Free Online Case Converter

Instantly convert text to UPPERCASE, lowercase, Title Case, or Sentence case. Simple, accurate, and completely private.

Pick a case above to transform your text instantly, then copy the result with one click.

About the Case Converter Tool

The Case Converter by Each Convert lets you switch text between four common capitalization styles instantly — no need to retype anything by hand. Paste your text, pick a case, and copy the result.

The Four Case Styles

  • UPPERCASE — every letter capitalized. Used for emphasis, acronyms, or headers.
  • lowercase — every letter in lowercase. Useful for normalizing usernames, tags, or slugs.
  • Title Case — major words capitalized and short words like "of" or "the" kept lowercase, ideal for headings and titles. Acronyms such as CSS stay in capitals.
  • Sentence case — only the first letter of each sentence capitalized, matching normal prose. Acronyms and names like iPhone keep their spelling.

How to Change Text Case

  1. Paste or type your text into the box above.
  2. Click the case you want: UPPERCASE, lowercase, Title Case or Sentence case.
  3. Copy the converted text and paste it wherever you need it.

The conversion happens instantly in your browser, so it works just as well for a single headline as for a long document.

Which Case Should You Use?

  • Headlines and titles — Title Case is traditional for book titles, article headlines and slide titles: "How to Write a Good Cover Letter".
  • Web headings and buttons — many style guides, including Google's, now prefer Sentence case because it reads more naturally: "How to write a good cover letter".
  • Accidental Caps Lock — paste the text and choose Sentence case to fix "tHIS SENTENCE WAS TYPED WITH CAPS LOCK ON" in one click.
  • Emails and lists — lowercase is handy for email addresses, tags and file names, which are easier to compare when written the same way.
  • Labels and warnings — UPPERCASE draws attention, but use it sparingly: whole paragraphs in capitals are hard to read.

Whatever you choose, keep one style for every heading on the same page or document so it looks consistent.

Related Reading

Not sure which case style fits your project? Read Title Case vs Sentence Case: Which Should You Use? on our blog. Also need a word or character count? Try our Word Counter.

Frequently Asked Questions (FAQs)

Does this tool store my text?

No. Everything runs directly in your browser. Your text is never uploaded or stored anywhere.

How does Title Case handle small words like "of" or "the"?

Title Case follows the common Chicago/APA style: short words such as a, an, the, and, or, of, to, in and on stay lowercase in the middle of a title, but are capitalized when they are the first or last word or come after a colon. Acronyms like CSS or PX and names like iPhone or JavaScript keep their original spelling, so type them correctly before converting. Text written entirely in capitals is converted normally.

Can I undo a conversion?

Yes — converting to a different case at any time re-transforms your current text, and you can always paste your original text back in if needed.