diff --git a/validator.rb b/validator.rb
new file mode 100644
index 0000000000000000000000000000000000000000..5c009ba8dc37169144eafc7e9b349426ab9d4ab3
--- /dev/null
+++ b/validator.rb
@@ -0,0 +1,13 @@
+require 'yaml'
+
+# run `ruby validator.rb` in current directory
+
+Dir.children('projects').each do |folder|
+  begin
+    path = "projects/#{folder}/imports.yml"
+    YAML.load(File.read(path)) if File.exists?(path)
+  rescue => exception
+    puts "#{exception}"
+    puts "Format wrong with projects/#{folder}/imports.yml"
+  end
+end
\ No newline at end of file