DevOps Generators

Dockerfile Linter

All tools

Score Dockerfiles for security and layer best practices - no daemon needed. - runs entirely in your browser. Free, fast and private.

How it works

Four simple steps

1

Paste a Dockerfile

Drop your build file into the editor - no Docker daemon needed.

2

Run best-practice checks

Catch latest tags, secrets in ARG/ENV, and root USER issues.

3

Review severities

Each finding includes a suggested fix and severity level.

4

Copy the report

Share the scorecard in a PR or hardening checklist.

Dockerfile Linter

About Dockerfile Linter

Dockerfile Linter is a free devops generators utility on OneDevToolkit. Score Dockerfiles for security and layer best practices - no daemon needed. It runs in your browser for this session - use the workspace on this page to try it.

Need a related step? Open the DevOps Generators hub at /devops-tools/ or the <a href="/blog/">blog</a> for longer workflows.

Features

Lightning fast

Processes data instantly with no server round-trips.

100% private

Your data never leaves your browser. Nothing is uploaded.

No installation

Works in any modern browser. Nothing to download or install.

Free forever

No limits, no sign-up, no credit card required.

Cross-platform

Works on desktop, tablet and mobile devices.

Dark & light mode

Beautiful in both themes. Your preference is saved.

Keyboard shortcut

Ctrl Enter - Run tool

Use cases

Everyday private work

Open Dockerfile Linter when you need a quick result without uploading data to a third-party site.

On any modern browser

No install required - bookmark the tool and return anytime.

Privacy-first by default

Client-side processing keeps inputs on your device for core OneDevToolkit tools.

Instructions

How to use this tool

FAQ

Frequently asked questions

See all FAQs

Answers for this tool. For site-wide help, open the FAQ hub.

Dockerfile Linter score dockerfiles for security and layer best practices - no daemon needed. Output stays in your browser for quick iteration.

Prefer redacted samples. Even with local processing, treat prod credentials carefully and rotate anything accidentally shared.

No. Generators and linters produce text for you to copy into Git, CI, or consoles - they do not deploy for you.

Always run official CLIs (kubectl, terraform plan, actionlint, etc.) on the final files after using Dockerfile Linter as a starting point.

Syntax may vary across Kubernetes/Terraform/GitHub Actions versions. Adjust generated snippets to your runtime version.

After the page loads, most authors work offline. Keep a local copy of critical manifests.

Commit reviewed files to Git rather than sharing long-lived links with secrets in query strings.

Use Sample to learn the format, edit, then Download/Copy into your editor.

Request it via Contact with the platform and version you use.

View more FAQs

Related tools

View all

Kubernetes Manifest Studio

Generate Deployment, Service, and Ingress YAML with a drift checklist.

Open

K8s Inspector

Summarize Kubernetes YAML kinds, names, and labels.

Open

K8s Resource Diff

Diff two Kubernetes manifests locally.

Open

K8s Manifest Splitter

Split multi-document YAML into one file per resource.

Open

Explore 321 free tools

Everything you need as a developer, marketer or creator - in one beautiful place.

Browse all tools