Case Converter
Convert text between seven cases — UPPER, lower, Title, Sentence, camelCase, snake_case and kebab-case — instantly, free, and entirely in your browser.
Works with single words, headlines, or whole paragraphs.
Enter your values to see the result.
How it works
Pick a target case and paste your text; the conversion runs as you type. Title Case capitalizes the first letter of every word, Sentence case lowercases everything then re-capitalizes after periods, exclamation marks and question marks, and the programmer cases (camelCase, snake_case, kebab-case) first strip stray punctuation, split on word boundaries, and rejoin with the right convention. Like every tool here, the conversion happens locally in your browser — nothing is uploaded, logged, or stored, so it is safe for client copy, credentials-adjacent snippets, or anything else you would rather not paste into a random website.
Frequently asked questions
Which cases do programmers actually need?
camelCase dominates in JavaScript variables and JSON keys, snake_case is the convention in Python, Ruby and SQL column names, and kebab-case is standard for URLs, CSS class names and file names. This tool converts any phrase into all three so your naming stays consistent across languages.
Does Title Case follow a specific style guide?
Style guides disagree: AP skips short prepositions, Chicago has long sub-rule lists, and titles like “the” or “of” are treated differently everywhere. We use one honest, predictable rule — capitalize the first letter of every word — so you always know exactly what you will get.
Is there a keyboard shortcut for changing case?
Some apps have one: Microsoft Word cycles cases with Shift+F3, Google Docs hides it under Format → Text → Capitalization, and VS Code offers transform-to-uppercase or transform-to-lowercase commands. This converter covers every case in one place and works anywhere, including phones and apps without shortcuts.