YAML Formatter

Format YAML and toggle between YAML / JSON — runs in your browser.

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YAML is the configuration language of choice for Kubernetes, GitHub Actions, Docker Compose, and almost every modern build system. Converterzilla's YAML formatter parses your YAML, normalises indentation to two spaces, and lets you toggle to JSON view with one click. Validation errors point to the exact line of the offending token. All processing is local — paste a Kubernetes manifest without worrying about leaking secrets to a third-party server.

How to use YAML Formatter in your browser

  1. Paste YAML. Drop a .yaml or .yml file, or paste content directly.
  2. Pick output mode. Format-as-YAML (default) or convert to JSON.
  3. Copy or download. Buttons under the output handle both.

Why use Converterzilla for YAML Formatter

js-yaml powered

Same parser the majority of Node.js tooling uses — predictable, well-tested, YAML 1.2 compliant.

Anchor / alias support

Preserves YAML's reference features when round-tripping back to YAML.

Local only

Pasting infrastructure secrets into an online formatter is risky; this one runs in your browser.

Frequently asked questions about YAML Formatter

Yes — js-yaml's default schema is YAML 1.2 with the CORE subset.

JSON has no anchor syntax; we materialise the alias into its referenced value.

Standard tags (!!str, !!int, !!float, !!bool, !!null, !!seq, !!map) are honoured. Custom tags fall back to a string.

Further reading and references

Guides for YAML Formatter

YAML vs JSON: picking the right format for config files

Both formats can represent the same data. The real difference is who's going to read and edit the file by hand.

Related browser-based tools

JSON Formatter

Format the JSON output.

JSON to XML

Convert JSON to XML.

JSON Validator

Validate the converted JSON.