# Kafka Connect DropHeaders SMT Usage Reference for Confluent Platform The DropHeaders SMT (`org.apache.kafka.connect.transforms.DropHeaders`) removes one or more specified headers from each Apache Kafka® record. ## Description The DropHeaders SMT drops one or more headers from each record. To insert a header into records, see [InsertHeader SMT](insertheader.md#insertheader). ## Properties | Name | Description | Type | Valid values | Importance | |-----------|-------------------------------------------------------------|--------|---------------------------------------|--------------| | `headers` | One or more comma-separated header names to drop. Required. | list | non-empty list of unique header names | high | ## Example This example 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: Records include headers `app.id` and `txn.id`. After: Records do not include headers `app.id` and `txn.id`. ## Predicates Configure transformations with predicates to ensure they process only records that satisfy a particular condition. You can also use predicates in a transformation chain with the [Kafka Connect Filter (Kafka) SMT Usage Reference for Confluent Platform](filter-ak.md#ak-filter) to conditionally filter specific records. For more information, see [Predicates](filter-ak.md#predicates).