diff --git a/justfile b/justfile
new file mode 100644
index 00000000..45ee0481
--- /dev/null
+++ b/justfile
@@ -0,0 +1,14 @@
+default:
+  @just --list
+
+# lint rb files with rubocop
+lint:
+  bundle exec rubocop
+
+# run image_optim from repo
+run *ARGS:
+  ruby -Ilib bin/image_optim {{ARGS}}
+
+# rspec tests
+test:
+  bundle exec rspec