YAML Validator & Parser
Validate YAML syntax online and inspect parsed JSON output with structural summary.
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YAML Input
Paste the YAML text you want to validate.
Parsed Output
After successful validation, the parsed JSON structure appears here.
Root Type
-
Top-Level Entries
0
Line Count
0
Byte Size
0
How to use
- Paste YAML text into the left editor.
- Click 'Validate YAML' to run syntax validation.
- If there is an error, the editor will try to highlight the failing line.
- After successful validation, the right side shows parsed JSON output.
- Use History to restore recently validated inputs.
Related Knowledge
YAML is widely used for configuration files, CI/CD pipelines, container orchestration and data exchange. It is readable, but highly sensitive to indentation and structure.
Why is YAML easy to break?
YAML uses indentation to express hierarchy. The number of spaces, list indentation and key alignment can all trigger parse failures. It is more format-sensitive than JSON.
Why show parsed JSON output?
Developers often care about the structure YAML will eventually produce. Seeing the parsed JSON makes it faster to verify nesting and field layout.
Key Features
- YAML syntax validation
- Error line highlighting
- Parsed JSON preview
- Structural summary metrics
Common Applications
- Check Docker Compose files
- Validate Kubernetes manifests
- Inspect CI/CD config structure
- Debug YAML indentation and list issues