Image Optimizer, Resizer and CDN – Sirv vs StaticDelivr

Accelerate your website and improve SEO with Sirv – the most complete image CDN and media optimization plugin for WordPress & WooCommerce. Automatically resize, compress and serve videos & images in next-gen formats, from Sirv’s fast CDN in 25 major cities. Why is Sirv the best choice for WordPress image optimization? Automatic optimization Automatic scaled images Automatic next-gen formats (AVIF & WebP) Smaller files than any other WP optimization plugin Incredibly fast CDN Perfect on WooCommerce Lazy loading The best WordPress image optimizer – you don’t need to lift a finger. Just install the plugin and Sirv will automatically serve perfectly scaled and optimized images possible file-size. Every option is easily configured, if you wish to change the defaults. Optimize your WordPress Media Library Automatically optimize your existing WordPress media library images, without lifting a finger. Sirv can automatically copy your media library to Sirv, from where images will be served as highly optimized images across Sirv’s fast, global WordPress CDN (19 worldwide locations). All these images (and more) can be automatically optimized by Sirv: Media gallery images Featured images WooCommerce product & category images Images added via other plugins or scripts Images added via “Add Media” button CSS background images Simply enable the Sirv CDN and images will sync to your Sirv account automatically. See the complete list of features of Sirv’s fresh new take on media hosting and optimization. Take your WooCommerce sales to another level Optimization & CDN delivery of all your product images Ultra-deep image zoom, 3D GLB models and 360-spin for your media viewer Add image watermarks Add text captions Serves your files wherever you need them – websites, apps, feeds, social media, email campaigns Image zoom Sirv loves huge images – it can zoom deep inside them very fast. No matter how big, images load fast, just like zooming on a Google Map. The bigger your images, the more impressive this image zoom is – perfect if you have really high quality images. Video streaming Any video you upload to Sirv will be converted to different resolution video streams, for instant playback. Every user will receive the most optimal stream for their device, screen and network connection speed. 3D models (GLB and USDZ) Upload your 3D models to Sirv and embed them in your web pages and product galleries. It’s easy and automated with Sirv Media Viewer. No coding needed. It also provides Augmented Reality (AR) automatically. 360 spin Shoppers adore spinning products around to see them from all sides. If you’re selling something online, maybe with WooCommerce, Sirv provides a stunning 360-degree photography experience. Simply upload a set of photos and a 360 spin will be immediately ready to embed in your page. It feels incredible on desktop and mobile alike, especially the big full-screen 360 spin view. Try demos. Free and paid plans are available, depending on your needs. See “Price Plans” below. What our users say ★★★★★ “We’ve halved the load time on mobiles of a site that we had already done quite a bit of work on to get image sizes down.” @martingfisher ★★★★★ “So far the best CDN plugin for WordPress. Please, never disappear!” @mavenickster ★★★★★ “I was looking for a CDN fast and easy (no need to code)! Sirv is the best – Just upload your photos to your WordPress library and voilà “roulez jeunesse!!!” (French expression). Very good service!” @disconance ★★★★★ “Sirv is fantastic! I have a lot of images on my website, and most of them are large, which resulted in slow site speeds, even with a CDN. What I love about Sirv is that they offer a CDN service, but also dynamically resize images based on the user’s browser/device, and serve the right file type. It has meant HUGE speed improvements on my website.” @basellen Optimal format (every time) Google loves next-gen image formats for SEO, but it’s a pain to convert all your images and keep track of them. Sirv solves that. It automatically delivers images to each user in the most optimal format. Usually that’ll be AVIF or WebP and the filesize is dramatically smaller, so Google will reward you with better search ranking. Sirv’s intelligence always serves the smallest possible file format to each users’ browser. It is 100% automatic. Plus, images are automatically scaled down to the suitable width/height and they’re lazy loaded, so you’ll really have the best possible image solution for WordPress. Price plans Sirv is a professional image hosting and WordPress CDN service. Most websites require a paid plan. Sirv also provides a free plan for light usage (500 MB storage and 2 GB monthly transfer). Free 0.5 GB storage, $0/month Business 5 GB storage, $19/month Business 12 GB storage, $39/month Business 20 GB storage, $59/month Business 40 GB storage, $89/month Business 60 GB storage, $119/month Business 100 GB storage, $199/month Enterprise: tailored to your needs – Contact us. Create a Sirv account. We believe in fair and transparent pricing: Upgrade/downgrade any time. Start/stop any time. Complete and easy access to your images. No credit card required for the Free plan. Further reading Keep learning with these helpful resources: Sirv for WordPress documentation. Sirv for WooCommerce documentation. The official Sirv Help Center & Documentation. Serve images from your own domain name. Next steps… Create your Sirv account Login to your Sirv account

StaticDelivr CDN is a lightweight and powerful plugin designed to improve your WordPress site’s performance. By rewriting theme, plugin, core file resource URLs, optimizing images, and proxying Google Fonts through the StaticDelivr CDN, the plugin ensures faster loading times, reduced server load, better privacy, and an improved user experience. StaticDelivr is a global content delivery network (CDN) that supports delivering assets from various platforms like npm, GitHub, and WordPress. By leveraging geographically distributed servers, StaticDelivr optimizes the delivery of your static assets such as CSS, JavaScript, images, and fonts. Key Features Smart Asset Detection: Automatically detects which themes and plugins are from wordpress.org and only serves those via CDN. Custom themes and plugins are served locally. No configuration needed! Failure Memory System: If a CDN resource fails to load, the plugin remembers and automatically serves it locally for 24 hours. No more repeated failures! Automatic URL Rewriting: Automatically rewrites URLs of enqueued styles, scripts, and core files for themes, plugins, and WordPress itself to use the StaticDelivr CDN. Image Optimization: Automatically optimizes images with compression and modern format conversion (WebP, AVIF). Turn 2MB images into 20KB without quality loss! Google Fonts Privacy Proxy: Serve Google Fonts without tracking (GDPR compliant). A drop-in replacement that strips all user-identifying data and tracking cookies. Automatic Fallback: If a CDN asset fails to load, the plugin automatically falls back to your origin server, ensuring your site never breaks. Localhost Detection: Automatically detects development environments and serves images locally when CDN cannot reach them. Child Theme Support: Intelligently handles child themes by checking parent theme availability on wordpress.org. Separate Controls: Enable or disable assets (CSS/JS), image optimization, and Google Fonts proxy independently. Quality & Format Settings: Customize image compression quality and output format. Verification Dashboard: See exactly which assets are served via CDN vs locally in the admin panel. Failure Statistics: View which resources have failed and are being served locally, with option to clear cache. Compatibility: Works seamlessly with all WordPress themes and plugins — both from wordpress.org and custom/premium sources. Improved Performance: Delivers assets from the StaticDelivr CDN for lightning-fast loading and enhanced user experience. Multi-CDN Support: Leverages multiple CDNs to ensure optimal availability and performance. Free and Open Source: Supports the open-source community by offering free access to a high-performance CDN. Use of Third-Party Service This plugin relies on the StaticDelivr CDN to deliver static assets, including WordPress themes, plugins, core files, optimized images, and Google Fonts. The CDN uses the public WordPress SVN repository to fetch theme/plugin files and serves them through a globally distributed network for faster performance and reduced bandwidth costs. Service Terms of Use: StaticDelivr Terms Privacy Policy: StaticDelivr Privacy Policy How It Works StaticDelivr CDN rewrites your WordPress asset URLs to deliver them through its high-performance network: Smart Asset Detection The plugin automatically verifies which themes and plugins exist on wordpress.org: WordPress.org Assets: Served via StaticDelivr CDN for maximum performance Custom/Premium Assets: Automatically detected and served from your server Child Themes: Parent theme is checked. If the parent is on wordpress.org, assets load via CDN This means the plugin “just works” with any combination of wordpress.org and custom