Ansible Playbook Validator

Paste an Ansible playbook or task file and catch the structural mistakes that break a run before ansible-playbook even reaches a host — YAML errors, plays missing hosts, and tasks that call no module (or more than one). It runs entirely in your browser.

Ansible playbook input

Results

Results appear here as you type.

100% private — validation runs entirely in your browser. Your input is never uploaded.

- name: Configure web servers
  hosts: web
  become: true
  tasks:
    - name: Install nginx
      ansible.builtin.package:
        name: nginx
        state: present

    - name: Deploy config
      ansible.builtin.template:
        src: nginx.conf.j2
        dest: /etc/nginx/nginx.conf
      notify: Reload nginx

  handlers:
    - name: Reload nginx
      ansible.builtin.service:
        name: nginx
        state: reloaded

What it checks

• YAML syntax with line/column.
• Play structure: each play needs hosts and tasks/roles.
• Task validity: exactly one module per task; flags zero or multiple.
• Misindented keys that escaped the tasks: block.
• Idempotency hints: shell/command without creates/changed_when; unnamed tasks.

A structural check — for deep linting also run ansible-lint and ansible-playbook --syntax-check.

Ansible Playbook Validator

What it checks

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