Wyvek

Case Converter

Convert text to UPPER, lower, Title & more.

Free online case converter

This case converter changes the capitalization of any text in one click — no retyping required. Turn a messy heading into Title Case, shout in UPPERCASE, tidy a paragraph into Sentence case, or reshape a phrase into developer-friendly formats like camelCase, snake_case, kebab-case, and CONSTANT_CASE. It's built for writers, editors, marketers, and programmers who need clean, consistent capitalization fast.

How to convert text case

  1. Type or paste your text into the left-hand box.
  2. Click the case style you want — the result appears in the output box instantly.
  3. Keep editing your text and the converted output updates automatically.
  4. Press Copy output to grab the result, or Clear to start again.

Which case should you use?

Use Title Case for headlines and Sentence case for body copy. Programmers reach for camelCase and PascalCase for variables and classes, snake_case or kebab-case for file names and URLs, and CONSTANT_CASE for configuration constants. Toggle cASE flips every letter's case, which is a quick fix for text typed with Caps Lock left on.

Private and free

Everything runs in your browser, so your text never leaves your device. Working with longer documents? Check your length with the word counter, or tidy pasted text with the remove line breaks tool before you convert its case.

Frequently asked questions

What does a case converter do?

A case converter changes the capitalization of your text without you having to retype it. Paste any text, click a style, and it is instantly rewritten as UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, or toggled case.

What is the difference between Title Case and Sentence case?

Title Case capitalizes the first letter of every word, which is common for headlines and titles. Sentence case lowercases everything and then capitalizes only the first letter of each sentence — the start of the text and the letter after every period, question mark, or exclamation mark.

How does it split words for camelCase and snake_case?

The converter splits your text into words wherever it finds spaces, punctuation, or other non-letter/number characters, and also at camelCase boundaries where a lowercase letter is immediately followed by an uppercase letter. Those words are then joined in the style you pick — for example joined with underscores for snake_case or with no separator for PascalCase.

Is my text sent to a server?

No. Every conversion runs entirely in your browser with JavaScript. Your text is never uploaded, stored, or shared, so it is safe to convert private notes, code, or confidential documents.

What is Toggle cASE useful for?

Toggle case inverts the case of every letter — uppercase becomes lowercase and lowercase becomes uppercase. It is handy for fixing text that was typed with Caps Lock on by accident, or for a quick playful, alternating style.

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