diff --git a/.local/bin/fixnames b/.local/bin/fixnames
new file mode 100644
index 00000000..13ac6ed9
--- /dev/null
+++ b/.local/bin/fixnames
@@ -0,0 +1,18 @@
+#!/bin/dash
+
+[ "$(id -u)" = "0" ] && echo "This script should not be run as root" >&2 && exit 1
+
+find . -depth \( -path '*/.*' -o -path '*/.*/*' \) -prune -o \( -type f -o -type d \) -print0 | xargs -0 -P 0 -I {} dash -c '
+
+base="${1##*/}"
+path="${1%/*}"
+
+pattern="s/[^a-zA-Z0-9 ._-]//g; s/[ .-]/_/g; s/_+/_/g; s/^_+//; s/_+$//; s/[A-Z]/\L&/g"
+
+[ -f "$1" ] && pattern="$pattern; s/_([^_]+)$/.\\1/"
+
+new_name="$(echo "$base" | sed -E "$pattern")"
+
+[ "$base" != "$new_name" ] && [ -e "$path/$new_name" ] && new_name="${$}_${new_name}"
+[ "$base" != "$new_name" ] && mv "$1" "$path/$new_name"
+' _ {}