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Kustomize Helper

by WebF1

The Kubernetes kustomize helper

Kustomize Helper

Kustomize Helper is a free, privacy-first tool for DevOps engineers, SREs, and developers. Build a kustomization.yaml from a guided form, inspect and validate existing manifests, and generate base/overlay folder structures. No cluster access. No uploads. No account. No tracking. Your manifests stay on your device.

No cluster accessLocal onlyNo adsNo accountNo tracking

Available Kustomize tools

Kustomization Builder

Build a kustomization.yaml from a guided form: resources, namePrefix, commonLabels, images, configMapGenerator, secretGenerator, and patches.

Open tool

Manifest Inspector

Paste or upload YAML and inspect multi-document manifests locally. Identifies kinds and warns about missing names, latest tags, and missing resource limits.

Open tool

Overlay Generator

Generate base and overlay (Dev, Staging, Prod) folder structures with a tree preview and per-environment YAML downloads.

Open tool

Why a private Kustomize tool?

Kubernetes manifests often reference internal service names, image registries, namespaces, and configuration that reveal architecture details. Web-based tools that upload your YAML add avoidable risk: the manifests leave your device and land on someone else's server.Kustomize Helper runs the entire pipeline in your browser, so the YAML never travels anywhere. It is a practical utility for quick, trustworthy configuration work without the compliance overhead of an upload-based tool.

How it works

  1. Pick a tool: Kustomization Builder, Manifest Inspector, or Overlay Generator.
  2. Load a sample, paste YAML, or upload a file. Everything stays in your browser.
  3. Edit the structured form or inspect the parsed documents.
  4. Preview the output, then copy or download the generated YAML.

Read more in the how it works guide, the Kustomize vs Helm comparison, or the privacy page.

Frequently asked questions

Does Kustomize Helper need cluster access?
No. The tool runs entirely in your browser. It does not connect to a Kubernetes cluster, does not run kubectl, and does not require credentials.
Is my YAML uploaded anywhere?
No. Parsing, building, inspection, and overlay generation all happen in your browser. Your manifests never leave your device.
Can I download the generated kustomization.yaml?
Yes. Every tool can copy output to the clipboard or download it as a YAML file. The Overlay Generator can download all files at once or individually.