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WebberZone Image Optimizer is a free WebP converter and AVIF converter for WordPress. It converts the JPEG, PNG and GIF images already in your media library to WebP and AVIF, optimizes new uploads automatically, and serves each visitor the smallest file their browser can read. Images are typically 40\u201360% smaller with no visible difference, so pages load faster and score better on PageSpeed Insights and Core Web Vitals.<\/p>\n\n
Everything happens on your own server. Your images are never uploaded anywhere. The plugin makes no outbound network requests of any kind \u2014 there is no external service, no API key, no monthly image quota, no account to create and nothing that can stop working because a company shut down or changed its pricing. AVIF is not a paid upgrade: every feature is free.<\/p>\n\n
Almost certainly nothing you do not already have. WordPress cannot crop or resize an uploaded image without either the Imagick<\/strong> or the GD<\/strong> extension, so every working WordPress install already has one of them, and both have been able to write WebP for years.<\/p>\n\n You do not have to guess. The plugin tests your server by actually encoding a small image with each backend at activation, rather than trusting what the extension claims to support, and the settings screen shows you exactly which formats came back working. If AVIF is unavailable the option is simply marked as such and WebP carries on normally.<\/p>\n\n By default, each optimized copy is written alongside the original with the new extension appended, so You can also compress the original JPEG and PNG files themselves. JPEG compression uses Imagick or GD at the quality you choose; PNG compression uses a local oxipng or pngquant tool when your server has one. A maximum image dimension resizes oversized uploads and, optionally, existing originals. Every change is backed up first, and Restore originals reverses it. Both features are off by default. Deactivation stops optimized delivery but does not restore compressed originals.<\/p>\n\n Images are wrapped in a Responsive images are handled properly. Each format's For images referenced from a stylesheet, where the browser is never offered a choice, the Delivery tab generates ready-to-paste Apache and nginx rules, complete with the The bulk screen works through a database-backed queue one batch at a time. Close the tab and nothing is lost; a background worker carries on, and reopening the screen resumes exactly where it stopped. Failures are retried a few times and then listed with the reason.<\/p>\n\n By default, originals are unchanged and modern copies are separate files. Enable Compress original images to recompress served JPEG\/PNG files with mandatory backups. Restore originals reverses compression and optional resizing. The unscaled upload retained by WordPress is left untouched.<\/p><\/dd>\n Your site immediately goes back to serving the original images. The generated files stay on disk, so reactivating restores the optimization instantly without converting anything again.<\/p><\/dd>\n No. The No. Conversion and JPEG compression run on your own server with Imagick or GD, the image libraries WordPress already uses; PNG compression also needs oxipng or pngquant on the server. There is no sign-up, no monthly quota and no limit on how many images you convert, and it works the same on staging and local sites.<\/p><\/dd>\n Yes. There is no paid version; WebP, AVIF, bulk conversion, compression and WP-CLI are all included. AVIF only needs a server that can encode it, and the settings screen tells you whether yours can.<\/p><\/dd>\n Smaller images mean fewer bytes to download, which is what PageSpeed Insights measures in its image delivery audit and what most often slows Largest Contentful Paint. The plugin does not lazy load images or change their dimensions, so keep whatever handles those today.<\/p><\/dd>\n\n
Compress and resize JPEG and PNG originals<\/h4>\n\n
photo.jpg<\/code> gains photo.jpg.webp<\/code>, and the original is left unchanged. The File naming<\/em> setting can switch this to replacing the extension instead (photo.webp<\/code>) \u2014 see the settings screen for the trade-off before turning it on.<\/p>\n\nServe WebP and AVIF with the picture element, safe behind caches and CDNs<\/h4>\n\n
<picture><\/code> element, so the browser<\/em> chooses the format. That matters more than it sounds: the common alternative is to vary the response on the Accept<\/code> header, which returns different bytes for a single URL. Any cache in front of that \u2014 a page cache plugin, a CDN \u2014 which ignores Vary<\/code> will happily hand a WebP file to a browser that cannot display it. A <picture><\/code> element has no such failure mode.<\/p>\n\n<source><\/code> lists only the optimized srcset<\/code> candidates that exist, with their descriptors preserved exactly. Missing intermediate copies are omitted, while a missing smallest, widest or highest-density copy withholds that format so the optimized set always covers the same range as the original set. The original <img><\/code> remains as the fallback.<\/p>\n\nVary: Accept<\/code> header those rules require.<\/p>\n\nBulk optimize your existing media library<\/h4>\n\n
Features<\/h4>\n\n
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wp wzio status<\/code>, convert<\/code>, queue<\/code>, run<\/code>, clean<\/code><\/li>\n\n
webberzone-image-optimizer<\/code> folder to \/wp-content\/plugins\/<\/code>.<\/li>\n\n
Will this touch my original images?<\/h3><\/dt>\n
What happens if I deactivate the plugin?<\/h3><\/dt>\n
Do I need to change my server configuration?<\/h3><\/dt>\n
<picture><\/code> rewrite needs nothing beyond activating the plugin. Server rules are only needed for images referenced from CSS, and they are optional.<\/p><\/dd>\nDo I need an API key or an account?<\/h3><\/dt>\n
Is AVIF conversion free?<\/h3><\/dt>\n
Will this improve my PageSpeed Insights score?<\/h3><\/dt>\n
I am switching from another image optimizer. Do I have to convert everything again?<\/h3><\/dt>\n