Free Online Case Converter
Convert text to uppercase, lowercase, sentence case, title case, and more instantly. Paste, type, or upload your text and transform it in one click.
How To Use the Case Converter
Input Your Text
Type directly, paste from your clipboard, or securely upload a .txt file right into the text box above.
Choose the Case
Click on any of the conversion buttons (like UPPER CASE or Title Case) to instantly format your text.
Copy or Download
Once you are happy with the formatting, easily copy the result to your clipboard or download it as a text file.
All 7 Case Conversion Types Explained
Sentence case
Capitalizes the very first letter of a sentence and leaves all other letters in lowercase, perfectly matching standard written English rules.
lower case
Converts every single character in your text to small letters, removing all capitalizations entirely.
UPPER CASE
Transforms all text into capital letters. Ideal for headlines, warnings, or emphasizing specific words.
Capitalized Case
Capitalizes the first letter of every single word in your text, regardless of whether it is a noun, verb, or preposition.
aLtErNaTiNg cAsE
Alternates between lowercase and uppercase letters continuously. Often used on social media to express a mocking or sarcastic tone.
Title Case
Capitalizes the first letter of major words while keeping minor words (like "a", "the", "in") in lowercase. The standard for essays and book titles.
InVeRsE CaSe
Reverses the casing of your text. Any letter that was uppercase becomes lowercase, and any lowercase letter becomes uppercase. Useful if you accidentally left Caps Lock on!
Key Features
100% Secure & Private
All formatting and text manipulation happens directly in your browser. We never upload, view, or store your text data.
Download as .TXT
Working with a large document? Once you've fixed the casing, easily download the result as a text file to your computer instantly.
Real-Time Counters
Keep track of your document size with our built-in, real-time character, word, and line counters that update as you type.
Frequently Asked Questions
No. The text file upload and the case conversions happen securely on the client side (in your web browser). We do not store, upload, or save any of your text data on our servers.
Capitalized Case capitalizes the first letter of every single word. Title Case only capitalizes major words, leaving small connecting words (like "and", "of", "the", "in") in lowercase, which is standard for book titles or headlines.
Yes! The tool is highly optimized using plain JavaScript, allowing it to process thousands of words and paragraphs instantly without lagging your browser.
Yes. The case converter only changes the letter casing of your text. It preserves your original formatting, spacing, line breaks, and punctuation exactly as entered.
Inverse Case detects the current casing of each letter and flips it. For example, if you typed "hELLO wORLD" because your Caps Lock was accidentally left on, applying Inverse Case will instantly fix it to "Hello World".