# Anonymizers

> Protect sensitive information in your LLM applications with Opik's Anonymizers, ensuring compliance and preventing accidental data exposure.

<Tip>
  Anonymizers are available in both **cloud** and **self-hosted** installations of Opik.
</Tip>

Anonymizers help you protect sensitive information in your LLM applications by automatically detecting and replacing personally identifiable information (PII) and other sensitive data before it's logged to Opik. This ensures compliance with privacy regulations and prevents accidental exposure of sensitive information in your trace data.

<Frame>
  <img src="https://files.buildwithfern.com/https://opik.docs.buildwithfern.com/docs/opik/2026-01-30T17:33:07.444Z/img/production/anonymizers_example.png" />
</Frame>