YAML Validator and Formatter
Format and validate your YAML code with our online tool. Paste your YAML or upload a file to quickly beautify or check for errors.
What Is YAML File
YAML is a data serialization format that is easy for humans to read. Mostly used for configuration files, data sharing, and documentation. Unlike JSON or XML, it relies on indentation and a straightforward syntax without the need for brackets or quotes.
YAML supports complex data structures including nested objects, arrays, multi-line strings, and comments. It uses colons, hyphens, relies on consistent indentation and file extension is .yml or .yaml.
Many tools choose YAML over JSON for configuration due to its clarity, comment support, and reduced syntax complexity.
Why You Need To Validate YAML
YAML validation is important because syntax errors can cause app failures or deployment issues. Indentation-based structure makes it particularly sensitive to spacing errors, tab-space mixing, and more.
YAML validator detects problems such as improper indentation, missing colons, invalid characters. Validation is critical in DevOps environments because YAML controls infrastructure, deployments, and automation.