Configuration file extensions
Declarative configuration and schema files used to tune applications, builds, and runtimes.
Total extensions in this category: 4
Extensions in Configuration
Explore the most searched extensions in this category.
- .env
Dotenv environment variables file
.env is a plain-text configuration file commonly used to store environment variables as key=value pairs for local development and deployment tools.
- .ini
INI configuration file
An INI file is a plain-text configuration file format commonly used to store settings as sections and key/value pairs. You can open it in any text editor, and many apps (especially on Windows) read it as an initialization/config file.
- .toml
TOML configuration file
A .toml file is a human-readable configuration file written in TOML (Tom's Obvious, Minimal Language). It’s commonly used by developer tools (for example, Rust’s Cargo.toml and Python’s pyproject.toml) and can be opened with any text editor.
- .dtd
XML document type definition (.DTD)
.dtd files are Document Type Definition files used with XML (and related SGML-family) documents to define the allowed structure, elements, and entities. You typically open them in a text editor or an XML-aware editor/IDE.