Case Converter

About this tool

Case Converter takes any text and re-cases it on demand: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, plus toggles for the rarer dot.case, path/case, and aLtErNaTiNg. Each format is shown in its own row so you can copy the exact one you need without re-running the conversion.

Title and Sentence case use a small stop-words list (English: "and", "of", "the", etc.) so titles read naturally — "The Lord of the Rings", not "The Lord Of The Rings". For camelCase, snake_case, and friends, the tool tokenises the input first (splitting on whitespace, punctuation, and existing case transitions), then re-joins with the target separator and casing rules. Non-ASCII characters are preserved when possible — "über" stays "über" through every transformation.

When to use this tool

• Renaming code identifiers. A function imported as getUserId needs to become get_user_id in Python or GET_USER_ID as an env var — paste once, copy the variant.
• Normalising data exports. A CSV column called First Name becomes first_name for the database and firstName for the API.
• Writing consistent titles and headings. Apply Title Case automatically instead of guessing capitalisation rules.
• Generating slugs for URLs. Turn "How to set up Docker" into how-to-set-up-docker in one click.

The naming-convention zoo

Different ecosystems prefer different conventions: JavaScript and Java favour camelCase for variables and PascalCase for classes; Python uses snake_case for functions and PascalCase for classes; Ruby uses snake_case for everything except class names; C# uses PascalCase even for methods. Environment variables are universally CONSTANT_CASE. URL slugs are kebab-case. Each convention is unambiguous in its own ecosystem; mixing them is what makes naming hard.