Generate WebP and AVIF Sidecars
Create modern formats for originals and WordPress-generated image sizes.
Applies to 1.0.1+
Free
Stable
Verified August 3, 2026
A sidecar uses the source filename plus .webp or .avif and does not replace attachment metadata by default.
Open the feature
Go to Media > Media Optimizer > Optimize.
Before you start
- Confirm enough free disk space for sidecars.
Recommended workflow
- Choose a small attachment set or bounded queue.
- Run optimization.
- Review per-file results and savings.
- Open a generated sidecar URL directly.
What success looks like
- Fresh sidecars exist beside the expected source sizes.
- Failed formats fall back without changing the original.
Important notes
- AVIF availability depends on the image editor or avifenc support.
Release and support resources
Continue from Media Optimizer documentation to the complete product workflow.
Review the product page for the current release, installation options, and support resources.
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