Beautify YAML configs, convert between YAML and JSON, compare files, and validate syntax. Perfect for Kubernetes, Docker Compose, and CI/CD workflows.
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YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files. Unlike JSON, YAML uses indentation for structure, supports comments, and is designed for easy reading and writing by humans.
YAML has become the de-facto standard for DevOps configuration. It's used in Kubernetes manifests,Docker Compose files, GitHub Actions workflows, Ansible playbooks,GitLab CI pipelines, and countless other tools. Understanding YAML is essential for modern infrastructure and deployment workflows.
# This is a comment
apiVersion: v1
kind: Service
metadata:
name: my-service
labels:
app: web
spec:
ports:
- port: 80
targetPort: 8080
selector:
app: webDeployments, Services, ConfigMaps, Secrets, Ingress, and all K8s resource definitions use YAML.
Multi-container Docker applications, service definitions, networks, and volumes.
GitHub Actions, GitLab CI, CircleCI, Azure Pipelines, and other workflow definitions.
YAML is a superset of JSON—any valid JSON is also valid YAML. However, YAML offers additional features that make it better suited for configuration files.
| Feature | YAML | JSON |
|---|---|---|
| Readability | More human-readable | Less readable (brackets, quotes) |
| Comments | Supported (#) | Not supported |
| Multi-document | Supported (--- separator) | Not supported |
| Anchors/Aliases | Supported (& and *) | Not supported |
| Quotes | Optional for most strings | Required for all strings |
| API Usage | Less common | Standard for REST APIs |
| Best For | Configuration files | Data exchange |
Ensure consistent indentation and formatting across your team's Kubernetes manifests and config files.
Find and fix YAML parsing errors with clear error messages and line numbers before deployment.
Convert between YAML and JSON when APIs require different formats or for debugging complex structures.
Compare YAML files to review config changes before deploying to production environments.
YAML configuration files often contain sensitive information: database credentials, API keys, encryption secrets, cloud provider tokens, and infrastructure details. Using a server-based YAML formatter means potentially exposing this data to third parties.
Our formatter runs 100% in your browser. Your Kubernetes secrets, Docker credentials, and CI/CD tokens never leave your device. You can verify this by checking your browser's Network tab or even use the tool offline after loading.