diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..30f26f2
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,23 @@
+# make         Generate index.html from index.bs
+# make lint    Check index.bs for warnings and errors
+# make watch   Regenerate index.html after any change to index.bs
+
+LOCAL_BIKESHED := $(shell command -v bikeshed 2> /dev/null)
+
+index.html: index.bs
+ifndef LOCAL_BIKESHED
+	curl https://api.csswg.org/bikeshed/ -f -F file=@$< >$@;
+else
+	bikeshed spec
+endif
+
+ifdef LOCAL_BIKESHED
+.PHONY: lint watch
+
+lint: index.bs
+	bikeshed --print=plain --dry-run --force spec --line-numbers $<
+
+watch: index.bs
+	@echo 'Browse to file://${PWD}/index.html'
+	bikeshed --print=plain watch $<
+endif  # LOCAL_BIKESHED