OptiDrop

Text Case Converter Online — Uppercase, Lowercase & More

Convert text between UPPERCASE, lowercase, Title Case, Sentence case, and aLtErNaTiNg CaSe instantly. Paste your text, click a button, and copy the result. No upload, no sign-up — 100% free.

Input: 0 characters Output: 0 characters

Free Online Text Case Converter

OptiDrop's Text Case Converter is a free, browser-based tool that lets you instantly convert text between different letter cases. Whether you need to convert text to ALL CAPS for emphasis, switch to lowercase for consistency, apply Title Case for headings, use Sentence case for paragraphs, or create alternating case for fun, this tool handles it all with a single click.

Five Case Conversion Modes

UPPERCASE converts all letters to capital letters. lowercase converts all letters to small letters. Title Case capitalizes the first letter of each word. Sentence case capitalizes only the first letter of each sentence. aLtErNaTiNg CaSe alternates between upper and lower case for each character.

100% Private — No Data Uploaded

All text processing happens directly in your browser using JavaScript. Your text is never sent to any server, never stored anywhere, and never leaves your device. This makes it safe for converting sensitive text, passwords, personal notes, and confidential documents.

Frequently Asked Questions

Paste or type your text into the input area on our Text Case Converter, then click the "UPPERCASE" button. All letters will be converted to capital letters instantly. You can then copy the result using the Copy button.
Title Case capitalizes the first letter of each major word in a sentence. Articles (a, an, the), short prepositions (in, on, at), and coordinating conjunctions (and, but, or) are typically left lowercase unless they are the first word. Example: "the quick brown fox" becomes "The Quick Brown Fox".
Paste your lowercase text into the input field and click the "UPPERCASE" button. The tool converts every lowercase letter to its uppercase equivalent instantly. This works for any language that uses Latin alphabet characters.
Alternating case (also called SpongeBob case or mocking case) alternates between uppercase and lowercase letters for each character. For example, "hello world" becomes "hElLo wOrLd". It is commonly used in internet humor and memes.

Last updated: June 2026