dnutils

About #

dnutils is a set of command-line tools I wrote to help with modding and reverse engineering the game Dragon Nest. I used to rely on a mix of different tools — some outdated, others scattered across various sources — and wanted to consolidate everything into a single, fast, and reliable CLI tool.

That led me to build my own utilities in Rust, focused on speed and ease of use. The tools handle tasks like unpacking assets, inspecting game files, and converting formats commonly used in the game.

This project also became a great way to deepen my Rust skills — especially around binary parsing, CLI design, and performance tuning. I still occasionally use it when revisiting old modding ideas or helping others in the DN modding community.

Tools #

dnpak-create #

Creates a .pak file from a directory.

Usage: dnpak-create <input_directory> [output_file]

• input_directory: The directory to pack.
• output_file: Optional name for the output .pak file. Defaults to <input_directory>.pak.

dnpak-unpack #

Unpacks a .pak file.

Usage: dnpak-unpack <input_file> [output_directory]

• input_file: The .pak file to unpack.
• output_directory: Optional directory to unpack to. Defaults to a folder named after the .pak file.

dnpak-find #

Searches for files within a .pak file.

Usage: dnpak-find <input_file> [query]

• input_file: The .pak file to search in.
• query: Optional filter string to search for matching filenames.

dnpak-patch #

Creates a patch from a .pak file. This tool includes a simple GUI to input the patch version.

Usage: dnpak-patch <input_file>

• input_file: The .pak file to create the patch from.

The tool will create a new directory named after the version number provided. It includes:

• A renamed .pak file: Patch<version>.pak
• A file list: Patch<version>.txt
• An MD5 checksum: Patch<version>.pak.md5
• Patch metadata: PatchInfoServer.cfg