Easily clean up messy configuration files with our free online YAML formatter. This tool instantly corrects indentation issues and improves the readability of your YAML data with customizable formatting options.
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Best Practice
Always use spaces for indentation in YAML. The YAML spec explicitly forbids tabs for indenting nodes.
Did You Know?
YAML is a superset of JSON, which means any valid JSON file is also a valid YAML file.
YAML (YAML Ain't Markup Language) is a human-readable data serialization standard used primarily for configuration files. Unlike JSON or XML, it relies on indentation to define structure, making it clean and concise but also sensitive to formatting errors. It is the industry standard for tools like Kubernetes, Docker, and various CI/CD pipelines. Proper formatting is essential because a single misplaced space can change the entire logic of your infrastructure-as-code.
Tip
Use a 2-space indentation standard for maximum compatibility with Kubernetes and Docker configurations.
For local development, it is highly recommended to use editor extensions like the YAML plugin for VS Code or the Red Hat YAML extension. You can also integrate tools like prettier or yamllint into your pre-commit hooks or CI/CD pipelines. This ensures that every configuration file committed to your repository adheres to the team's style guide and is free of syntax errors before deployment.
Q: Does this tool validate my YAML syntax? A: Yes, the formatter checks for structural validity and will highlight errors if the YAML structure is broken or invalid.
Q: Should I use tabs or spaces for YAML? A: You should always use spaces. The YAML specification does not allow tabs for indentation because they are handled inconsistently across different environments.
Q: Can I format Kubernetes files here? A: Absolutely! This tool is ideal for formatting Kubernetes manifests, Docker Compose files, and GitHub Actions workflows.