YAML Formatter — Pretty-Print and Beautify YAML Online
YAML Formatter
Clean up messy YAML. Normalizes indentation, expands inline arrays and objects.
#What this tool does
Paste messy YAML — mixed indentation, inline syntax, inconsistent spacing — and get clean, diff-friendly output. The formatter normalizes indentation (2 or 4 spaces), expands inline {key: val} and [a, b] into block form, and validates syntax during formatting. Multi-document files (---) are handled correctly.
All formatting runs client-side in your browser. Nothing is sent to a server.
#2-space vs 4-space
2-space is the standard for Kubernetes, Docker Compose, GitHub Actions, and Helm. 4-space appears in some Ansible playbooks. Pick one for your team and enforce it — this formatter makes the conversion instant.
#Related tools
Validate syntax with the YAML validator, or convert between formats with YAML to JSON and JSON to YAML. For API specs, try the OpenAPI validator.
#Open source
This tool is powered by @azin-tech/mini-tools, an open-source developer toolkit. View source on GitHub.
Auto-deploy into your own cloud
Push code, AZIN handles the rest. Auto-detected builds, your cloud account, no vendor lock-in.