Kubernetes YAML Validator
Validate Kubernetes manifests in your browser: required fields per kind, apiVersion pairing, tab indentation, and YAML syntax errors with per-line diagnostics.
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What is Kubernetes YAML Validator?
Kubernetes YAML Validator parses pasted manifests with js-yaml and applies built-in rules for 13 common resource kinds: required fields, apiVersion/kind pairing warnings, tab-indentation detection, and YAML syntax errors - each reported with a line number and severity, entirely in your browser.
Key Benefits
- Catch kubectl apply failures before they reach the cluster
- Tabs are flagged by line, ending the most common YAML mystery
- Multi-document manifests validated document by document
- Per-kind required-field rules encode real Kubernetes expectations
- Manifests stay on your device - nothing is sent anywhere
Common Use Cases
- •Pre-flight checking manifests before deploying to production
- •Learning Kubernetes resource structure with immediate feedback
- •Reviewing pull requests that add or change manifests
- •Debugging why a manifest from a tutorial fails to apply
How to Validate a Kubernetes Manifest
- Paste the manifest: Paste a single manifest or a multi-document file separated by --- lines.
- Read the diagnostics: Each finding shows its line: YAML syntax, tabs, missing kind/apiVersion, or absent required fields.
- Fix and re-check: Correct the reported lines until the validator reports no issues, then apply with kubectl.
Key Features
- Built-in required-field rules for 13 common resource kinds
- Multi-document support for --- separated manifest files
- Tab-indentation detection with exact line numbers
- apiVersion/kind pairing warnings for uncommon combinations
- Per-line, severity-coded diagnostics with error counts
- 100% in-browser - manifests never leave your device