diff --git a/.gitattributes b/.gitattributes
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,45 @@
+# Non human-editable files are binary
+
+**.dsp  -text
+**.dsw  -text
+**.mk   -text
+**.sln  -text
+**.vcproj  -text
+**.vsprops -text
+
+**.aif  -text
+**.aifc -text
+**.aiff -text
+**.au   -text
+**.bmp  -text
+**.db   -text
+**.exe  -text
+**.icns -text
+**.gif  -text
+**.ico  -text
+**.info -text
+**.jpg  -text
+**.pck  -text
+**.png  -text
+**.psd  -text
+**.tar  -text
+**.wav  -text
+**.whl  -text
+**.xar  -text
+**.zip  -text
+
+Lib/test/cjkencodings/* -text
+Lib/test/decimaltestdata/*.decTest -text
+Lib/test/sndhdrdata/sndhdr.* -text
+Lib/test/test_email/data/msg_26.txt -text
+Lib/test/xmltestdata/* -text
+
+Lib/venv/scripts/nt/* -text
+
+Lib/test/coding20731.py -text
+
+# Windows batch files work best with CRLF, there can be subtle problems with LF
+**.bat eol=crlf
+
+# The Windows readme is likely to be read in Notepad, so make it readable
+PCbuild/readme.txt eol=crlf