YAML Validator
Validate YAML documents and find syntax errors.
About YAML Validator
The YAML Validator checks your configuration files for indentation errors, invalid characters, and structural mistakes. YAML relies heavily on exact spacing, making this tool essential for preventing CI/CD pipeline failures.
How to Use
Real-World Examples
Fixing Indentation Errors
YAML is extremely strict about spaces. Mixing tabs and spaces or using incorrect indentation levels will cause parsing failures.
server: port: 8080 database: postgres
server: port: 8080 database: postgres
Best Practices
- Always use exactly 2 spaces for indentation.
- Quote string values that contain special characters like `:`, `{`, or `[` to prevent them from being evaluated as YAML structures.
Common Errors
Tab characters used for indentation
Configure your editor to always use spaces (typically 2 spaces) instead of tabs.
Missing space after colon
Always leave exactly one space after a colon in key-value pairs (e.g., `key: value`).
Frequently Asked Questions
Does this support YAML 1.2?
Yes, our parser fully complies with the YAML 1.2 specification.
Is my data secure?
Absolutely. All processing is done locally in your browser. Your data is never sent to our servers.
Security & Privacy
Validation is performed locally using a secure JS parser that disables arbitrary code execution. Your secrets and configuration files are never transmitted.