YAML Syntax Validator & Linter

Validate YAML syntax, detect indentation errors, and locate parser issues instantly.

How It Works & Processing Standards

Validate YAML syntax, detect indentation errors, and locate parser issues instantly.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Desktop max file size: 50MB
  • Mobile max file size: 20MB

YAML Syntax Validator & Linter is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use YAML Syntax Validator & Linter

  1. 1
    Paste YAMLPaste YAML text into the validation editor.
  2. 2
    ValidateRun syntax checks to verify YAML compliance.
  3. 3
    View DiagnosticsSee detailed error lines, columns, and explanations if any issue exists.

Examples

Valid YAML
Input: name: pinkale version: 1.0 enabled: true
Result: Valid YAML: Parsing completed with 0 errors.

Common Use Cases

  • Pre-commit validation of Docker Compose and Kubernetes configurations
  • Catching invisible tab characters in CI/CD pipeline definition files
  • Validating CloudFormation and Serverless framework manifests

Frequently Asked Questions (FAQ)

Why does YAML fail when using tab characters?

YAML requires space indentation. The validator automatically detects tabs and flags them with line locations.

Have feedback or ideas for this tool? Suggest & Inquire →