snake_case Converter Privacy: All processing runs locally

How It Works

The snake_case converter transforms any text into snake_case format, which is one of the most popular naming conventions in programming. In snake_case, all letters are lowercase and words are separated by underscores (_).

This tool intelligently handles multiple input formats:

• camelCase — myVariableName becomes my_variable_name
• PascalCase — MyClassName becomes my_class_name
• Spaces — hello world becomes hello_world
• Hyphens (kebab-case) — my-component becomes my_component
• CONSTANT_CASE — MAX_VALUE becomes max_value
• Mixed input — Some mixedInput-text becomes some_mixed_input_text

snake_case is the standard naming convention in Python, Ruby, Rust, and many database systems. It is also commonly used for file names, JSON keys, and API field names. The format is valued for its readability and consistency in code where underscores clearly delineate word boundaries.

The conversion runs entirely in your browser using JavaScript. No text is transmitted to any server, making this tool safe for converting sensitive variable names, internal project identifiers, or proprietary code.