> For the complete documentation index, see [llms.txt](https://docs.fluentbit.io/manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fluentbit.io/manual/2.0/readme.md).

# Fluent Bit v2.0 Documentation

High Performance Log and Metrics Processor

![](https://1190038539-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FKyjNJ8yMWrriBUgpXuBD%2Fuploads%2Fgit-blob-d4ccbc624c755eee10816bf9ca71a07be4096688%2Flogo_documentation_2.0.png?alt=media\&token=4bbfeee4-9135-40e3-8335-723c911390c9)

[Fluent Bit](http://fluentbit.io) is a Fast and Lightweight **Telemetry Agent** for Logs, Metrics, and Traces for Linux, macOS, Windows, and BSD family operating systems. It has been made with a strong focus on performance to allow the collection and processing of telemetry data from different sources without complexity.![](https://static.scarf.sh/a.png?x-pxid=71f0e011-761f-4c6f-9a89-38817887faae)

## Features

* High Performance: High throughput with low resources consumption
* Data Parsing
  * Convert your unstructured messages using our parsers: [JSON](/manual/2.0/pipeline/parsers/json.md), [Regex](/manual/2.0/pipeline/parsers/regular-expression.md), [LTSV](/manual/2.0/pipeline/parsers/ltsv.md) and [Logfmt](/manual/2.0/pipeline/parsers/logfmt.md)
* Metrics Support: Prometheus and OpenTelemetry compatible
* Reliability and Data Integrity
  * [Backpressure](/manual/2.0/administration/backpressure.md) Handling
  * [Data Buffering](/manual/2.0/administration/buffering-and-storage.md) in memory and file system
* Networking
  * Security: built-in TLS/SSL support
  * Asynchronous I/O
* Pluggable Architecture and [Extensibility](/manual/2.0/development/library_api.md): Inputs, Filters and Outputs
  * More than 100 built-in plugins are available
  * Extensibility
    * Write any input, filter or output plugin in C language
    * WASM: [WASM Filter Plugins](/manual/2.0/development/wasm-filter-plugins.md) or [WASM Input Plugins](/manual/2.0/development/wasm-input-plugins.md)
    * Bonus: write [Filters in Lua](/manual/2.0/pipeline/filters/lua.md) or [Output plugins in Golang](/manual/2.0/development/golang-output-plugins.md)
* [Monitoring](/manual/2.0/administration/monitoring.md): expose internal metrics over HTTP in JSON and [Prometheus](https://prometheus.io/) format
* [Stream Processing](/manual/2.0/stream-processing/introduction.md): Perform data selection and transformation using simple SQL queries
  * Create new streams of data using query results
  * Aggregation Windows
  * Data analysis and prediction: Timeseries forecasting
* Portable: runs on Linux, macOS, Windows and BSD systems

## Fluent Bit, Fluentd and CNCF

[Fluent Bit](http://fluentbit.io) is a [CNCF](https://cncf.io) **graduated** sub-project under the umbrella of [Fluentd](http://fluentd.org), it's licensed under the terms of the [Apache License v2.0](http://www.apache.org/licenses/LICENSE-2.0).

Fluent Bit was originally created by [Eduardo Silva](https://www.linkedin.com/in/edsiper/); as a CNCF-hosted project is a fully **vendor-neutral** and community-driven project.


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