# Kafka Connect DropHeaders SMT Usage Reference for Confluent Cloud The `org.apache.kafka.connect.transforms.DropHeaders` Apache Kafka® Single Message Transformation (SMT) drops one or more headers from each record. ## Example This configuration snippet shows how to use `DropHeaders` to drop the headers named `app.id` and `txn.id`. ```json "transforms": "dropAppIdHeader", "transforms.dropAppIdHeader.type": "org.apache.kafka.connect.transforms.DropHeaders", "transforms.dropAppIdHeader.headers": "app.id,txn.id" ``` Before: Headers `app.id` and `txn.id` included in records. After: Headers `app.id` and `txn.id` dropped from records. ## Properties | Name | Description | Type | | Valid Values | Importance | |-----------|-----------------------------------------------------|--------|----|----------------|--------------| | `headers` | One or more (comma-separated) header names to drop. | string | | non-empty list | medium | ## Predicates Transformations can be configured with *predicates* so that the transformation is applied only to records which satisfy a condition. You can use predicates in a transformation chain and, when combined with the [Kafka Connect Filter (Kafka) SMT Usage Reference for Confluent Cloud](filter-ak.md#ak-filter), predicates can conditionally filter out specific records. For details and examples, see [Predicates](filter-ak.md#predicates).