ⭐️ QuickWebP Pro includes ⭐️ Everything included in QuickWebP Free AVIF conversion for supported servers with PHP 8.1+ Smaller files than JPG, PNG, and typically smaller than WebP 🚀 Unlock AVIF conversion and more with QuickWebP Pro: Upgrade now Important QuickWebP is also available inside WPMasterToolKit. If you prefer an all-in-one toolkit, install WPMasterToolKit and enable the Media Encoder module. If you want the dedicated QuickWebP experience and access to AVIF, discover QuickWebP Pro. Why site owners use QuickWebP Improve WordPress performance with lighter images Reduce page weight to help Core Web Vitals Keep image SEO cleaner with optimized filenames and metadata Convert and compress images directly on your server Manage image optimization from one simple settings page Demos How to install QuickWebP Paste a picture from the clipboard into WordPress media More from Webdeclic QuickWebP is developed by Webdeclic. If you want a broader WordPress toolbox, also check Webdeclic plugins. Support If you like QuickWebP, please leave a 5-star review on WordPress.org. If you want to support the project, you can do it here: Buy me a coffee

An easy-to-use plugin that lets you solve any problems with images and improve your website’s Core Web Vitals in a minute. Imagine if you could solve all your website’s image-related problems and increase pagespeed and performance with a simple click, would not that be great? Usually, images are the biggest resource on a web page. With just one click, ShortPixel Adaptive Images replaces all the pictures on your website with properly sized, smartly-cropped and optimized images and uploads them to ShortPixel’s global CDN. And for even more Google love, the plugin delivers next-gen WebP or AVIF images to the right browsers auto-magically! 🙂 Using ShortPixel Adaptive Images also helps with Core Web Vitals (CWV)‘s Largest Contentful Paint (LCP), First Input Delay (FID) and Cumulative Layout Shift (CLS). This is an important SEO factor that Google uses to rank pages. The smaller the CWV values are, the better for your website. Do I need this plugin? If you have a WordPress website with images, the answer is most likely yes! Have you ever tested your website with tools like PageSpeed Insights or GTmetrix and received complaints that the images are not the right size or are too big? Or that you should be using “next gen” images like WebP or AVIF? Or that the website should “defer offscreen images”? ShortPixel Adaptive Images comes to the rescue and solves the problems with images on your website in no time. In addition to images, CSS, JS and font files are also minimized and delivered from our global CDN. What are the benefits? What are the features? new! you can now set your custom domain to serve images or JSS/CSS files, e.g. cdn.example.com. Read more here. new, lightweight, pure JavaScript Adaptive Images Engine (jQuery no longer required) same visual quality, but smaller images thanks to ShortPixel algorithms smart cropping – see an example serve only images of appropriate size, depending on the viewport of the visitor lazy load support with adjustable threshold; browser native lazy loading support is also available automatically serves WebP and AVIF images to browsers that support this format. Animated GIFs are also supported and can will converted to animated WebP and animated AVIF! caching and serving from a global CDN for images as well as CSS, JS and fonts CSS/JS files are minimized automatically all major image galleries, sliders and page builders are supported onboarding wizard with a tool that suggests the best settings for each website support for low quality image placeholders (LQIP) support for JPEG, PNG, GIF, TIFF, BMP no need for a separate AVIF or WebP converter plugin, the original images are automatically converted to WebP or AVIF adjustable size breakpoints when resizing images possibility to disable plugin functionality for logged in users multiple types of exclusions available, including and advanced Image Checker Tool Easy and Advanced mode for settings with a variety of settings for an increased flexibility of the plugin functionality Do I need an account to test this plugin? No, just install it and activate it on your WordPress website. You will then automatically receive 500 MB of CDN traffic every month. That’s about 500 visits/month! How much does it cost? When using ShortPixel Adaptive Images, only CDN traffic is counted if you choose to use our CDN. With the free plan, you get 100 credits for image optimization, which is equivalent to 500 MB of CDN traffic or about 500 visits/month. Paid plans start at $4.99 and are available as both one-time and monthly plans. Even better, if you already use ShortPixel Image Optimizer, you can use the same credits for ShortPixel Adaptive Images! How does it work? Different visitors have different devices (laptop, mobile phone, tablet), each with its own screen resolution. ShortPixel AI takes into account the resolution of the device and then