Snake Case Converter
snake_case — all lowercase with words joined by underscores (like this_example) — is the standard for Python variables, database columns, and file names. This converter produces clean snake_case from any input.
What snake_case looks like
"user profile picture" becomes "user_profile_picture". Everything lowercase, words joined with underscores.
Where snake_case is used
Python variables and functions, database column names, environment variables, and UNIX file names.
Why use a converter
Converting between camelCase, kebab-case, and snake_case by hand is error-prone. Paste and convert in one click.
Frequently asked questions
Is snake_case the same as SCREAMING_SNAKE_CASE?
No — SCREAMING_SNAKE_CASE (all caps) is used for constants. This tool outputs lowercase snake_case; use the uppercase converter for constants.
Does it handle camelCase input?
Yes — the converter splits camelCase words and joins them with underscores (myVar → my_var).
Is it free?
Yes — free, unlimited, browser-based.
Free · No sign-up · Works in your browser