Case Converter
Transform your text instantly. Convert between UPPERCASE, lowercase, Title Case, and more—free, fast, no sign-up.
Our case converter is the fastest way to transform text between different capitalization styles. Whether you accidentally typed in caps lock, need to format titles properly, or want to fix inconsistent capitalization, this free tool handles it instantly—no account required, no software to install.
The tool supports seven conversion modes: UPPERCASE converts everything to capital letters, perfect for headings, acronyms, and emphasis. lowercase makes everything small, useful for reformatting shouting text or creating a subdued tone. Title Case capitalizes the first letter of each word, following standard title formatting rules. Sentence case capitalizes only the first letter of each sentence, ideal for paragraph text.
For creative purposes, aLtErNaTiNg CaSe creates the popular mocking text style used in memes and social media. Inverse case flips existing capitalization—turning upper to lower and vice versa—useful for fixing caps lock mistakes. Capitalize Words ensures every word starts with a capital, regardless of word length.
Professionals use case conversion constantly: writers fixing manuscript formatting, marketers preparing ad copy, developers standardizing code comments, students formatting citations, and social media managers crafting posts. Our tool processes text instantly in your browser—your content never leaves your device, ensuring complete privacy.
Unlike basic find-and-replace, proper case conversion handles edge cases intelligently. Title Case, for example, correctly handles contractions, preserves intentional capitalizations, and follows typographic conventions. Whether you're processing a single headline or an entire document, the conversion maintains your text's integrity while transforming its appearance.
Conversion Examples
See how each mode transforms text
UPPERCASE
All letters converted to capitals
lowercase
All letters converted to small
Title Case
Major words capitalized
Sentence case
First letter of sentences capitalized
aLtErNaTiNg CaSe
Alternating upper and lower
Inverse Case
Swap upper and lower
Quick Copy Results
Click to copy common case conversions
How to Use
Enter Text
Type or paste your text in the input field above
See All Results
All conversions appear instantly below
Click to Copy
Click any row to copy that result
Case Converter FAQ
Title Case capitalizes the first letter of major words while keeping minor words (like 'a', 'the', 'and', 'of') lowercase, unless they start the title. Use it for headlines, article titles, book titles, and headings. Example: 'The Art of War' not 'The Art Of War'.
Sentence case capitalizes only the first letter of the first word in each sentence, like normal writing. Title Case capitalizes the first letter of most words. Use Sentence case for body text and paragraphs; use Title Case for headlines and titles.
No. All text processing happens directly in your browser. Your text never leaves your device and is never sent to any server. We have no access to what you type—your content remains completely private.
Yes, Word has built-in case conversion (Shift+F3 cycles through options, or Format → Change Case). However, our tool offers more options like alternating case and is accessible without opening Word. You can copy the result directly into your document.
aLtErNaTiNg CaSe became popular as 'mocking SpongeBob' text in memes, used to indicate sarcasm or mockery. It's also used for stylistic effect in usernames, social media posts, and creative writing where you want to convey a mocking or chaotic tone.
Simply paste your ALL CAPS TEXT here and click 'Sentence case' to properly capitalize sentences, or 'lowercase' if you want all small letters. The 'Inverse Case' option also works if you had caps lock on while typing.
Yes! The converter handles accented characters (é, ñ, ü), Cyrillic, Greek, and other Unicode letters. Numbers, symbols, and punctuation remain unchanged. Only actual letters are affected by case conversion.
Absolutely! The tool works fully on smartphones and tablets. Tap the input box to type or paste text, then tap your desired conversion button. The 'Copy' button works the same way—tap to copy the result.
The tool handles texts up to 100,000 characters efficiently in most browsers. For very large documents, processing may take a moment. There's no practical limit for typical use cases like articles, emails, and social media content.
In standard Title Case, articles (a, an, the), coordinating conjunctions (and, but, or), and short prepositions (of, in, to) stay lowercase unless they're the first or last word. Our Title Case follows these conventions automatically.