What is YAML Validator?
YAML Validator evaluates YAML file syntax against YAML 1.2 specifications, detecting indentation errors and malformed mappings.
How to use YAML Validator
Paste your YAML configuration into the input area. Click Validate YAML to check syntax and view exact error locations.
Key features
- Strict YAML 1.2 syntax validation
- Line-by-line error position detection
- 100% client-side operation
Common use cases
- Validating Kubernetes manifests and GitHub Actions workflows before commit
Technical details & standards
Executes YAML AST parsing client-side, reporting syntax errors instantly.
Frequently asked questions
Why does YAML disallow tab indents?
YAML specifications prohibit tabs because tab widths vary across text editors.
Is my data safe?
All processing happens entirely in your browser. Your data never leaves your device and is never sent to or stored on a server.
Does it work offline?
Yes. Once the page has loaded, most tools keep working without an internet connection.