Debug Function Library

Just2Devs - Code Plugins - Apr 10, 2022

The Debug Function Library introduces new debug nodes and makes debugging easier to manage across your project.

  • Supported Platforms
  • Supported Engine Versions
    4.27, 5.0 - 5.2
  • Download Type
    Engine Plugin
    This product contains a code plugin, complete with pre-built binaries and all its source code that integrates with Unreal Engine, which can be installed to an engine version of your choice then enabled on a per-project basis.


The Debug Function Library introduces new debug nodes as well as new in-editor tools to manage debugging across your project. Using the plugin you can easily control blueprints debugging by turning it on and off with a single click. The plugin also allows to control debugging more granularly by letting you turn on and off print, log and draw debug for each blueprint.

The plugin adds a new print node which allows you to change the print state (print & log, print, log), change the print level (message, warning, error), print formatted strings (automatically adds wildcard pins), override the debug properties duration, run the print node on tick (automatically sets duration) and enable/disable the node.

The Debug Function Library also adds new draw debug nodes, all the new draw nodes allow you to run the node on tick (automatically sets duration), override the debug properties duration and override all the debug properties.

The Debug Function Library works in C++ and brings over one hundred new C++ macros for debugging. The new C++ macros will allow you to manage print & log, log and draw debug in C++ plus offer a much shorter and more readable syntax than the built-in macros or draw functions.

Using the new blueprint context menu actions you will be able to select blueprints from the content browser and enable/disable debug, print, log and draw debug on all the selected blueprints.

Using the new blueprint toolbar actions you will be able to bulk select DFL debug nodes by common properties/states and perform bulk operations on them.

Technical Details


  • Debug Properties struct that allows you to control per actor debugging
  • Custom Print Node (change print state, change print level, format print string, override duration, run on tick)
  • Custom Draw Nodes (run on tick, override duration, override all debug properties)
  • Blueprint Context Menu Actions to enable/disable all debugging, print, log and draw debug
  • Blueprint Toolbar Actions to bulk select and edit DFL debug nodes

Code Modules:

  •  DebugFunctionLibrary
  •  DebugFunctionLibraryEditor
  •  DebugFunctionLibraryUncooked

Number of Blueprints: 0

Number of C++ Classes: 28

Network Replicated: No

Supported Development Platforms: Windows

Supported Target Build Platforms: Windows, Android

Documentation: link

Example Project: link