diff --git a/images/headers/index_conversion_test/300-orig.jpg b/images/headers/index_conversion_test/300-orig.jpg
new file mode 100644
index 0000000..9bd167a
Binary files /dev/null and b/images/headers/index_conversion_test/300-orig.jpg differ
diff --git a/images/headers/index_conversion_test/300.avif b/images/headers/index_conversion_test/300.avif
new file mode 100644
index 0000000..3d8f64a
Binary files /dev/null and b/images/headers/index_conversion_test/300.avif differ
diff --git a/images/headers/index_conversion_test/300.jpg b/images/headers/index_conversion_test/300.jpg
new file mode 100644
index 0000000..9d7d9ec
Binary files /dev/null and b/images/headers/index_conversion_test/300.jpg differ
diff --git a/images/headers/index_conversion_test/300.jxl b/images/headers/index_conversion_test/300.jxl
new file mode 100644
index 0000000..1f72789
Binary files /dev/null and b/images/headers/index_conversion_test/300.jxl differ
diff --git a/images/headers/index_conversion_test/300.webp b/images/headers/index_conversion_test/300.webp
new file mode 100644
index 0000000..de7ac79
Binary files /dev/null and b/images/headers/index_conversion_test/300.webp differ
diff --git a/images/headers/index_conversion_test/readme.txt b/images/headers/index_conversion_test/readme.txt
new file mode 100644
index 0000000..13c59bc
--- /dev/null
+++ b/images/headers/index_conversion_test/readme.txt
@@ -0,0 +1,6 @@
+Ideal quality for coffee image:
+
+WEBP: 65
+JXL: 85
+JPG: 85
+AVIF: 36
diff --git a/images/logo/short-40.jxl b/images/logo/short-40.jxl
index c10f5a4..b708ffe 100644
Binary files a/images/logo/short-40.jxl and b/images/logo/short-40.jxl differ