diff --git a/bin/build-favicons b/bin/build-favicons
new file mode 100755
index 0000000..df43ce6
--- /dev/null
+++ b/bin/build-favicons
@@ -0,0 +1,11 @@
+#!/bin/sh
+
+sizes="16x16 32x32 48x48 64x64 128x128 256x256"
+for size in ${sizes}; do
+  convert src/favicon.svg \
+          -gravity center \
+          -resize ${size} \
+          -background transparent \
+          -extent ${size} \
+          src/favicon-${size}.png
+done