diff --git a/davtelepot/tools/__init__.py b/davtelepot/tools/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/davtelepot/tools/merge_files.py b/davtelepot/tools/merge_files.py
new file mode 100644
index 0000000..19247c1
--- /dev/null
+++ b/davtelepot/tools/merge_files.py
@@ -0,0 +1,66 @@
+"""Use this tool to merge davtelepot-split files.
+
+Documents larger than 50 MB are automatically split by `send_document` method
+    and can be merged with this tool.
+Example:
+python3 -m davtelepot.tools.merge_files my_file.pdf
+"""
+
+import argparse
+import glob
+import logging
+import os
+
+
+def merge_files(input_file_path, output_file_path):
+    input_directory = os.path.dirname(os.path.abspath(input_file_path))
+    input_file_name = os.path.basename(os.path.abspath(input_file_path))
+    if output_file_path:
+        output_directory = os.path.dirname(os.path.abspath(output_file_path))
+        output_file_name = os.path.basename(os.path.abspath(output_file_path))
+    else:
+        output_directory = input_directory
+        output_file_name = input_file_name + 'out'
+    with open(os.path.join(output_directory, output_file_name), 'wb') as output_file:
+        for file_name in sorted(glob.glob(os.path.join(input_directory, input_file_name) + '*')):
+            with open(file_name, 'rb') as input_file:
+                output_file.write(input_file.read())
+
+
+def main():
+    # noinspection SpellCheckingInspection
+    log_formatter = logging.Formatter(
+        "%(asctime)s [%(module)-15s %(levelname)-8s]     %(message)s",
+        style='%'
+    )
+    root_logger = logging.getLogger()
+    root_logger.setLevel(logging.DEBUG)
+
+    console_handler = logging.StreamHandler()
+    console_handler.setFormatter(log_formatter)
+    console_handler.setLevel(logging.DEBUG)
+    root_logger.addHandler(console_handler)
+
+    # Parse command-line arguments
+    cli_parser = argparse.ArgumentParser(description='Merge split files',
+                                         allow_abbrev=False)
+    cli_parser.add_argument('--input', '--file-path', '--path',
+                            '-i', '-f', '-p',
+                            type=str,
+                            required=True,
+                            help='Input file name (except ` - part n`)')
+    cli_parser.add_argument('--output', '--output-file-path', '--out',
+                            '-o',
+                            type=str,
+                            default=None,
+                            required=False,
+                            help='Output file name (defaults to input file name)')
+    cli_arguments = vars(cli_parser.parse_args())
+    input_file_path = cli_arguments['input']
+    output_file_path = cli_arguments['output']
+    merge_files(input_file_path=input_file_path,
+                output_file_path=output_file_path)
+
+
+if __name__ == '__main__':
+    main()