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YAML Formatter

Format and normalize YAML files with consistent 2-space indentation and clean structure.

100% Client-Side Local Execution
Input Data
1 2 3 4 5
Transformed Result
Path:JSON
{
"name": "myapp",
"version": "1.0.0",
"dependencies":{
"react": "^18.0.0",
"vite": "^5.0.0"
}
}

What is YAML Formatter?

The YAML formatter reflows YAML documents into consistent indentation and spacing, helping clean up config files that have been hand-edited with inconsistent indent widths or mixed styles. It's a standard yaml formatter for DevOps config work — Kubernetes, Ansible, CI pipelines — where consistent indentation is both a readability and correctness concern.

Technical Execution

The tool parses the input YAML into its structural representation using a YAML-compliant parser, then re-serializes it with a consistent, configurable indent width, normalizing spacing around keys, list items, and nested mappings.

Zero Data Storage Guarantee

Formatting runs entirely in your browser, so configuration files containing secrets, environment-specific values, or internal hostnames are never transmitted to a server.

How to Use YAML Formatter (Step-by-Step Guide)

  1. Paste your YAML document with inconsistent indentation
  2. The reformatted, consistently indented output appears automatically
  3. Choose your preferred indent width if the option is available
  4. Copy the cleaned-up YAML to your clipboard
  5. Download it as a .yaml or .yml file if needed

Frequently Asked Questions (FAQ)

Q: Is YAML formatter the same as YAML beautifier?
A: Yes, both terms describe reflowing YAML into consistent, readable indentation; we support both phrasings since users search for either.
Q: Will formatting fix a syntax error in my YAML?
A: No, since the document must already parse correctly to be reformatted; if there's a genuine syntax error, you'll see that reported instead of formatted output.
Q: Can I format YAML online for CI/CD config files?
A: Yes, this works well for GitHub Actions workflows, GitLab CI configs, Kubernetes manifests, and similar YAML-based pipeline definitions.
Q: Does it change tabs to spaces automatically?
A: Since valid YAML can't use tabs for indentation structure in the first place, the formatter works from already-valid YAML and outputs consistent space-based indentation.
Q: Is there a size limit for formatting YAML documents?
A: No hard limit, though very large files may take a bit longer since parsing happens in the browser.
Q: Does it preserve comments in the YAML?
A: Yes, comments (lines starting with #) are preserved during reformatting, though their exact alignment may shift slightly with the new indentation.
Q: Can I use a custom indent width like 4 spaces?
A: Yes, common indent widths are supported so you can match your project's established style.
Q: Does formatting affect YAML anchors and aliases?
A: No, anchor (&) and alias (*) references are preserved and continue to point to the same nodes after reformatting.
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