Skin Validator

Skin Validator is a Java-based tool designed to provide a simple and efficient alternative to the Bedrock Explorer Skin Assistance tool. This application checks the integrity and validity of skin files, ensuring that they meet specific criteria before use.

Warning

• Before starting, rename the skin file with the ending corresponding to the arm width and desired resolution:

• For 16x16 skins: Use the ending _a for 3px arm (Alex version) or _s for 4px arm (Steve version).
• For 32x32 skins: Use the ending _a32 for 6px arm (Alex HD version) or _s32 for 8px arm (Steve HD version).

If the skin file does not have any of these endings, it will automatically be considered a 16x16 skin with a 4px arm (Steve version).

Face map

• When a face is irregular, the code indicates the name of the face that is wrong. To know which face it is, this is the face map.
  

Features

• Pixel Validation: Checks individual pixels for correctness.
• Transparency Check: Checks whether transparency is fully opaque or fully transparent, avoiding unexpected results.
• Face Validation: Checks if each face has all pixels the same color.

Usage

java -cp out\production\FSkinValidate skinvalidator.Main <file-or-folder> [--fix] [--recursive]

• --fix: creates a corrected copy prefixed with ✓, fixing only forbidden pixels and partial alpha pixels.
• --recursive: when the input is a folder, scans PNG files in subfolders too.

Requirements

• Java 22 or higher

Build

javac -encoding UTF-8 -d out\production\FSkinValidate <all .java files under src>