Enable Zstandard compression for default content types

Dashboard

The following example rule will turn on Zstandard compression for response content types where Cloudflare applies compression by default. If the client does not support Zstandard compression, it will use Brotli or Gzip compression as a fallback.

When incoming requests match

• Custom filter expression:

  • Media Type is in text/html, text/richtext, text/plain, text/css, text/x-script, text/x-component, text/x-java-source, text/x-markdown, application/javascript, application/x-javascript, text/javascript, text/js, image/x-icon, image/vnd.microsoft.icon, application/x-perl, application/x-httpd-cgi, text/xml, application/xml, application/rss+xml, application/vnd.api+json, application/x-protobuf, application/json, multipart/bag, multipart/mixed, application/xhtml+xml, font/ttf, font/otf, font/x-woff, image/svg+xml, application/vnd.ms-fontobject, application/ttf, application/x-ttf, application/otf, application/x-otf, application/truetype, application/opentype, application/x-opentype, application/font-woff, application/eot, application/font, application/font-sfnt, application/wasm, application/javascript-binast, application/manifest+json, application/ld+json, application/graphql+json, application/geo+json

Then

• Compression options: Custom
• Define a custom order for compression types: Zstandard, Brotli, Gzip

API

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 in {\"text/html\" \"text/richtext\" \"text/plain\" \"text/css\" \"text/x-script\" \"text/x-component\" \"text/x-java-source\" \"text/x-markdown\" \"application/javascript\" \"application/x-javascript\" \"text/javascript\" \"text/js\" \"image/x-icon\" \"image/vnd.microsoft.icon\" \"application/x-perl\" \"application/x-httpd-cgi\" \"text/xml\" \"application/xml\" \"application/rss+xml\" \"application/vnd.api+json\" \"application/x-protobuf\" \"application/json\" \"multipart/bag\" \"multipart/mixed\" \"application/xhtml+xml\" \"font/ttf\" \"font/otf\" \"font/x-woff\" \"image/svg+xml\" \"application/vnd.ms-fontobject\" \"application/ttf\" \"application/x-ttf\" \"application/otf\" \"application/x-otf\" \"application/truetype\" \"application/opentype\" \"application/x-opentype\" \"application/font-woff\" \"application/eot\" \"application/font\" \"application/font-sfnt\" \"application/wasm\" \"application/javascript-binast\" \"application/manifest+json\" \"application/ld+json\" \"application/graphql+json\" \"application/geo+json\"})",
      "action": "compress_response",
      "action_parameters": {
        "algorithms": [
          { "name": "zstd" },
          { "name": "brotli" },
          { "name": "gzip" }
        ]
      }
    }
  ]
}'