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Snake Case Converter

The Snake Case Converter rewrites phrases as snake_case — all lowercase words joined by underscores — the naming convention of Python, Ruby, and most database columns. It is the reliable bridge when you are turning UI labels or camelCase names from another codebase into valid Python identifiers or column names, and it works from any starting style.

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How to use Snake Case Converter

  1. Type or paste a phrase or identifier in any style.
  2. The snake_case version appears in the result box immediately.
  3. Copy the result into your code or schema.

Supported behavior

  • Words are detected across spaces, hyphens, dots, underscores and camelCase humps.
  • Everything is lowercased and accents are stripped for ASCII-safe identifiers.
  • Runs of separators collapse into single underscores.

Best for

  • Python and Ruby variable and function names.
  • Database table and column names.
  • Configuration keys in YAML and environment files.

Limits

  • Acronyms are lowercased as whole words: 'user ID' becomes 'user_id', which is usually what you want, but 'HTML parser' becomes 'html_parser'.
  • Results are single identifiers; sentences lose their punctuation.

Privacy notes

  • Everything runs on your device: the text you type never leaves your browser.
  • Your input stays in the browser tab where you typed it.

Related tools

Case Converter Convert Case See your text in every case style at once and copy the one you need. Case Converter Camel Case Converter Turn phrases into camelCase identifiers for code. Case Converter Snake Case Converter Turn phrases into snake_case for Python and databases. Case Converter Kebab Case Converter Turn phrases into kebab-case for URLs and CSS classes.

Snake Case Converter FAQ

What is snake_case used for?

It is the standard naming style for variables and functions in Python and Ruby, and a very common choice for database columns and config keys.

Can it convert camelCase to snake_case?

Yes. camelCase humps are detected as word boundaries, so 'helloBraveWorld' becomes 'hello_brave_world'.

How is CONSTANT_CASE different?

It is snake_case shouted: same underscores, but UPPERCASE. Use the Constant Case Converter for environment variables and true constants.