.env.example Generator

.env.example generator - the config template that belongs in your repository

The .env.example generator assembles an environment variable template for Laravel, Node.js and Python. Pick a framework, type an application name, choose a database and decide whether the project uses Redis and mail. The result is a file with the full list of keys grouped by section comments, in which every secret is left empty - the file that should sit in Git next to your code.

Why keep .env.example when .env is ignored

A .env holding the real database password and application key has no business being in a repository, which is why it goes into .gitignore. The only list describing which variables the application needs disappears along with it: a new teammate clones the project and hits an exception about a missing key whose name appears nowhere in the code. .env.example closes that gap, and being versioned it turns a new integration into a visible diff line. When setting up a fresh repository, produce the ignore list first with the gitignore generator and check that .env is on it while .env.example is not.

What this tool produces

The three templates match the three naming conventions you will meet most often: Laravel keeps database parameters in separate variables, while Node.js and Python fold them into a single connection URL. The Redis and mail switches add their own blocks, and the output passes through key deduplication.

An environment variable is not a .env file

An environment variable belongs to the process: the operating system, a container or a hosting panel sets it, and it exists regardless of the files in the directory. A .env file only loads such variables on a development machine - a library reads it, not the system. A variable already present in the environment usually is not overridden by an entry in the file, which is why production often needs no .env at all: configuration arrives from a secrets manager or a server directive such as SetEnv, covered by the .htaccess file generator. The .env.example stays a contract - it says what to supply, not where from.

Values: empty secrets, harmless dummies, quotes and spaces

There is a single rule: no value in .env.example may be real. Signing keys and passwords stay empty so the application complains on the first run instead of quietly starting on a value copied from an example. Harmless settings such as APP_ENV=local, PORT=3000 or 127.0.0.1 are worth filling in: they reduce project setup to a single cp .env.example .env. A connection URL is shown in a comment while the value stays empty, so the repository never carries what looks like a working username and password.

Quoting is a trap of its own. An unquoted value ends at the first space or at a # character, so a name made of two words needs quotes. Inside double quotes some libraries expand ${ANOTHER_VARIABLE} and escape sequences, while single quotes do not. The generator quotes a value only when it has to:

APP_NAME=MyApp
APP_NAME="Acme Shop"
MAIL_FROM_NAME="${APP_NAME}"
DB_PASSWORD=

Real secrets are created later and locally - reach for the password generator.

Comments, key order and startup validation

Everything from a # to the end of the line is a comment - the only place to explain where a value comes from and whether it is required. The generator uses comments as section headers and as commented-out examples wherever the value itself has to stay empty. When both files list keys in the same order a diff exposes gaps in a second; a file that has already drifted is straightened out by the .env file variable sorter.

A template alone forces nobody to fill the blanks, so required variables should be checked when the process boots rather than at the moment some function first reaches for an API key. Missing configuration should stop a deployment immediately, with a message naming the variable. In Laravel that belongs in the config directory reading env(), in Django in the settings module from the settings.py configurator.

How to use the generator

1. Pick a framework - the variable names and the database layout follow from this field.
2. Type the application name; a name made of several words is quoted automatically.
3. Choose the database: MySQL, PostgreSQL, or no external database when using SQLite.
4. Tick Redis and mail if the project uses them.
5. Click Generate .env.example, save the result in the root of the repository, then run cp .env.example .env and fill in the empty values.

Frequently asked questions