diff --git a/appPublic/base64_to_file.py b/appPublic/base64_to_file.py
new file mode 100644
index 0000000..67f1254
--- /dev/null
+++ b/appPublic/base64_to_file.py
@@ -0,0 +1,65 @@
+import os
+import base64
+from appPuyblic.uniqueID import getID
+
+function getFileExtensionFromBase64(base64String) {
+    // Extract MIME type from data URL
+    const mimeType = base64String.match(/data:([a-zA-Z0-9]+\/[a-zA-Z0-9-.+]+).*,.*/);
+
+    if (mimeType && mimeType[1]) {
+        const mime = mimeType[1];
+        const mimeToExtension = {
+			# 图片
+			"image/jpeg": "jpg",
+			"image/png": "png",
+			"image/gif": "gif",
+			"image/webp": "webp",
+			"image/bmp": "bmp",
+			"image/svg+xml": "svg",
+			"image/x-icon": "ico",
+			"image/tiff": "tiff",
+
+			# 音频
+			"audio/mpeg": "mp3",
+			"audio/wav": "wav",
+			"audio/ogg": "ogg",
+			"audio/webm": "weba",
+			"audio/aac": "aac",
+			"audio/flac": "flac",
+			"audio/mp4": "m4a",
+			"audio/3gpp": "3gp",
+
+			# 视频
+			"video/mp4": "mp4",
+			"video/webm": "webm",
+			"video/ogg": "ogv",
+			"video/x-msvideo": "avi",
+			"video/quicktime": "mov",
+			"video/x-matroska": "mkv",
+			"video/3gpp": "3gp",
+			"video/x-flv": "flv",
+		};
+
+        return mimeToExtension.get(mime, '');
+    }
+
+    return '';
+}
+def base64_to_file(base64_string, output_path):
+    # Remove data URL prefix if present (e.g., "data:image/png;base64,")
+    if ',' in base64_string:
+        header, base64_data = base64_string.split(',', 1)
+    else:
+        base64_data = base64_string
+
+    # Decode Base64 string
+    binary_data = base64.b64decode(base64_data)
+    
+    # Write binary data to file
+	name = getID()
+	ext = getFileExtensionFromBase64(base64_string)
+	fname = f'{name}{ext}'
+	fp = os.path.join(output_path, fname)
+    with open(fp, 'wb') as file:
+        file.write(binary_data)
+