snake_case Converter
Convert text to snake_case for Python variables and database columns.
Private ● Runs entirely in your browser Your text never leaves your device.No account required.No data uploaded.Nothing stored unless you choose to save it.What is snake_case?
snake_case writes all letters in lowercase and joins words with underscores: "user profile image" becomes "user_profile_image". It is the dominant convention in Python for variables and functions, and in SQL for column and table names.
Why do Python and SQL prefer snake_case?
Underscores make multi-word names easy to read without ambiguity, and lowercase identifiers sort and compare predictably. SQL keywords are case-insensitive, so lowercase snake_case avoids surprises across databases.
What is SCREAMING_SNAKE_CASE?
It is snake_case in all capitals ("MAX_RETRY_COUNT") used for constants in many languages. To produce it, convert to snake_case here and then use the uppercase converter.
How are different input formats handled?
Spaces, hyphens, existing underscores, and camelCase humps are all treated as word boundaries. So "first-name", "firstName", and "First Name" all become "first_name". Each line is converted independently.