Fix indentation errors and improve the readability of your configuration files with our free online YAML formatter. Quickly clean up complex YAML structures to ensure they are valid and easy for your team to manage.
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Best Practice
Always use 2 spaces for YAML indentation, as it is the most widely accepted standard in the DevOps community.
Did You Know?
YAML is a superset of JSON, meaning any valid JSON file is technically also a valid YAML file.
YAML (YAML Ain't Markup Language) is a human-friendly data serialization standard commonly used for configuration files and data exchange. It is the industry standard for cloud-native tools like Kubernetes, Docker, and GitHub Actions due to its readability. Because YAML relies strictly on indentation for its structure, proper formatting is not just an aesthetic choice—it is a requirement for the file to function correctly.
Tip
Use '---' at the beginning of your file to explicitly signal the start of a YAML document.
To maintain high code quality, developers often use the Prettier extension in VS Code or CLI tools like yamllint. Integrating these into your CI/CD pipeline ensures that no malformed YAML reaches your production environment. Our online tool is perfect for quick fixes, debugging specific snippets, or verifying formatting logic before committing changes to your repository.
Q: Why does my YAML fail when I use tabs? A: The official YAML specification prohibits the use of tabs for indentation; you must use spaces to define the structure.
Q: Is my configuration data safe? A: Yes, Codemata processes the formatting locally in your browser. Your configuration data is never sent to our servers.
Q: Does this tool validate YAML syntax too? A: While this tool focuses on beautifying, it will fail to format if the syntax is fundamentally broken, helping you spot errors.
Q: Can I format Kubernetes manifests with this? A: Absolutely. This formatter is ideal for Kubernetes, Docker Compose, and CI/CD configuration files.
Best Practice
Never use tabs in YAML files; most parsers will throw a 'found character that cannot start any token' error.