ENV Highlighter

Syntax highlighting for .env and .toml files in VS Code. Keys, values, numbers, booleans, comments, and interpolations are each given distinct scopes so they color correctly in any theme.

Features

• Highlights env keys, values, numbers, booleans, and comments
• Supports quoted strings, export, and ${VAR} interpolation in .env files
• Highlights TOML keys, values, sections, arrays, and inline tables
• Matches common env and TOML file patterns automatically

Supported tokens

.env

.toml

File matching

Automatically applies to:

.env

• .env
• .env.local, .env.production, .env.development, etc.
• any_name.env

.toml

• Cargo.toml, pyproject.toml, config.toml, and other .toml files

Installation

From the Marketplace (recommended)

1. Open VS Code.
2. Go to Extensions (Ctrl+Shift+X / Cmd+Shift+X).
3. Search for ENV Highlighter.
4. Click Install.

Or install from the command line:

code --install-extension env-highlighter.env-highlighter

Manual install

1. Download or clone this repo.
2. Copy the folder to your VS Code extensions directory:
   • Windows: %USERPROFILE%\.vscode\extensions\
   • macOS/Linux: ~/.vscode/extensions/
3. Restart VS Code.

Install from VSIX

code --install-extension env-highlighter-1.1.0.vsix

Customization

You can override colors in your settings.json:

{
  "editor.tokenColorCustomizations": {
    "textMateRules": [
      {
        "scope": "keyword.other.env.key.dotenv",
        "settings": { "foreground": "#C586C0" }
      },
      {
        "scope": "string.unquoted.value.dotenv",
        "settings": { "foreground": "#CE9178" }
      },
      {
        "scope": "keyword.other.toml.key.toml",
        "settings": { "foreground": "#C586C0" }
      },
      {
        "scope": "string.unquoted.value.toml",
        "settings": { "foreground": "#CE9178" }
      }
    ]
  }
}

Development

# Package the extension
npx @vscode/vsce package

# Publish (requires marketplace publisher + PAT)
npx @vscode/vsce publish

Open this folder in VS Code and press F5 to launch an Extension Development Host for local testing.

License

MIT