How it works

How it works

Kustomize Helper is a privacy-first Kubernetes manifest and kustomization tool. Every step, from import through export, runs locally in your browser. There is no backend that receives your YAML and no database that stores it. The tool never connects to a cluster.

1. 1. Kustomization Builder

   Fill in a structured form for resources, namespace, namePrefix, nameSuffix, commonLabels, commonAnnotations, images, configMapGenerator, secretGenerator, and patches. The builder validates names against RFC 1123 and DNS subdomain rules and renders a live kustomization.yaml preview. Copy or download the result. The form state lives only in memory in your browser tab.

2. 2. Manifest Inspector

   Paste or upload a multi-document YAML file. The inspector parses each document with a safe YAML parser, identifies apiVersion, kind, name, and namespace, and surfaces common problems: missing metadata.name, container images tagged latest or missing a tag, and workloads without resource requests and limits. Kustomization resources get a dedicated references panel. No network request is made with your YAML content.

3. 3. Overlay Generator

   Define a base and toggle Dev, Staging, and Prod overlays. Each environment can set replicas, namespace, namePrefix, an image tag override, and an inline strategic merge patch. The generator renders a directory tree preview and per-file YAML. Download all files as a single YAML stream or download each file individually. The wizard state never leaves your browser.

4. 4. Preview and export

   Every tool shows a live preview of the generated YAML. Copy the output to the clipboard or download it as a YAML file. Start over clears the in-memory state. Nothing is written to local storage by default.

What never happens

• Your YAML content is never transmitted to a backend.
• No connection is made to a Kubernetes cluster.
• No kubectl command is run on your behalf.
• No YAML content is written to local storage by default.
• No third-party tracking, advertising, or session recording runs on the page.

Read the full privacy page or try a tool: