Dockerfile Generator
Scaffold a clean Dockerfile in seconds.
How to use
- 1 Pick your application stack.
- 2 Set the base image version and exposed port (or leave the defaults).
- 3 Optionally enter a custom start command in exec form.
- 4 Toggle Alpine or a multi-stage build if you want a smaller image.
- 5 Copy the generated Dockerfile into your project root.
About Dockerfile Generator
The Dockerfile Generator scaffolds a clean, sensible Dockerfile for the most common application stacks so you do not have to remember the boilerplate every time you containerise a project.
Choose Node.js, Python, Go or a static site served by nginx, set the base image version and the port you want to expose, optionally override the start command, and the tool writes out a ready-to-use file you can drop straight into your repository.
The generated files follow current good practice rather than the bare minimum.
Dependency files are copied before the rest of the source so Docker’s layer cache is used efficiently, production installs skip dev dependencies, and the Node and Go builds offer an optional multi-stage mode that compiles in a full image but ships only the artefacts in a small runtime — distroless for Go, a slim production layer for Node.
Python builds set the usual unbuffered, no-bytecode environment, and you can flip every supported stack to an Alpine base for a smaller image with a single checkbox.
Everything is produced locally in your browser as plain text — there is no Docker daemon involved, nothing is uploaded, and there are no limits.
Tweak the options, copy the result, and adjust the COPY paths or commands to match your project’s layout before you build.
FAQ
What does the multi-stage option do?
For Node and Go it builds in a full image, then copies only the compiled output into a minimal runtime image, producing a much smaller and more secure final container.
Will the file work without changes?
It is a strong starting point, but check the COPY paths and start command match your project layout — for example your build output folder or entrypoint file.
Does it run Docker or upload my code?
No. It only generates Dockerfile text in your browser. No daemon is contacted and nothing you enter leaves the page.