YAML Formatter Online
Paste your YAML to format, validate, or convert it to JSON instantly. Consistent indentation, syntax checking, and clean output — all processed locally in your browser.
Common YAML Use Cases
Kubernetes
Deployment, Service, ConfigMap manifests
Docker Compose
Multi-container orchestration configs
GitHub Actions
CI/CD workflow definitions
Helm Charts
Kubernetes package values files
Ansible
Infrastructure automation playbooks
OpenAPI / Swagger
API specification documents
What is YAML?
YAML (YAML Ain't Markup Language) is a human-friendly data serialization format widely used for configuration files, CI/CD pipelines, Kubernetes manifests, and Docker Compose files. Its indentation-based syntax is cleaner than JSON but more error-prone.
A YAML formatter normalizes indentation, fixes inconsistent spacing, and catches common mistakes like tab characters or duplicate keys. For configuration files shared across teams, consistent formatting reduces review friction and merge conflicts.
YAML vs JSON
YAML is more readable for complex nested structures and supports comments. JSON is stricter but universally parsed. Use the JSON Formatter after converting, or click "To JSON" to switch formats directly.