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By default, the image optimizer will remove all metadata embedded in an image. The metadata parameter allows this behavior to be configured.

Syntax

metadata={value}

Allowed values

Value	Description
`copyright`	Preserve copyright notice, creator, credit line, licensor, and web statement of rights fields.
`c2pa`	Preserve the C2PA manifest and add any transformations performed by Fastly Image Optimizer.
`copyright,c2pa`	Apply both `c2pa` and `copyright` metadata filters.

Notes

The copyright parameter is only effective when the source and destination format are both jpeg.
C2PA is enabled for all image formats except for when the output format is JPEGXL.
C2PA manifests are supported up to version 2.4.
When using c2pa, a C2PA manifest is only attached to the transformed image if the source image has one to begin with. Otherwise, the parameter is ignored and a warning is added to the Fastly-Io-Warning header.