YAML Formatter Online – Format & Beautify YAML Files

What is YAML?

YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files, data exchange, and DevOps automation. Unlike JSON, YAML uses indentation to represent structure, making it easier to read but sensitive to formatting errors.

This YAML file formatter is designed for developers who want the best YAML formatter experience without installing plugins. It works similarly to popular tools like the VSCode YAML formatter or IntelliJ YAML formatter, but runs fully online.

Our online YAML formatter helps you quickly format, validate, and beautify YAML files—no installation required.

What Does This Tool Do?

This YAML formatter is a free online tool that formats, validates, and beautifies YAML files directly in your browser. It fixes indentation errors, corrects spacing issues, and produces clean, readable YAML output. Use it to format YAML online without downloading any software.

Who Should Use This Tool?

DevOps engineers, backend developers, and system administrators who work with configuration files. This is the best alternative to VSCode YAML formatter extensions when you need quick access from any device. It supports Kubernetes manifests, Docker Compose files, CI/CD pipelines, and Ansible playbooks.

When Should You Use a YAML Formatter?

Use this YAML beautifier when you need to clean up messy YAML files, validate syntax before deployment, convert between YAML and JSON, or apply consistent indentation. The YAML pretty print feature ensures your configuration files are readable and properly structured.

Unlike desktop tools like the VSCode YAML formatter, Online YAML formatter works entirely online with no installation required, making it ideal for quick formatting and validation tasks.

YAML Formatter Comparison

How does this tool compare to other YAML formatting options?

YAML Formatting Examples

Here are common YAML structures you can format with our tool:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
  labels:
    app: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    spec:
      containers:
        - name: app
          image: my-app:latest
          ports:
            - containerPort: 8080

version: '3.8'
services:
  web:
    build: .
    ports:
      - "3000:3000"
    environment:
      - NODE_ENV=production
    depends_on:
      - db
  db:
    image: postgres:14
    volumes:
      - db-data:/var/lib/postgresql/data
volumes:
  db-data:

name: CI Pipeline
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Setup Node.js
        uses: actions/setup-node@v3
        with:
          node-version: '18'
      - run: npm install
      - run: npm test

---
- name: Deploy Web Application
  hosts: webservers
  become: true
  vars:
    app_version: "2.0.0"
    deploy_user: deploy
  tasks:
    - name: Install dependencies
      apt:
        name: ""
        state: present
      loop:
        - nginx
        - nodejs
        - npm

    - name: Deploy application
      git:
        repo: https://github.com/org/app.git
        dest: /var/www/app
        version: ""
      notify: Restart nginx

  handlers:
    - name: Restart nginx
      service:
        name: nginx
        state: restarted

replicaCount: 3

image:
  repository: myapp
  tag: latest
  pullPolicy: IfNotPresent

service:
  type: ClusterIP
  port: 80

ingress:
  enabled: true
  annotations:
    kubernetes.io/ingress.class: nginx
  hosts:
    - host: myapp.example.com
      paths:
        - path: /
          pathType: Prefix

resources:
  limits:
    cpu: 500m
    memory: 256Mi
  requests:
    cpu: 100m
    memory: 128Mi

# terraform.tf converted to YAML format
terraform:
  required_version: ">= 1.0"
  required_providers:
    aws:
      source: hashicorp/aws
      version: "~> 5.0"

provider:
  aws:
    region: us-east-1
    default_tags:
      tags:
        Environment: production
        Project: myapp

Features

Common Use Cases

• Kubernetes – Use this Kubernetes YAML formatter to format deployment manifests, ConfigMaps, Services, and Ingress configurations
• Ansible – Use this Ansible YAML formatter to clean up playbooks, roles, inventory files, and variable definitions
• Docker Compose – Use this Docker Compose YAML formatter to beautify docker-compose.yml files for multi-container applications
• CI/CD Pipelines – Format GitHub Actions, GitLab CI, CircleCI, and Jenkins configurations
• OpenAPI/Swagger – Validate and format API specification files
• Application Configs – Clean up Spring Boot, Rails, and other framework configurations

FAQ

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