Should You Commit Your Procfile?

If you deploy to Heroku, Railway, Render, or any platform-as-a-service that reads process definitions from your repo, you probably have a Procfile sitting in your project root. Maybe you created it from a getting-started guide. Maybe the platform generated one during setup. Either way, you're now looking at git status and wondering whether it belongs in version control.

Yes. Commit it.

A Procfile is not optional configuration. It is the instruction that tells your hosting platform how to start your application. Without it checked into your repository, your deployments either rely on platform defaults (fragile) or manual dashboard settings (undocumented and easy to lose). Neither is a good place to be when you're a solo founder shipping fast.

What a Procfile actually is

A Procfile is a plain text file — no extension, no special encoding — that declares the process types your application needs to run. Each line follows the same format:

<process type>: <command>

The most common process types are:

• web — your HTTP-facing process, the thing that handles requests
• worker — background job processors (queues, scheduled tasks, email sending)
• release — a command that runs once during each deployment, before new processes start (database migrations, asset uploads)

That's it. No YAML nesting, no JSON brackets, no schema to memorize. One line per process.

A practical example

Here is what a typical Procfile looks like for a Node.js application running Next.js:

web: npm start

That single line tells Heroku (or Railway, or Dokku) to run npm start as the web process. The platform assigns a port via the PORT environment variable, and your app listens on it.

A more complex application might look like this:

web: npm start
worker: node jobs/worker.js
release: npx prisma migrate deploy

This tells the platform three things: start the web server, run a background worker process, and execute Prisma database migrations on every deploy before the new code goes live. All of that is captured in three lines of plain text, checked into your repo, and versioned alongside your code.

For a Python project using Django and Celery, the pattern is similar:

web: gunicorn myproject.wsgi
worker: celery -A myproject worker --loglevel=info
release: python manage.py migrate

Why it belongs in version control

Apply the same questions you would ask about any file in your repository. (For the full decision framework, see The Developer's Guide to What Belongs in Your Git Repository.)

Does it contain secrets? No. A Procfile contains shell commands. It may reference environment variables by name ($PORT, $DATABASE_URL), but it never contains their values. The actual secrets live in your platform's environment configuration or in .env files that you keep out of git.

Is it needed for the app to function? Yes. Without it, the platform either guesses how to run your app or falls back to a default that may not match your needs.

Is it specific to one developer's machine? No. It describes how the application runs in production, which is the same for everyone.

Is it generated by a build step? No. You write it by hand.

Commit it.

Procfile vs Dockerfile

If you have worked with containers, you might wonder how a Procfile relates to a Dockerfile. They solve different problems at different layers.

A Dockerfile defines your entire runtime environment — the base OS, system dependencies, build steps, and the final image. It answers the question: "What does the container look like?"

A Procfile defines what commands to run inside that environment. It answers the question: "How do you start the app?"

Some platforms use both. Heroku can build from a Dockerfile and still read a Procfile for process definitions. Railway and Render behave similarly — the Dockerfile builds the image, and the Procfile (or the platform's equivalent) defines which processes to launch from it.

If your deployment is container-based and your Dockerfile already includes a CMD or ENTRYPOINT, you may not need a Procfile at all. But if your platform expects one, commit it. There is no conflict between the two files. For more on Dockerfiles in version control, see Should You Commit Your Dockerfile?

Procfile.dev for local development

Many developers use Procfile.dev (sometimes called Procfile.local) alongside tools like foreman, overmind, or honcho to run multiple processes locally. A typical Procfile.dev might look like this:

web: next dev
worker: node jobs/worker.js
css: npx tailwindcss --watch

Should you commit Procfile.dev? Usually yes. It documents how to run the full application locally and helps new contributors (or future-you after a break) get up and running without guessing which commands to start in which terminals. It contains no secrets — just commands — so there is no risk in committing it.

The only reason to keep it out of version control is if every developer on the team has a genuinely different local setup. For a solo founder, that is not your situation. Commit it.

Secrets and environment variables

A well-written Procfile never contains secrets directly. You will sometimes see commands that reference environment variables:

web: bundle exec puma -p $PORT

This is safe. The $PORT variable is resolved at runtime by the platform, not baked into the file. The Procfile is a template for how to start processes — the actual values come from the environment.

If you find yourself tempted to hardcode a database URL, API key, or token into a Procfile, stop. Use your platform's environment variable configuration instead. The Procfile stays clean and secret-free, which is exactly why it is safe to commit.

.gitignore: nothing to add

There is nothing to exclude. Your Procfile and Procfile.dev are both safe to commit. They contain no secrets, no machine-specific paths, and no generated output. Leave .gitignore alone.

The bottom line

A Procfile is a small file with an outsized role: it is the contract between your code and your hosting platform. Commit it, version it, and treat it like any other piece of infrastructure configuration. When your deploy breaks at 2 AM, you will be glad the answer to "how does this app start?" is sitting right there in your repo history, not buried in a platform dashboard you forgot to screenshot.