diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000000000000000000000000000000000000..818d3cf342652e9c9a56f9d94551c198720357c4
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,14 @@
+root = true
+
+[*]
+charset=utf-8
+end_of_line=lf
+indent_size=4
+indent_style=tab
+insert_final_newline=true
+trim_trailing_whitespace=true
+
+[*.txtar]
+indent_size=2
+indent_style=space
+
diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000000000000000000000000000000000000..6f952299270eed506a1dd30028ab8e0f1be7ef7f
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,2 @@
+# To prevent CRLF breakages on Windows for fragile files, like testdata.
+* -text