YAML Formatter & Validator
Validate and normalize common YAML configuration without uploading it.
Supports ordinary indentation-based mappings, lists and scalar values. Anchors, tags, block scalars and multi-document streams are outside this local parser.
Validate common YAML configuration
This focused parser covers the structures commonly used in small configuration files and identifies indentation or mapping errors.
Advanced YAML is a large specification; use an application-specific parser when anchors, custom tags or complex scalar rules matter.
How to use the YAML Formatter & Validator
- Provide the complete value or source material you want to inspect.
- Run the check and review each result or warning.
- Correct the original source and repeat the check before using it.
Practical example
Use a small known sample first so you can compare the output before processing a larger value.
What this tool cannot guarantee
The result reflects the supplied input and browser implementation; project-specific syntax and runtime behavior still require testing.
Continue this workflow with the JSON Formatter & Validator
Frequently asked questions
Is the YAML Formatter & Validator free to use?
Yes. It is available without an account or paid subscription.
Is my input uploaded or stored?
The core operation runs in your browser. Avoid pasting secrets into any web page unless the individual tool explicitly explains how the data is handled.
Should I review the result before using it?
Yes. Check the output for your project and test it in the intended environment before production use.