.. _connect_transforms_supported:

|kconnect-long| Transformations
===============================

Single Message Transformations (SMTs) are applied to messages as they flow
through |kconnect|. SMTs transform inbound messages after a source connector has
produced them, but before they are written to |ak|. SMTs transform outbound
messages before they are sent to a sink connector. The following SMTs are available for use with |kconnect-long|.

.. toctree::
    :hidden:

    cast
    drop
    extractfield
    extracttopic
    filter
    flatten
    hoistfield
    insertfield
    maskfield
    messagetimestamprouter
    regexrouter
    replacefield
    setschemametadata
    timestampconverter
    timestamprouter
    tombstonehandler
    valuetokey
    custom
    
.. note::
   
   If none of the available SMTs provide the necessary transformation, you can create your own. See :ref:`custom-transform` for more information.
   
.. tip::
  
  For a tutorial and a deep dive into this topic, see `How to Use Single Message Transforms in Kafka Connect <https://www.confluent.io/blog/kafka-connect-single-message-transformation-tutorial-with-examples/>`__.

.. include:: ../includes/transforms-list.rst