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Snake Case Converter

Convert text to snake_case or SCREAMING_SNAKE_CASE from any format — spaces, camelCase, PascalCase, or kebab-case.

snake_case
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SCREAMING_SNAKE
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About Snake Case Converter

snake_case uses underscores to separate words with all letters in lowercase. SCREAMING_SNAKE_CASE is the same but with all letters uppercase. Both are widely used in programming for different purposes.

How to Use

  1. Type or paste your text into the input field (any format accepted).
  2. Both snake_case and SCREAMING_SNAKE_CASE appear in real-time.
  3. Click "Copy" next to the format you need.

Where Is snake_case Used?

snake_case is the standard naming convention in Python for variable names, function names, and file names. It is also used in Ruby, database column names (SQL), and many configuration file formats. Example: user_first_name, calculate_total_price, get_user_by_id.

SCREAMING_SNAKE_CASE is used for constants and environment variables in most languages. Example: MAX_RETRY_COUNT, DATABASE_URL, API_SECRET_KEY.

FAQ

The converter accepts: space-separated words, camelCase, PascalCase, kebab-case, and existing snake_case. It splits on spaces, hyphens, underscores, and camelCase word boundaries.
Neither is universally better — it depends on the language and context. Python strongly prefers snake_case (PEP 8). JavaScript/TypeScript prefer camelCase for variables. Always follow the conventions of the language and codebase you are working in.
SCREAMING_SNAKE_CASE (all uppercase with underscores) is the conventional format for constants and environment variables in most programming languages. Examples: MAX_CONNECTIONS, API_BASE_URL, DEFAULT_TIMEOUT_SECONDS.