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Thanks everyone. I also have revised this script to not work with a background layer, but rather just ensure the canvas color was set to white. Just also sharing so we all have options

[CODE=javascript]// Open folder selection dialog

var inputFolder = Folder.selectDialog("Select a folder with images");

// Check if a valid folder was selected

if (inputFolder) {

    var files = inputFolder.getFiles(/\.(jpg|jpeg|png|tif|tiff|psd)$/i);

   

    for (var i = 0; i < files.length; i++) {

        var file = files[i];

        if (file instanceof File) {

            open(file);

            // Get the active document

            var doc = app.activeDocument;

            // Get original width and height

            var originalWidth = doc.width;

            var originalHeight = doc.height;

            // Determine the new canvas size (largest dimension)

            var newSize = Math.max(originalWidth, originalHeight);

            // Resize the canvas to make it square (Photoshop will fill the empty space with the current background color)

            doc.resizeCanvas(newSize, newSize, AnchorPosition.MIDDLECENTER);

            // Save the modified image

            var saveFile = new File(file.path + "/" + file.name);

            var saveOptions = new JPEGSaveOptions();

            saveOptions.quality = 12; // Max quality

            doc.saveAs(saveFile, saveOptions, true, Extension.LOWERCASE);

            // Close the document without saving additional changes

            doc.close(SaveOptions.DONOTSAVECHANGES);

        }

    }

   

    alert("Batch processing completed!");

} else {

    alert("No folder selected. Process canceled.");

}

[/CODE]