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Vacuum Image Optimizer1.0.1
1.0.11 min read

Frontend Delivery

Serve generated WebP or AVIF files on the frontend while preserving original fallback behavior.

Frontend Delivery lets visitors receive generated modern formats when available.

Delivery model

Vacuum hooks into WordPress image output and srcset generation. It can adjust image attributes and responsive candidates so generated WebP or AVIF files are used when appropriate.

Preferred format

PreferenceBehavior
AutoPrefer AVIF when available, then WebP, then original.
AVIFPrefer AVIF with original fallback.
WebPPrefer WebP with original fallback.

Safety

Stored media URLs in post content are not permanently rewritten. If frontend delivery is disabled, the original WordPress image output remains available.

Related articles

WebPGenerate WebP derivatives for JPEG and PNG sources and optimize supported WebP uploads.AVIFEnable optional AVIF generation when Imagick or GD can read and write AVIF images.Lazy LoadingApply native lazy loading attributes through WordPress image output filters.