From ZeldaMods (Breath of the Wild)
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Author(s) arbiter34
Source code
License Apache 2.0
Written in Java
Platform support Cross-platform

ninten-file-tool is an BYML tool. It can convert documents from BYML (or BYAML) to a human readable format (JSON) and vice versa.


  1. Install the Java runtime environment (JRE).
  2. Download the latest release from GitHub.

Known issues

  • Wii U only: Only works with big endian files and unable to handle Switch (little endian) documents.
  • Incomplete support for newer node types: Newer node types (0xd4, 0xd5, 0xd6, 0xff) are not supported. In practice, this is not an issue for Breath of the Wild as these are not known to be used in the game.