Transformers

Transformers are middleware for validating, enriching, and redacting events in the walkerOS pipeline. Together with Mapping, they give you full control over how events are shaped before reaching destinations.

Use cases

Use Case	Example
Validate	Ensure events match JSON Schema contracts
Enrich	Add server-side data (user segments, geo)
Redact	Remove PII before sending to destinations

Configuration

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Available transformers

Validator

Validates events using JSON Schema:

• Format validation (WalkerOS.Event structure)
• Contract validation (entity/action business rules)
• Configurable logging for validation results

Learn more →

Next steps

• Validator - JSON Schema validation
• Create your own - Custom transformer guide