Unity How To Change File Name In All Files

Walter Cronk

2 min read

·

02-04-2025

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Changing filenames en masse within a Unity project can be a tedious task if done manually. This guide offers efficient methods to streamline the process, saving you valuable time and preventing potential errors. We'll cover both scripting solutions and external tools, catering to various skill levels and project needs.

Understanding the Need for Bulk Renaming in Unity

Often, you might need to rename files within your Unity project for various reasons:

• Consistency: Maintaining a consistent naming convention across assets improves project organization and readability.
• Version Control: Renaming files after updates or revisions helps keep track of changes and simplifies collaboration.
• Integration: Specific pipelines or tools may require assets to follow a particular naming structure.
• Error Correction: Fixing naming errors that occurred during asset import or creation.

Method 1: Using a Custom C# Script (Recommended)

This approach offers the most control and flexibility. A custom script allows you to specify exact renaming rules, targeting specific file types or folders.

Step-by-Step Guide:

1. Create a new C# script: In your Unity project, create a new C# script (e.g., RenameFiles.cs).

2. Write the script: Paste the following code into your script. This example adds a prefix to all .png files within a specified folder:

using UnityEngine;
using System.IO;

public class RenameFiles : MonoBehaviour
{
    public string targetFolderPath = "Assets/Textures"; // Change this to your folder path
    public string prefix = "New_"; //Change the prefix as needed

    public void Rename()
    {
        if (!Directory.Exists(targetFolderPath))
        {
            Debug.LogError("Target folder not found!");
            return;
        }

        string[] files = Directory.GetFiles(targetFolderPath, "*.png"); //Modify the file type as needed

        foreach (string file in files)
        {
            string newFileName = Path.Combine(targetFolderPath, prefix + Path.GetFileName(file));
            File.Move(file, newFileName);
            Debug.Log("Renamed: " + file + " to " + newFileName);
        }
    }
}

3. Assign variables: In the Unity editor, attach the script to a GameObject. Modify the targetFolderPath and prefix variables in the Inspector to match your requirements.

4. Run the script: Call the Rename() function either by attaching a button to the script or manually invoking it from the editor console.

Important Considerations:

• Backup: Always back up your project before running any bulk renaming script. Errors can lead to data loss.
• Testing: Test your script on a small subset of files before running it on the entire project.
• Error Handling: The provided script includes basic error handling. Enhance it to include more robust checks and logging for better reliability.
• File Types: Modify the Directory.GetFiles() method's second argument (e.g., ".jpg", ".fbx") to target specific file types.

Method 2: Using External Tools

Several external file renaming tools are available. These tools often provide a user-friendly interface with advanced features like regular expression support. However, remember that using external tools requires careful consideration of your project structure to avoid unintended consequences.

Note: This section avoids specific tool recommendations to remain unbiased and avoid endorsement. A quick search online for "bulk file renamer" will yield many options.

Remember to always back up your project before using any bulk renaming method. Choose the method that best suits your skills and project requirements. Careful planning and testing are crucial for a smooth and successful renaming process.