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YAML Formatter

YAML formatter tool. Enter YAML data using either text input or file upload, and get formatted YAML. Supports files up to 100KB in size.

YAML Data (Text Input)
Result
Read Only

How to use

About this tool

Formats YAML and normalizes indentation and structure.

How to use

Enter YAML or load from file; view and copy the formatted output.

Use cases

• Kubernetes manifests • CI config • Ansible playbooks • Docker Compose formatting

How it works

■ What is YAML? YAML (YAML Ain't Markup Language) is a human-readable config format that uses indentation for hierarchy. Colons separate keys from values; hyphens denote lists. Widely used in Kubernetes manifests, CI/CD (e.g. GitHub Actions), Docker Compose, Ansible, etc.

FAQ

Q: What does the YAML formatter do exactly?
A: It parses your YAML, normalizes indentation and structure, and re-outputs a clean, consistent document. It also reports syntax errors such as incorrect indentation or invalid characters.
Q: Will formatting change the meaning of my YAML?
A: No. The tool normalizes whitespace and indentation but preserves all keys, values, and data types. The semantics of your YAML remain unchanged.
Q: What are common YAML syntax errors to watch for?
A: Incorrect indentation (YAML is indent-sensitive), mixing tabs and spaces, missing colons after keys, and unquoted strings containing special characters (: # { } [ ] , & * ?) are the most frequent issues.
Q: Can I use this for Kubernetes manifests or GitHub Actions workflows?
A: Yes. Any valid YAML file is supported, including Kubernetes manifests, Docker Compose files, GitHub Actions/CircleCI workflows, and Ansible playbooks.
Q: Does this tool send my YAML to a server?
A: No. All parsing and formatting is done in the browser. Your data is never sent to any server.