Online Case Converter

Switch text between six common casing styles at once — the same tool covers writing (Title Case, Sentence case) and coding conventions (camelCase, snake_case) rather than needing separate tools for each.

Features:

• UPPERCASE / lowercase: Convert every letter's case.
• Title Case: Capitalizes Most Words, the way headings and titles are styled.
• Sentence case: Capitalizes only the first word of each sentence.
• camelCase / snake_case: The two most common programming naming conventions.

1. Writing Styles vs. Code Styles

Title Case and Sentence case are for prose — headings, article titles, UI labels. camelCase and snake_case are for identifiers — variable names, function names, database columns — where spaces aren't allowed and the casing itself carries the word boundaries.

2. Naming Convention by Language

camelCase: JavaScript, Java, C# variables and functions
snake_case: Python and Ruby variables, SQL column names
PascalCase (not covered here, capitalize every word with no separator): class names in most languages