Combine Multiple .env Files Online – Merge, Sort & Deduplicate

Home » Combine Multiple .env Files Online – Merge, Sort & Deduplicate
Input Files

Drag & Drop .env files here

or click to browse
Merged Output
Total Keys: 0
Duplicates Removed: 0

About the Tool

Managing environment variables across multiple services, environments (development, staging, production), and teams can be chaotic. This Combine Multiple .env Files Online tool simplifies the process by allowing you to merge multiple configuration files into a single, clean output.

Whether you need to consolidate local overrides with a base configuration or prepare a deployment file, our tool handles parsing, deduplication, and sorting automatically—all within your browser. No data is ever sent to a server.

Key Features

  • Secure & Client-Side: All processing happens in your browser. Your sensitive API keys and secrets never leave your device.
  • Smart Conflict Resolution: Choose whether the first or last file takes precedence when duplicate keys are found.
  • Export Options: Download as a standard .env file, export to JSON for config maps, or generate a sanitized .env.example file for your repository.
  • Sorting & Cleanup: Automatically sort keys alphabetically to keep your configuration organized.

How to Use

  1. Upload Files: Drag and drop your .env files into the upload area. You can upload as many files as you need.
  2. Arrange Priority: The order of files matters! If "Last File Wins" is selected, files lower in the list will override values from files above them.
  3. Configure Options: Select your preferred sorting method (A-Z, Z-A, or None) and conflict resolution strategy.
  4. Merge & Export: Click "Merge Files" to see the result. Use the export buttons to copy to clipboard or download in your desired format.

Tips for Developers

When working with Docker or Kubernetes, you can use the Export JSON feature to easily create ConfigMaps or Secret manifests. Use the Generate .env.example feature to strip out sensitive values (setting them to empty strings) before committing to Git.

Frequently Asked Questions

Is it safe to upload my .env files here? +
Yes, absolutely. This tool runs entirely on the client-side using JavaScript. Your files are processed in your browser's memory and are never uploaded to any server. You can verify this by disconnecting your internet before using the tool.
How does the tool handle comments? +
Currently, the tool focuses on merging key-value pairs. Inline comments might be stripped during the parsing process to ensure a clean, valid output format. We recommend keeping comments in a separate documentation file or header.
Can I convert .env to JSON? +
Yes! After merging your files, simply click the "Export JSON" button to get a valid JSON object representation of your environment variables.
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