Optimize and convert WordPress images to WebP, AVIF, JPEG or PNG, review images used by a specific page, and manage Media Library bulk optimization with previews and rollback controls.
UWH Image Optimizer & Converter processes images locally using compatible GD, Imagick or ImageMagick capabilities on your hosting server. No third-party conversion account or cloud API is required. Available output formats depend on your server's encoders.
WordPress image compression and conversion
- Convert supported images into WebP, AVIF, JPEG or PNG with adjustable quality and maximum dimensions.
- Protect originals with a configurable minimum-savings requirement and optional retained backups.
- Skip animated GIFs to preserve animation; check source MIME, size, dimensions and memory requirements.
- Use single-image or bulk Media Library optimization with progress, pause, resume and cancellation.
- Compare before and after in a non-destructive preview, or run an analysis without changing files.
Optimize images by page or post
- Find local Media Library images referenced by Gutenberg blocks, Elementor content, featured images and common image URLs.
- Use the Page Image Action Planner to prioritize large source images and review image dimensions and Media Library alt text.
- Select which images to optimize without changing every image on the page automatically.
- See remote image references without downloading or modifying them.
Restore and manage images
- Maintain up to three saved rollback snapshots per attachment when storage is available.
- Inspect local conversion history, reported savings and restoration availability.
- Choose image output format, quality and dimensions per run without replacing your global settings.
- Keep existing attachment GUID values unchanged.
- Use the Universal Converter to add a converted image to the Media Library.
Important: Changing a Media Library image can affect every page using that attachment. Make a site backup before bulk processing. The Action Planner assesses stored source files, not measured website speed, LCP or Core Web Vitals. Empty Media Library alt text is a review prompt; decorative images may intentionally have an empty alt attribute.
- Upload the plugin ZIP through Plugins > Add New > Upload Plugin.
- Activate UWH Image Optimizer & Converter.
- Open UWH Image Optimizer from the WordPress admin menu.
- Review Settings, then optimize selected images, a specific page, or the Media Library.
Activation never starts conversion of existing Media Library files.