---
title: "Introduction"
manual: "kreXX Debugger"
version: "main"
permalink: "https://docs.typo3.org/permalink/brainworxx/includekrexx:introduction@main"
source: "Introduction/Index.rst"
modified: "2026-09-17T06:18:56+00:00"
---

# Introduction

kreXX is a simple drop-in replacement for the fluid debugger `<f:debug/>`.

Since it is based on the PHP debugger kreXX you can use it also as a PHP debugger.

-   [What does it do?](https://docs.typo3.org/permalink/brainworxx/includekrexx:what-does-it-do@main)
-   [Logging](https://docs.typo3.org/permalink/brainworxx/includekrexx:logging-1@main)
-   [Backend settings](https://docs.typo3.org/permalink/brainworxx/includekrexx:backend-settings@main)
-   [kreXX vs includekrexx](https://docs.typo3.org/permalink/brainworxx/includekrexx:krexx-vs-includekrexx@main)