When incoming requests match
- 
Custom filter expression:
- Media Type equals 
image/avifOR - File extension equals 
avif 
 - Media Type equals 
 
Then
- Compression options > Disable compression
 
Create a compression rule to turn off compression for AVIF images, based on either the content type or the file extension specified in the request.
The following example rule will disable compression for AVIF images, based on either the content type or the file extension specified in the request.
When incoming requests match
Custom filter expression:
image/avif ORavifThen
The following example sets the rules of an existing entry point ruleset (with ID {ruleset_id}) for the http_response_compression phase to a single compression rule, using the Update a zone ruleset operation:
curl --request PUT \https://api.cloudflare.com/client/v4/zones/{zone_id}/rulesets/{ruleset_id} \--header "Authorization: Bearer <API_TOKEN>" \--header "Content-Type: application/json" \--data '{  "rules": [    {      "expression": "http.response.content_type.media_type eq \"image/avif\" or http.request.uri.path.extension eq \"avif\"",      "action": "compress_response",      "action_parameters": {        "algorithms": [          { "name": "none" }        ]      }    }  ]}'