For AI agents: a Markdown version of this page is at https://docs.snowplow.io/docs/api-reference/snowbridge/configuration/transformations/builtin.md. The index of all documentation pages is at https://docs.snowplow.io/llms.txt, and the index for this section is at https://docs.snowplow.io/docs/api-reference/llms.txt.

Built-in Snowbridge transformations

Snowbridge includes several configurable built-in transformations.

Transformation	Functionality	Snowplow data only
`base64Decode`	Base64-decodes the message's data.
`base64Encode`	Base64 encodes the message's data.
`jq`	Runs a `jq` command on the message data, and outputs the result of the command.
`jqFilter`	Filters messages based on the output of a `jq` command.
`spEnrichedFilter`	Filters messages based on a regex match against an atomic field.	✅
`spEnrichedFilterContext`	Filters messages based on a regex match against a field in an entity.	✅
`spEnrichedFilterUnstructEvent`	Filters messages based on a regex match against a field in a custom event.	✅
`spEnrichedSetPk`	Sets the message's destination partition key.	✅
`spEnrichedToJson`	Transforms a message's data from Snowplow enriched tsv string format to a JSON object.	✅
`spGtmssPreview`	Attaches a GTM SS preview mode header	✅

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