diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..e0acda8
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,16 @@
+# Records the formatting conventions the tracked files already follow.
+# https://editorconfig.org
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+
+# trim_trailing_whitespace is scoped to Java rather than applied to every file
+# because LICENSE has trailing whitespace on three lines. insert_final_newline
+# is deliberately left unset: the .java sources end without a final newline
+# while README.md, LICENSE, and .gitignore end with one.
+[*.java]
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true