diff --git a/README.md b/README.md
new file mode 100644
index 0000000..29f47c7
--- /dev/null
+++ b/README.md
@@ -0,0 +1,33 @@
+# Static Dir Simplifier
+
+Optimize directories for size by combining identical files using hard links.
+
+## Options
+
+Usage: `simplify_static_dir` **[OPTIONS]** **[DIR]...**
+
+| Option | Meaning
+| - | -
+| -f                | Print a sum of the number of freed bytes.
+| -m **REGEX**      | Only match file paths matching **REGEX**.
+| -M **REGEX**      | Exclude file paths matching **REGEX**.
+| -v                | Verbose output.
+| -z                | Include zero-length files in search. Normally they are ignored (you don't save diskspace by hard-linking empty files).
+| --help            | Output this help message and exit.
+| --version         | Output version information and exit.
+
+By default, scans the current directory.
+
+## License
+
+Copyright (C) 2010-2022 Dan Church.
+
+License GPLv3: GNU GPL version 3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
+
+with Commons Clause 1.0 (https://commonsclause.com/).
+
+This is free software: you are free to change and redistribute it.
+
+There is NO WARRANTY, to the extent permitted by law.
+
+You may NOT use this software for commercial purposes.