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Vacuum Image Optimizer1.0.1
1.0.11 min read

WebP

Generate WebP derivatives for JPEG and PNG sources and optimize supported WebP uploads.

WebP is the primary modern format in Vacuum Image Optimizer. Version 1.0.1 supports WebP output for JPEG and PNG sources and safe WebP source optimization for uploaded WebP files.

How WebP generation works

For JPEG and PNG source images, Vacuum writes a WebP derivative next to the original file. The original source remains in place, and WordPress attachment metadata records the WebP path, URL, size, engine, and savings.

How WebP source optimization works

For WebP uploads, Vacuum can recompress the source file itself. This path is backup-first and only replaces the source when the optimized candidate is smaller.

Server support

WebP requires either:

  • Imagick with WEBP format support.
  • GD with imagewebp and compatible source read functions.

Use System Status to confirm read and write support.

Related articles

Frontend DeliveryServe generated WebP or AVIF files on the frontend while preserving original fallback behavior.Supported FormatsReview supported source formats, skipped formats, and output behavior for WebP and AVIF.WebP Source OptimizationLearn how version 1.0.1 safely recompresses uploaded WebP source files when smaller.