Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, Alternating Case and Inverse Case in one click. Numbers, punctuation and line breaks stay exactly as you typed them.
Case Converter Features
- UPPERCASE and lowercase conversion
- Title Case and Sentence case conversion
- Alternating Case conversion
- Inverse Case conversion
- Preserves numbers, punctuation and line breaks
- One-click copy and download
How to Use the Case Converter
- 1
Paste or type your text into the box below.
- 2
Click any case button — UPPERCASE, lowercase, Title Case, Sentence case, Alternating Case, or Inverse Case — to convert instantly.
- 3
Copy the converted text or download it as a .txt file.
What is a Case Converter?
A case converter is a tool that changes the capitalization of text without altering the words themselves. Instead of retyping a sentence to fix its casing, you can paste it in, choose a case style, and get the converted result instantly.
When Should You Use a Case Converter?
It's useful whenever text needs to match a specific style: converting a heading to Title Case, fixing text that was accidentally typed in all caps, preparing a sentence-case paragraph for an article, or creating a playful alternating-case caption for social media. It also saves time when reformatting long blocks of text that would be tedious to retype by hand.
Different Text Cases
UPPERCASE converts every letter to a capital letter. lowercase converts every letter to a small letter. Title Case capitalizes the first letter of each major word, commonly used in headings. Sentence case capitalizes only the first letter of each sentence, matching normal writing style. Alternating Case alternates between lowercase and uppercase letters for a stylized look. Inverse Case flips the existing case of every letter, so capitals become lowercase and lowercase letters become capitals.
Frequently Asked Questions
Is the Case Converter free to use?
Yes. The Case Converter is completely free, with no signup or usage limits.
What is the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every major word (commonly used for headings and titles), while Sentence case capitalizes only the first letter of each sentence, the way normal prose is written.
What does Inverse Case do?
Inverse Case flips the case of every letter: uppercase letters become lowercase, and lowercase letters become uppercase. Numbers, spaces and punctuation are left unchanged.
Will converting the case affect numbers or punctuation?
No. Numbers, symbols, punctuation and line breaks are preserved exactly as you typed them — only letter casing changes.
Is my text stored or uploaded anywhere?
No. All case conversion happens directly in your browser using JavaScript. Your text is not sent to a server as part of the conversion process, and it is not saved anywhere once you leave or refresh the page.
Can I use this tool on mobile?
Yes. The Case Converter is fully responsive and works on phones, tablets and desktop browsers.
Can I undo a case conversion?
The converter overwrites the text in the box each time you click a button. If you want to keep your original text, copy or download it before applying a conversion.