Dockerfile Generator
Online Dockerfile generator with base image, env, port, startup command, and multi-stage build options to create ready-to-use Dockerfile templates quickly.
Configuration
Dockerfile Output
Quick Templates
Dockerfile generated from current configuration
Guide
Dockerfile Generator builds clean Dockerfile content with visual options, helping teams reduce manual mistakes in local development, CI packaging, and production deployment workflows.
Key Features
- Configure base image, workdir, port, startup command, and environment variables.
- Use ready Node.js and Python templates for faster project setup.
- Enable multi-stage build and non-root user settings for smaller and safer images.
- Preview Dockerfile in real time and copy output in one click.
How To Use
- Choose a base image and fill workdir, port, and startup command.
- Toggle dependency install, multi-stage build, and non-root options as needed.
- Review generated Dockerfile in the output panel or switch templates.
- Copy content and save as Dockerfile for local or CI/CD build pipelines.
Use Cases
- Quick container setup for new projects
- Standardized Dockerfile migration for existing services
- Traceable image build config in CI pipelines
- Team review and delivery for container deployment configs
Dockerfile Best Practices
Image Optimization
- Prefer smaller base images such as alpine or slim variants.
- Split dependency install and source copy to improve layer cache hit rate.
- Use multi-stage builds to separate build and runtime environments.
Security
- Run applications as a non-root user whenever possible.
- Install only required system packages and runtime dependencies.
- Keep base images and dependency versions updated for vulnerability fixes.
Performance & Delivery
- Place frequently changed files in later Dockerfile layers.
- Use .dockerignore to reduce build context size.
- Reuse cached layers in CI to speed up packaging and delivery.
FAQ
- Does it run docker build automatically: no, it only generates Dockerfile text.
- Can it run offline: yes, generation works fully in browser.
- When to use multi-stage build: for frontend build and compiled apps that need smaller runtime images.
- Why use non-root user: to reduce privilege escalation risk after container compromise.
Privacy
Your image settings, environment variables, and generated output stay in local browser and are not uploaded to server.