Snake Case Converter
The free snake case converter turns any text into snake_case in one click —hello world becomes hello_world. It lowercases every word and joins them with underscores, so you can also convertcamelCase,kebab-case, orCONSTANT_CASE back to clean snake_case.
Open the snake_case tool, paste your text, and press Convert (Ctrl+Enter).
How to convert text to snake_case
- Paste your text into the online case converter.
- Select snake_case from the sidebar.
- Click Convert, then copy or download the result.
When to use snake_case
- Python & Ruby: variable names, function names, and module-level identifiers.
- Databases: normalize column and table names like first_name, created_at.
- Files & URLs: readable file names where hyphens are not allowed.
Frequently asked questions
How do I convert text to snake_case?
Paste text into the homepage tool, choose snake_case, and click Convert.
When should I use snake_case?
Python and Ruby identifiers, database columns, and file names.
What is the difference between snake_case and kebab-case?
Underscores vs hyphens. Code identifiers use snake_case; URLs and CSS use kebab-case.
Is the snake case converter free?
Yes — free, unlimited, and private with in-browser processing.
Related converters:case converter ·kebab-case converter ·camel case converter ·PascalCase converter ·CONSTANT_CASE converter ·slug converter