Kubernetes Pod Spec Builder
Visually build Kubernetes YAML manifests with a form-based UI. Configure containers, resources, probes, volumes, and more.
About This Tool
The Kubernetes Pod Spec Builder is a free browser-based tool that generates valid Kubernetes YAML manifests through an intuitive form-based interface. Instead of writing YAML by hand and worrying about indentation errors, you fill in fields for your resource kind (Pod, Deployment, StatefulSet, or DaemonSet), metadata, containers, environment variables, resource limits, probes, volumes, and scheduling constraints, and the tool generates properly formatted YAML in real time.
The builder supports all the most commonly used Pod specification fields including multiple containers (sidecars), multiple port mappings, configMap and secret volume mounts, persistent volume claims, liveness and readiness probes (HTTP GET, TCP socket, and exec), node selectors, and tolerations. Common templates for Nginx, Node.js, Redis, and PostgreSQL are included to give you a head start.
If you need to validate your YAML syntax, the YAML Formatter can check for structural errors. For building Docker commands to test containers locally, try the Docker Run Command Builder. And if you are converting between JSON and YAML configurations, the JSON to YAML Converter handles that seamlessly.
All processing runs entirely in your browser. Your Kubernetes manifests — including any secrets, passwords, or internal hostnames — are never sent to any server, making this tool safe to use with production configurations.
How to Use
- Select a Kind (Pod, Deployment, StatefulSet, or DaemonSet) from the dropdown. The API version updates automatically.
- Enter the resource Name and Namespace in the Basic Settings section.
- Add Labels as key-value pairs. These are used for pod selection in Deployments.
- Configure your Container — set the image, ports, environment variables, resource requests/limits, and probes.
- Add Volumes if needed (emptyDir, hostPath, configMap, secret, or PVC) and reference them in container volume mounts.
- Optionally configure Node Selectors and Tolerations for scheduling constraints.
- The YAML output updates in real time on the right panel. Click Copy or press Ctrl+Shift+C to copy, or click Download to save as a .yaml file.
Popular Kubernetes Manifest Examples
FAQ
What Kubernetes resource types are supported?
The builder supports Pod, Deployment, StatefulSet, and DaemonSet. For Pods, apiVersion is set to v1; for Deployment, StatefulSet, and DaemonSet, it uses apps/v1. The generated YAML follows the official Kubernetes API specification for each resource type.
Can I add multiple containers (sidecars)?
Yes. Click 'Add Container' to add additional containers to your pod spec. Each container has its own image, ports, environment variables, resource limits, volume mounts, and probe configuration. This is useful for sidecar patterns like log forwarders, service meshes, or metric collectors.
How do I configure health checks?
Each container supports both liveness and readiness probes. Enable them with the checkbox, then choose the probe type: HTTP GET (path + port), TCP Socket (port), or Exec (command). Set the initial delay and period in seconds. Liveness probes restart the container on failure; readiness probes remove it from service endpoints.
What volume types are available?
The builder supports emptyDir (temporary storage), hostPath (node filesystem), configMap (configuration data), secret (sensitive data), and persistentVolumeClaim (PVC for durable storage). Add a volume in the Volumes section, then reference it by name in a container's volume mounts.
Can I use templates as a starting point?
Yes. Four pre-built templates are available: Nginx Web Server, Node.js Application, Redis Cache, and PostgreSQL Database. Click a template to populate all fields, then customize the values for your specific needs. Templates include appropriate resource limits, probes, and volume configurations.
Is my data safe?
Yes. All YAML generation runs entirely in your browser using JavaScript. No data is sent to any server. Your Kubernetes manifests, including secrets and passwords entered in environment variables, never leave your machine. You can verify this by checking the Network tab in your browser's developer tools.
Does the tool validate the generated YAML?
The tool generates syntactically correct YAML based on your inputs. However, it does not validate against the full Kubernetes API schema — for example, it won't check if a container image exists or if resource values are in valid formats. Use kubectl apply --dry-run=client or a dedicated Kubernetes manifest validator for full schema validation.
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