This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
razor12911 identified a critical bottleneck: Traditional compression methods treat a game as one monolithic block of data. This makes extraction slow and patching nearly impossible. Between 2015 and 2018, razor12911 began releasing experimental tools— xz-utils , ztool , and eventually the xTool library .
This article explores what XTool is, the core mechanisms of how it works, and why it is a staple in high-end compression workflows. What is XTool by Razor12911?
During installation, the script runs the decode command to restore the original proprietary compression so the game can read it. ⚠️ Essential Tips xtool library by razor12911 work
While older tools like Precomp, Fairytale, and FreeArc pioneered similar concepts, XTool was built from the ground up with . It is written primarily in Pascal (94.2%), with small portions in C++, JavaScript, and HTML. The project is released under the MIT License , making it free to use, modify, and distribute.
xtool.exe pre -m[codec] -t[threads] [input_file] [output_file]
The XTool library, developed by Razor12911, is a popular and versatile software tool used for a wide range of applications. The library has gained significant attention in recent years due to its ease of use, flexibility, and extensive feature set. In this article, we will provide a comprehensive overview of the XTool library, its features, and its applications, as well as explore the work of its creator, Razor12911. This public link is valid for 7 days
Most large game files (like textures and audio) are already compressed using standard formats (e.g., Zstd, Oodle, or Deflate). Standard compression tools cannot shrink these files further because they are already "packed."
When a standard archiving tool (like 7-Zip or WinRAR) attempts to compress already-compressed game files, it hits a wall. Compressed data looks entirely randomized to a standard compression algorithm. Because there are no visible patterns, repeating strings, or redundant blocks left to exploit, the resulting archive remains roughly the same size as the original file. The Solution: How XTool works
Rather than compressing files directly into a smaller archive like 7-Zip or WinRAR, XTool operates as a . It scans game archives (such as .rpf , .pak , or .bin files) to locate data streams that have already been compressed by the game engine using standard formats like Zlib, Deflate, Oodle, or LZ4. XTool temporarily inflates (decompresses) these streams back into their raw, predictable states. When standard compression tools are subsequently applied to this raw data, they can achieve a radically higher compression ratio. How XTool Works: The Precompression Pipeline Can’t copy the link right now
It often beats standard lzma2 by 5-20% on game assets, allowing 100GB games to be shrunk to 40-50GB.
XTool acts as a "preprocessor" before final compression. In the world of game repacking—such as those from FitGirl Repacks—it identifies compressed streams within game files, decompresses them temporarily, and then lets a final high-ratio compressor (like or LOLZ ) pack them more tightly than originally possible. Development & Standalone Use
Developers and repackers use the xtool GitHub repository to access a suite of advanced features: