Snake Case Converter — Free Online Tool
Last updated: January 2025
What is Snake Case Converter?
snake_case joins words with underscores in all lowercase — like this_is_snake_case.
When to use Snake Case Converter?
Use snake_case for Python variables and functions, database column names, file names, and Ruby naming conventions.
How to use this tool
- 1Enter your text or phrase
- 2Click 'Convert' to get snake_case
- 3Copy and use in your code or database
Examples
| Input | Output |
|---|---|
| Hello World | hello_world |
| firstName | first_name |
| background-color | background_color |
| My Database Column | my_database_column |
| THE QUICK BROWN FOX | the_quick_brown_fox |
Rules & Behavior
- All words are lowercase
- Words are separated by underscores (_)
- Spaces, hyphens, and dots are replaced with underscores
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Frequently Asked Questions
What is snake_case?
snake_case is a naming convention where all words are lowercase and separated by underscores. It looks like a snake lying flat on the ground.
When is snake_case used?
Python PEP 8 recommends snake_case for variables, functions, and module names. It's also used in database schemas, file names, and Ruby.
What's the difference between snake_case and SCREAMING_SNAKE_CASE?
snake_case is all lowercase. SCREAMING_SNAKE_CASE (constant case) is all uppercase with underscores, used for constants and environment variables.
Can it convert camelCase to snake_case?
Yes! CamelCase words are split at uppercase letters and converted to snake_case automatically.
Does it handle special characters?
Special characters are removed. Only letters, numbers, and underscores are kept in the output.