ffee All tools
EN 中文 FR DE

Dockerfile Generator

Build a clean starter Dockerfile for your language, port and start command.

Build a Dockerfile

Instructions: 0
Base image: —
The output is a starting point: check image tags and package names against your own project before building.

How to use the Dockerfile Generator

  1. Choose your language and the base image variant you want to start from.
  2. Set the port, the start command and whether to run as a non-root user.
  3. Click Build Dockerfile, then copy the text or download the file.

Features

Advertisement

More tools

Barcode Generator vCard Generator iCal Generator Htpasswd Generator RSA Key Generator API Key Generator License Key Generator Gitignore Generator EditorConfig Generator SQL Table Generator Regex Generator CSS Variable Generator

Frequently Asked Questions

Common questions about the free online dockerfile generator.

Pick your language, base image, port and start command, then click Build Dockerfile. Copy the result into a file named Dockerfile.
Node, Python, Go, Java and a static site recipe that serves files with nginx. Each one has its own package install and start steps.
A non-root user limits the damage if the process is compromised. The generated user line creates a small account and switches to it.
Docker and orchestrators use it to check whether the container is still serving traffic, and to restart it when the check keeps failing.
Alpine gives the smallest image but uses musl libc, which can break native modules. Slim Debian images are larger and more compatible.
Copying package files before the source code lets Docker cache the dependency layer, so rebuilds are much faster when only code changes.
Yes. Keep it in the repository next to the source so the image can be rebuilt and reviewed alongside the code it packages.
No. The Dockerfile is assembled from the form values in your browser and nothing is sent to a server.
Run docker build -t my-app . in the folder that holds the Dockerfile, then start it with docker run -p followed by your port mapping.
The output is a single stage starter. For smaller production images, split the build and runtime steps into two FROM stages by hand.

Last updated: October 10, 2026