Kubernetes YAML Validator — K8s Manifest Schema & Security Audit
Validate Kubernetes YAML manifests for syntax errors and required field completeness. Checks Deployments, Services, Ingress, ConfigMaps, Secrets, PVCs, HPAs, CronJobs, and more — with per-document results and fix hints.
How to Use Kubernetes YAML Validator — K8s Manifest Schema & Security Audit
How to Use the Kubernetes Manifest Validator
Step 1: Paste Your YAML Manifest
Copy your Kubernetes manifest (or multiple manifests separated by ---) and paste it into the input area. The validator uses js-yaml to parse the YAML before applying schema checks.
Step 2: Review Per-Document Results
Each document in the manifest gets its own result card showing the resource kind, name, and apiVersion. The card header shows a compact badge count (e.g. 2e 1w) for errors and warnings at a glance.
Step 3: Expand Issues for Hints
Click any issue row (those with a ▼ indicator) to expand a detailed hint explaining what is wrong and how to fix it.
Step 4: Try the Example Manifests
Use the example buttons to see validation in action:
- Broken Deployment — missing labels, mismatched selector, :latest image, no resource limits
- Service + Ingress — multi-document YAML with both a Service and Ingress in one file
- Production Deployment — best-practice manifest with probes, resource limits, and security context
Checks Performed
| Severity | Check | What It Catches |
|---|---|---|
| Error | Missing apiVersion | Required field absent |
| Error | Missing kind | Resource type not specified |
| Error | Missing metadata.name | Resource has no name |
| Error | Missing spec | Required spec section absent |
| Error | Selector/label mismatch | matchLabels does not match template labels |
| Error | Missing containers | Pod spec has no containers |
| Error | Missing container image | Container has no image defined |
| Error | Bad Service type | Invalid ClusterIP/NodePort/LoadBalancer value |
| Error | Missing Ingress pathType | pathType absent or invalid |
| Warning | Unpinned image tag | :latest or no tag on container image |
| Warning | No resource limits | Missing resources.limits.cpu/memory |
| Warning | Privileged container | securityContext.privileged: true |
| Warning | Bad metadata.name format | Name does not match DNS subdomain rules |
| Info | No probes defined | Missing livenessProbe or readinessProbe |
| Info | No securityContext | Container has no security context |
| Info | NodePort service | Prefer LoadBalancer or Ingress in production |
| Info | Headless service | No selector on Service |
Frequently Asked Questions
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