provides the right size image for each placeholder. Let us take a web page with a single image of 640×480 pixels. When viewed from a laptop, the image retains its 640×480 pixel size, but is optimized and delivered from our CDN. When the same web page is viewed from a mobile phone, the image (for example) is resized to 300×225 pixels, optimized, and delivered via our CDN. In this way, neither time nor bandwidth is wasted for visitors. Other plugins by ShortPixel: FastPixel Caching – WP Optimization made easy ShortPixel Image Optimizer – Image optimization & compression for all the images on your website, including WebP & AVIF delivery Enable Media Replace – Easily replace images or files in Media Library reGenerate Thumbnails Advanced – Easily regenerate thumbnails Resize Image After Upload – Automatically resize each uploaded image WP SVG Images – Secure upload of SVG files to Media Library Get in touch! Email https://shortpixel.com/contact Twitter https://twitter.com/shortpixel WP CLI commands Use the following WP CLI commands to clear the CSS cache and the Low Quality Image Placeholders: wp shortpixel clear_css wp shortpixel clear_lqips For developers If there are main images in the Media Library that end with the usual thumbnail size suffix (e.g. -100×100), please set this in wp-config.php: define('SPAI_FILENAME_RESOLUTION_UNSAFE', true); If you need to do post-processing in JavaScript after the image/tag has been updated by ShortPixel AI, you can add a callback like this: jQuery( document ).ready(function() { ShortPixelAI.registerCallback('element-updated', function(elm){ // elm is the jQuery object, elm[0] is the tag console.log("element updated: " + elm.prop('nodeName')); }); }); To change the original URL of the image that is detected by ShortPixel, use this filter that receives the original URL: add_filter('shortpixel/ai/originalUrl', 'my_function'); To return your own custom URL for each language domain for the same website (single plugin installation), use this filter: add_filter(‘shortpixel/ai/cdnUrl’, function($cdn_url) { switch($_SERVER[‘HTTP_HOST’]) { //this is the domain name without protocol case ‘mydomain.com’: //that’s your main domain return “https://images.mydomain.com/spai”; case 'mydomain.fr': //that's your french language domain return "https://images.mydomain.fr/spai"; default: return $cdn_url; } }); Sometimes when the option to crop images is enabled, SPAI thinks it is not safe to crop an image, but you want to crop it anyway. Please add this attribute to force cropping: --> this will completely exclude from processing the image which has this attribute; --> this will exclude the image from being lazy-loaded by the plugin; --> this will prevent the image from being resized by the plugin. For adding custom replacement rules use: add_filter('shortpixel/ai/customRules', 'my_function'); The function is given an array and should append ShortPixel\AI\TagRule instances to the given array , as in the example below. A real-world example of custom image attributes, a custom srcset, and a custom JSON data attribute: add_filter('shortpixel/ai/customRules', 'spai_to_iconic'); function spai_to_iconic($tagRules) { //lazy-loaded data-iconic-woothumbs-src attribute $tagRules[] = new ShortPixel\AI\TagRule('img', 'data-iconic-woothumbs-src'); //eager attribute $tagRules[] = new ShortPixel\AI\TagRule('img', 'data-large_image', false, false, false, false, true); //lazy srcset style attribute. $tagRules[] = new ShortPixel\AI\TagRule('img', 'srcset', false, false, false, false, false, 'srcset', 'replace_custom_srcset'); $tagRules[] = new ShortPixel\AI\TagRule('div', 'data-default', 'iconic-woothumbs-all-images-wrap', false, false, false, false, 'srcset', 'replace_custom_json_attr'); return $tagRules; } The parameters of the rule are, in this order: * tagName – the tag name * attribute to be replaced * classFilter – only elements having the class, default false * attrFilter – only elements having the attribute, default false * attrValFilter only elements having the attribute with the specified value, default false * mergeAttr – advanced usage (see code), default false * eager – if true the image is replaced server-side, otherwise is lazy-loaded * type – advanced usage (see code), default is ‘url’, can also be ‘srcset’ if it has a srcset or json structure * callback – advanced usage (see code), default false. Needs to be ‘replace_custom_srcset’ if the type is srcset, or ‘replace_custom_json_attr’ if the type is json * quickMatch – advanced usage (see code), default false * frontEager -advanced usage (see code), default false In the same manner if you need a rule to be applied only on the front-end (javascript) you can use the following filter: add_filter('shortpixel/ai/customFrontendRules', 'my_function'); This rule will only be applied by the New JS Engine (so you need to have the option enabled) and is useful if you have content that is rendered by JavaScript and you need the replacement to be made after the content is rendered.