How to use the YAML Formatter / Beautifier
Format your YAML in three steps:
1
Paste your YAML
Paste YAML with any indentation inconsistencies — mixed spaces, inconsistent levels, or irregular key spacing — into the input box. Upload a .yaml or .yml file if preferred.
2
Choose indentation
Select 2 or 4 spaces using the indent toggle. The formatter detects the original indentation structure and remaps it to your chosen size.
3
Format and copy
Click Format YAML to apply normalised indentation, consistent key: value spacing, and cleaned blank lines. Copy the output or download as a .yaml file.
When to use this tool
Use the YAML formatter to clean and standardise YAML configuration files:
- →Normalising Kubernetes manifest files with inconsistent indentation before applying with kubectl
- →Cleaning up Docker Compose files shared between team members with different editor settings
- →Standardising GitHub Actions workflow YAML before committing to a repository
- →Formatting Ansible playbooks and inventory files for consistent readability across a team
- →Fixing YAML exported from GUI tools that uses inconsistent or incorrect indentation levels
- →Reformatting Helm chart values.yaml and templates after manual edits introduced irregularities
- →Cleaning up application config YAML (Spring Boot, Rails, Django) before code review
Frequently asked questions
Q:Does the YAML formatter validate my YAML?
The formatter normalises indentation and spacing using structural detection rather than a full YAML parser. This means it will clean syntactically correct YAML and improve readability, but it may also reformat slightly invalid YAML without flagging errors. For strict YAML validation, run the output through a dedicated YAML validator after formatting.
Q:Will it work with YAML anchors (&) and aliases (*)?
YAML anchors and aliases are handled as regular text tokens and are preserved in the output. The formatter does not resolve or expand anchors — it leaves the anchor and alias syntax intact in its original position with corrected indentation.
Q:Can it format multi-document YAML files (separated by ---)?
The formatter processes the document as a whole text file. Document separators (---) are preserved as encountered. Each document section is indented consistently, though for complex multi-document files, review the output to confirm the separator positions are correct.
Q:Is this safe for Kubernetes and Helm YAML?
Yes — the formatter only adjusts whitespace (indentation and spacing around colons) and never alters key names, values, or document structure. Kubernetes and Helm are sensitive to indentation errors, so normalising to a consistent 2-space indent actually reduces the risk of indentation-related deployment failures.
Q:What is the difference between YAML formatting and YAML linting?
Formatting fixes whitespace and aesthetic consistency — indentation, spacing, blank lines — without checking semantic correctness. Linting checks for rule violations such as duplicate keys, incorrect types, use of tabs instead of spaces, or values that don't match a schema. This tool formats; for schema-level linting of Kubernetes manifests use kubeval or yamllint.
Q:Does the formatter handle YAML with long block scalars (| and >) correctly?
Block scalar indicators (| for literal block and > for folded block) and their content are preserved during formatting. The indentation of the scalar content itself is not modified, as YAML block scalar indentation is relative and functionally significant — only surrounding element indentation is normalised.