diff --git a/Unix.yaml b/Unix.yaml
index bae4fd1..35aa729 100644
--- a/Unix.yaml
+++ b/Unix.yaml
@@ -13,6 +13,7 @@
     - role: curl
     - role: fzf
     - role: git
+    - role: tidy
     - role: tree
 
     - role: llvm
diff --git a/roles/tidy/tasks/Darwin.yaml b/roles/tidy/tasks/Darwin.yaml
new file mode 100644
index 0000000..a6f9fbe
--- /dev/null
+++ b/roles/tidy/tasks/Darwin.yaml
@@ -0,0 +1,5 @@
+---
+- name: install homebrew package
+  homebrew:
+    name: tidy-html5
+    state: latest
diff --git a/roles/tidy/tasks/Debian.yaml b/roles/tidy/tasks/Debian.yaml
new file mode 100644
index 0000000..bcf2c90
--- /dev/null
+++ b/roles/tidy/tasks/Debian.yaml
@@ -0,0 +1,5 @@
+---
+- name: install apt package
+  apt:
+    name: tidy
+    state: latest
diff --git a/roles/tidy/tasks/main.yaml b/roles/tidy/tasks/main.yaml
new file mode 100644
index 0000000..6853678
--- /dev/null
+++ b/roles/tidy/tasks/main.yaml
@@ -0,0 +1,2 @@
+---
+- include_tasks: '{{ansible_os_family}}.yaml'