themes/plugins! Failure Memory System (New in 1.7.0!) The plugin learns from CDN failures and automatically adapts: First failure: Fallback fires, failure is recorded Second failure: Resource is blocked from CDN for 24 hours Auto-recovery: After 24 hours, resources are retried automatically Manual reset: Clear the failure cache anytime from settings This ensures that problematic resources (Cloudflare-protected images, auth-gated content, etc.) are handled gracefully without repeated failures. Assets (CSS & JavaScript) Original URL: `https://example.com/wp-content/themes/theme-name/version/style.css` Rewritten CDN URL: `https://cdn.staticdelivr.com/wp/themes/theme-name/version/style.css` This process applies to themes, plugins, and core files: Themes: Original: `https://example.com/wp-content/themes/twentytwentythree/1.0/style.css` CDN: `https://cdn.staticdelivr.com/wp/themes/twentytwentythree/1.0/style.css` Plugins: Original: `https://example.com/wp-content/plugins/woocommerce/assets/js/frontend/woocommerce.min.js` CDN: `https://cdn.staticdelivr.com/wp/plugins/woocommerce/tags/9.3.3/assets/js/frontend/woocommerce.min.js` Core Files: Original: `https://example.com/wp-includes/js/jquery/jquery.min.js` CDN: `https://cdn.staticdelivr.com/wp/core/tags/6.9/wp-includes/js/jquery/jquery.min.js` Images Original: `https://example.com/wp-content/uploads/2024/01/photo.jpg` (2MB) Optimized CDN: `https://cdn.staticdelivr.com/img/images?url=https://example.com/wp-content/uploads/2024/01/photo.jpg&q=80&format=webp` (~20KB) Google Fonts Original CSS: `https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap` Privacy Proxy: `https://cdn.staticdelivr.com/gfonts/css2?family=Inter:wght@400;500;600&display=swap` Original Font Files: `https://fonts.gstatic.com/s/inter/v20/example.woff2` Privacy Proxy: `https://cdn.staticdelivr.com/gstatic-fonts/s/inter/v20/example.woff2` This ensures faster delivery through StaticDelivr’s globally distributed network while protecting user privacy. Why Use StaticDelivr? Zero Configuration: Smart detection means it works out of the box with any theme/plugin combination. Self-Healing: Failure memory system automatically adapts to problematic resources. Global Distribution: StaticDelivr serves your assets from a globally distributed network, reducing latency and improving load times. Massive Bandwidth Savings: Offload heavy image delivery to StaticDelivr. Optimized images can be 10-100x smaller! Privacy-First Google Fonts: Serve Google Fonts without tracking cookies — GDPR compliant without additional cookie banners. Works with Custom Themes: Unlike other CDN plugins, StaticDelivr automatically detects custom themes/plugins and serves them locally. Browser Caching Benefits: As an open-source CDN used by many sites, assets served by StaticDelivr are likely already cached in users’ browsers. This enables faster load times when visiting multiple sites using StaticDelivr. Significant Bandwidth Savings: Reduces your site’s bandwidth usage and number of requests significantly by offloading asset delivery to StaticDelivr. Optimized Performance: Ensures assets are delivered quickly, no matter where your users are located. Comprehensive WordPress Support: Includes support for delivering core WordPress files (e.g., those in the `wp-includes` directory) to enhance site speed and reliability. Support for Popular Platforms: Easily integrates with npm, GitHub, WordPress, and Google Fonts. Minimal Configuration: Just enable the features you want and the plugin handles the rest. Development Friendly: Automatically detects localhost and development environments. Translations StaticDelivr CDN is available in the following languages: English (default) Spanish (Español) – es_ES, es_MX French (Français) – fr_FR German (Deutsch) – de_DE Italian (Italiano) – it_IT Portuguese Brazil (Português) – pt_BR Dutch (Nederlands) – nl_NL Japanese (日本語) – ja Chinese Simplified (简体中文) – zh_CN Chinese Traditional (繁體中文) – zh_TW Russian (Русский) – ru_RU Arabic (العربية) – ar Korean (한국어) – ko_KR Turkish (Türkçe) – tr_TR Polish (Polski) – pl_PL Ukrainian (Українська) – uk Czech (Čeština) – cs_CZ Hungarian (Magyar) – hu_HU Romanian (Română) – ro_RO Swedish (Svenska) – sv_SE Danish (Dansk) – da_DK Finnish (Suomi) – fi Hebrew (עברית) – he_IL Persian (فارسی) – fa_IR Hindi (हिन्दी) – hi Vietnamese (Tiếng Việt) – vi Thai (ไทย) – th Indonesian (Bahasa Indonesia) – id_ID Urdu (اردو) – ur Want to help translate StaticDelivr CDN into your language? Visit translate.wordpress.org to contribute! License This plugin is licensed under the GPLv2 or later. See License URI for details.