Free Online Case Converter
Convert text between uppercase, lowercase, title case, and sentence case with a single click. Ideal for editing documents, emails, and social media posts.
How to Use
Paste your text into the input area, then click one of the four conversion buttons. The result appears immediately in the output box below. Use "UPPER" for all caps, "lower" for all lowercase, "Title Case" to capitalize the first letter of each word, or "Sentence case" to capitalize only the first letter of each sentence.
Why Choose This Tool?
Unlike online tools that require page reloads or send your data to a server, this case converter processes everything locally in real time. It handles large documents instantly and works offline once the page is loaded.
Frequently Asked Questions
What is the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every word (e.g., "Hello World"). Sentence case only capitalizes the first letter of each sentence and after punctuation marks like periods, exclamation points, and question marks.
Does it handle accented characters?
Yes. The tool uses JavaScript's native string methods which fully support Unicode, including accented characters.
Is it completely free?
Yes. No hidden fees, no limits, no ads.
Is my data safe?
Absolutely. All conversions happen locally in your browser. Nothing is sent to any server.
Can I use it on mobile?
Yes. The interface is fully responsive and works on phones, tablets, and desktops.