YAML Formatter

Format YAML files — Docker Compose, Kubernetes manifests, GitHub Actions and more — with consistent indentation, catching syntax errors.

What is the YAML Formatter?

YAML is a human-friendly configuration format where indentation defines structure, so small mistakes break files.

How does it work?

Prettier’s YAML parser validates the document and re-prints it with consistent indentation and spacing.

Example

Inconsistently indented services are normalised to two spaces per level.

Frequently asked questions

Is my data sent to a server?

No. This tool runs entirely in your browser; nothing you paste is uploaded or stored.

Can YAML use tabs?

No. YAML indentation must use spaces.

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