# Processors

Processors are components that modify, transform, or enhance data as it flows through Fluent Bit. Unlike [filters](/manual/4.0/data-pipeline/filters.md), processors are tightly coupled to inputs, which means they execute immediately and avoid creating a performance bottleneck.

Additionally, filters can be implemented in a way that mimics the behavior of processors, but processors can't be implemented in a way that mimics filters.

{% hint style="info" %}
Only [YAML configuration files](/manual/4.0/administration/configuring-fluent-bit/yaml.md) support processors.
{% endhint %}

## Available processors

Fluent Bit offers the following processors:

* [Content modifier](/manual/4.0/data-pipeline/processors/content-modifier.md): Manipulate the content, metadata, and attributes of logs and traces.
* [Labels](/manual/4.0/data-pipeline/processors/labels.md): Add, update, or delete metric labels.
* [Metrics selector](/manual/4.0/data-pipeline/processors/metrics-selector.md): Choose which metrics to keep or discard.
* [OpenTelemetry envelope](/manual/4.0/data-pipeline/processors/opentelemetry-envelope.md): Transform logs into an OpenTelemetry-compatible format.
* [Sampling](/manual/4.0/data-pipeline/processors/sampling.md): Apply head or tail sampling to incoming traces.
* [SQL](/manual/4.0/data-pipeline/processors/sql.md): Use SQL queries to extract log content.
* [Filters as processors](/manual/4.0/data-pipeline/filters.md): Use filters as processors.

## Features

Compatible processors include the following features:

* [Conditional processing](/manual/4.0/data-pipeline/processors/conditional-processing.md): Selectively apply processors to logs based on the value of fields that those logs contain.


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