diff --git a/mdttool/README.md b/mdttool/README.md
new file mode 100644
index 0000000..e51c9a1
--- /dev/null
+++ b/mdttool/README.md
@@ -0,0 +1,19 @@
+# mdttool.py
+Python3 script for unpack/pack MDT file format. Allow to edit texts files extracted. MIT License.
+
+## User manual
+Unpack **source_mdt.mdt** in the default new folder _source_mdt_.
+If optional_dest_folder is specified we unpack in _optional_dest_folder_.
+Charset has to be specified when unpacking.
+```
+mdttool.py --unpack source_mdt.mdt optional_dest_folder --charset EU
+```
+Pack **source_folder** in the default new file _source_folder.mdt_. If optional_dest_file.mdt is specified we pack in _optional_dest_file.mdt_.
+```
+mdttool.py --pack source_folder optional_dest_file.mdt
+
+## Extracted file tree
+In the unpacked folder we find:
+* 0_N.txt - Correspond to the paragraphs block N with N starting from 0.
+* conf.txt - Used for a correct repack. Don't edit this file.
+* charset.tpl - The extracted TPL containing symbols textures.