JSON to .env — Free Online Tool

The JSON to .env converter turns a JSON configuration object into a ready-to-use .env file. It flattens nested keys with a custom separator so your environment variables stay organized and deployment-ready.

How to Use

1. Paste the JSON configuration you want to convert
2. Set the separator for nested keys (default __)
3. Click Convert to .env
4. Copy the KEY=VALUE output into your environment file

Key Features

• Nested objects flattened with a custom separator
• Arrays and primitives handled automatically
• Alphabetical sorting for clean output
• One-click copy

FAQ

Why would I convert JSON to a .env file?

Many deployment platforms, containers and CI tools read environment variables from .env files, so a JSON config can be turned into standard KEY=VALUE lines without manual rewriting.

Is this tool free?

Yes, it works entirely in your browser and your data never leaves your device.

What formats are supported as input?

Any valid JSON object or array. Strings, numbers, booleans, null, nested objects and arrays are all converted.

Does it support custom separators?

Yes, you can set any separator such as __, _DOT_, or dot notation to flatten nested keys the way you prefer.