Validatoree YAML

About YAML Validator

Validate your YAML documents instantly with our free online YAML validator. Check syntax, detect errors with line numbers, and ensure your YAML is well-formed. Perfect for developers working with Docker Compose, Kubernetes manifests, GitHub Actions, Ansible playbooks, and CI/CD configurations. All processing happens client-side — your data never leaves your device.

Features

• Pure Client-Side: No data sent to any server. Your YAML stays private.
• File Upload & Drag-Drop: Upload .yaml, .yml, or .txt files directly.
• Detailed Error Messages: Clear error messages with exact line numbers when validation fails.
• Document Statistics: See key count, arrays, objects, and document size at a glance.
• One-Click Actions: Copy validation report to clipboard or download as a text file.
• YAML 1.2 Support: Handles anchors, aliases, and all standard YAML types.

How to Use

1. Paste your YAML into the input area, or drag & drop a file.
2. Click Validate YAML.
3. Review the validation result — green for valid, red for errors.
4. Copy or download the validation report if needed.

Common Use Cases

• CI/CD Configs: Validate GitHub Actions, GitLab CI, or Docker Compose YAML before deployment.
• Kubernetes: Check K8s manifest YAML for syntax errors before applying.
• Ansible: Ensure playbook YAML is well-formed before running.
• API Specs: Validate OpenAPI/Swagger YAML definitions.

FAQ

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