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Vacuum Image Optimizer1.0.1
1.0.11 min read

WebP Source Optimization

Learn how version 1.0.1 safely recompresses uploaded WebP source files when smaller.

WebP source optimization is the main format expansion in version 1.0.1.

Why it is different

JPEG and PNG optimization creates a separate WebP derivative. A WebP upload is already the target format, so Vacuum can optimize the source file itself. That makes backup safety more important.

Safety rules

  • A backup is created before replacement when backups are enabled.
  • A temporary optimized candidate is generated first.
  • The source is replaced only when the candidate is smaller.
  • Metadata records _vacimg_webp_source_optimized when savings are achieved.
  • Restore can copy the backup over the source and clear optimization metadata.

When it skips

WebP source optimization skips when WebP read or write support is unavailable, the source is unreadable, the file is excluded, or the optimized candidate is not smaller.

Related articles

WebPGenerate WebP derivatives for JPEG and PNG sources and optimize supported WebP uploads.Backup & RestoreKeep restorable originals before optimization and use restore actions when needed.Backup SystemUnderstand backup paths, metadata, retention, cleanup, and restore-safe source handling.