Free online Dockerfile generator. Multi-language base images, multi-stage builds, health checks, and COPY instructions. Generate production-ready Dockerfiles instantly.
TL;DR: Free Dockerfile generator with templates for Node, Python, Java, Go, and more. Follows multi-stage build best practices, runs locally in your browser.
For local tools, open DevTools → Network and search your input — it should not appear in requests.
Usage Guide
Dockerfile generator — local browser tool; verify options on screen.
1. Use
Follow on-screen options; copy results locally.
- Open the tool.
- Set options.
- Copy output.
2. Scope
Capabilities match the visible UI, not wishful docs.
3. Checks
- Tiny sample first.
- Note options used.
- Keep PII private.
4. Limits
Browser memory and format edge cases still apply.
5. Related
Pair with sibling converters/checkers on this site.
6. Handoff
Document source, options, and known boundaries when sharing.
FAQ
No. Pick a stack, fill in the commands, copy the result — the whole flow runs locally in your browser and the configuration you type never passes through a server.
Dockerfile templates for mainstream languages including Node.js, Python, Java, Go, Rust, PHP, and Ruby, with options for the base image, single- or multi-stage builds, exposed ports, and install/build/run commands.
As a starting point, yes. Both single- and multi-stage are available: multi-stage keeps compile tooling in the builder and ships only artifacts, so the image is smaller and Go/Rust benefit most; non-root execution is the recommended practice. Ports, users, and health checks still need adjusting to the real project, and the install and start commands should match your project layout.
The output is ordered for cache hits: copy the lockfile first, run the install step next, copy source code last. Touch only business code and the dependency layers stay cached, so dependencies are not reinstalled on every build.
Yes — a .dockerignore draft comes alongside; copy both files to the project root. After building, run docker history to check whether .git or node_modules slipped into an image layer.
No. Never bake secrets into image layers; inject them through build arguments or runtime environment variables instead, and scan the base image to know where it came from.
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