Case Converter

Convert text case between UPPERCASE, lowercase, Title Case, Sentence Case, Capitalized Case, and alternating case.

100% Client-Side

Input

Chars: 0Words: 0

What is Case Converter?

This case converter is the all-in-one text case converter for switching between UPPERCASE, lowercase, Title Case, Sentence case, and more, all from one input box. Whether you're fixing text someone left in all caps or need a convert text case online solution for a dozen different styles at once, this tool covers them all in a single click.

How It Works

The tool applies a different capitalization rule depending on which style you select: uppercase converts every letter to capital, lowercase converts everything to small letters, Sentence case capitalizes only the first letter of each sentence, Title Case capitalizes major words, and alternating case flips case letter by letter.

Is It Safe to Use?

All case conversion happens instantly in your browser, so your original text, whatever it contains, is never transmitted to a server or logged.

How to Use Case Converter (Step-by-Step Guide)

Paste your text into the input box.
Choose the case style you want: uppercase, lowercase, Title Case, Sentence case, Capitalized Case, or alternating case.
View the converted text instantly.
Copy the result to your clipboard.
Paste it into your document, email, or message.

Frequently Asked Questions

Can I switch between multiple case styles without retyping my text?

Yes, once your text is entered, you can try different case options and the output updates instantly without needing to paste it in again.

What's the difference between Sentence case and Title Case?

Sentence case converter rules only capitalize the first letter of each sentence, while Title Case capitalizes most major words throughout, similar to a book or article title.

Can I use this uppercase to lowercase converter for fixing text someone sent in all caps?

Yes, that's one of the most common uses — converting shouty all-caps messages into normal, readable lowercase or sentence case.

Does it handle special characters or numbers?

Numbers and symbols are left unaffected since case conversion only applies to letters.

Can I use this on mobile?

Yes, it works fully on mobile browsers just like on desktop.

Is there a text length limit?

No, it handles both short snippets and much longer documents.

What is alternating case used for?

Alternating case, which flips upper and lower case letter by letter, is mostly used for a playful, mocking text style popular in memes and casual messaging.

Is this tool free to use?

Yes, completely free with no sign-up required.

Style Guide Comparison

Style	Prepositions	Conj. lowercase	Last word
Chicago	≤ 4 letters	for, and, nor, but, or	✓
AP	≤ 3 letters	FANBOYS	✓
APA	≤ 3 letters	FANBOYS	–
MLA	All	FANBOYS	✓
AMA	≤ 3 letters	FANBOYS	–
NY Times	Selected	for, and, but, or	✓

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