How to Generate a Script Template Online — Free Tool (2026)

Writing a new shell script from scratch takes time — adding argument parsing, help text, logging, and error handling before you even reach the actual logic. The brevio Script Generator scaffolds a production-ready template in seconds, directly in your browser. No server, no signup, nothing uploaded.

The generator supports four languages: Bash, PowerShell, Python, and Node.js. Each template follows real-world conventions used by professional developers: strict mode, structured logging with timestamps, usage documentation, and clean argument parsing.

How to generate a script template

1. Choose your language. Select Bash for Linux/macOS automation, PowerShell for Windows or cross-platform work on recent systems, Python for data processing or system scripts, and Node.js for JavaScript-based CLI tools.
2. Fill in the script name and description. These populate the shebang comment header and the help text printed when someone runs the script with --help.
3. Add your author name. This appears in the file header comment, useful for scripts shared across a team.
4. Add input parameters. Click "Add parameter" for each CLI argument your script will accept. Set the name (e.g. output-dir), type (string, number, boolean, or file), and an optional default value. The generator wires up the full argument-parsing boilerplate for each parameter.
5. Click Generate Script. The template appears in the output box. Click Copy to paste it into your editor, or Download to save the file with the correct extension (.sh, .ps1, .py, or .js).

What each template includes

The Bash template sets set -euo pipefail for strict error handling — the script exits immediately on any unhandled error, undefined variable reference, or failed pipe. It includes three logging functions (log, warn, err) that print to stderr with timestamps, and a complete usage() function populated with your parameter definitions.

The PowerShell template uses Set-StrictMode -Version Latest and $ErrorActionPreference = 'Stop', equivalent to Bash strict mode. Parameters are typed ([string], [int], [switch]) and declared in a param() block following the comment-based help standard that PowerShell's Get-Help reads automatically.

The Python template uses argparse for argument handling and Python's standard logging module for structured output. It follows the if __name__ == "__main__" entry-point pattern so the module can also be imported without side effects.

The Node.js template works with zero dependencies, using only process.argv. It includes async/await support in the main() function and a consistent logging pattern that writes to stderr so the script's output can be piped cleanly.

Tips for scripting productivity

Generate the scaffold first, then fill in the logic in the TODO section. This approach separates structure from implementation and prevents common mistakes like forgetting to handle missing arguments or running code without a help flag. For Bash scripts, make the file executable with chmod +x your-script.sh immediately after saving.

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