Local WebP optimizer for WordPress. Free converts images to WebP; Pro adds AVIF and site-wide image tools.
Alternatives to Slimify
Plugins below are selected for functional relevance and current directory signals. Active-install counts do not affect this ranking.
Relevant replacements
WordPress plugins with similar use cases
Compatibility and update metadata provide context, not a quality guarantee. Review each plugin’s details for your site.
Automatically compress JPEG, PNG, and WebP images on upload. Reduce file sizes up to 80% without visible quality loss.
Pewit AI Image Optimizerv1.1.3.3
Smart JPEG/PNG compression with WebP/AVIF sidecars, AV1 WebM video sidecars (ffmpeg) and backup-first bulk jobs (Pro).
FlipWebPv1.0.3
Convert Media Library images to WebP and reduce their file size, one at a time or in bulk.
Speed up your website. Optimize your JPEG, PNG, and WebP images automatically with TinyPNG.
Image Optimizer is an easy-to-use WordPress plugin that reduces image size through various compression and resizing techniques – all of which preserve …
Optimize every image in your Media Library in one click. Originals are always kept safe, and WebP/AVIF versions are served automatically.
WordPress image optimizer: compress JPEG/PNG, convert to WebP/AVIF, resize large uploads and serve responsive images with couic.
Automatically compress JPEG, PNG and GIF images on upload. Bulk optimize your media library, keep backups, and track savings per image.
Local WebP/AVIF sidecar conversion, savings statistics, media library tools, background processing, WP-CLI, and optional server-level delivery.