Case Converter

Paste text and switch it to uppercase, lowercase, title case, or sentence case in one click.

Runs in your browser — nothing is sent or saved.

How to change text case

  1. Type your text in the box, or paste it in.
  2. Press the case you want, such as UPPERCASE or Title Case.
  3. The text in the box changes right away.
  4. Press Copy to put the result on your clipboard.

The cases you can pick

This tool gives you seven common cases. UPPERCASE makes every letter big. lowercase makes every letter small. Title Case makes the first letter of each main word big, which suits headings. Sentence case makes only the first letter of each sentence big. camelCase, snake_case, and kebab-case join the words together and are used by people who write code, name files, or set up web addresses.

When each case helps

Title Case is the normal style for a headline or a book title. Sentence case reads like plain writing and fits body text. UPPERCASE can shout a short label, but a long block in capitals is hard to read, so keep it short. snake_case and kebab-case are common in file names and URLs because they have no spaces. camelCase shows up in variable names in many programming languages.

A note on Title Case

Good Title Case keeps small joining words lowercase. Words like "of", "the", "and", and "to" stay small unless they are the first word. So "the lord of the rings" becomes "The Lord of the Rings", not "The Lord Of The Rings". This tool follows that common rule, which matches most style guides used by newspapers and publishers.

FAQ

Does my text get uploaded?

No. The change happens in your browser. Your text stays on your device and nothing is stored. Refresh the page and it is gone.

Why does Title Case keep some words small?

Standard Title Case leaves short joining words lowercase, such as "of" and "the", unless they start the line. This tool follows that rule so your titles look right.

What is the difference between camelCase and snake_case?

camelCase joins words with no space and makes each new word start with a big letter, like "myFileName". snake_case joins words with underscores, like "my_file_name". Coders pick one based on the language or project they work in.

Can I undo a change?

There is no undo button, but you can press a different case to change it again. To start over, press Clear and paste your text back in.

Does it work with accented letters?

Yes. Letters with accents, such as é or ñ, switch case the same way as plain letters in UPPERCASE and lowercase.

How do I change text from uppercase to lowercase?

Paste the text and press the lowercase button. The tool can change case in both directions, so ALL CAPS turns readable again, or plain text becomes capitals.

Can it capitalize the first letter of each word?

Yes. Title Case does that for headings. Sentence case is softer: it capitalizes only the first word of each sentence and leaves the rest lowercase.