Case Converter – UPPERCASE, lowercase, Title Case & Sentence Case

Fix the casing of any text in one click. This free case converter turns text into UPPERCASE, lowercase, Title Case or Sentence case, with a one-click copy button for the result.

How to Use the Case Converter

Paste or type your text into the input box, then press one of the four buttons: UPPERCASE converts every letter to capitals; lowercase converts everything to small letters; Title Case capitalises the first letter of every word; and Sentence case capitalises only the first letter of each sentence. The result appears in the output box, and the Copy Result button copies it to your clipboard in one click.

Title Case here follows the practical convention of capitalising every word (proper strict title case leaves small words like "and" lowercase, but most people pasting headings want every word capitalised). Sentence case first lowercases everything, then capitalises the letter after each full stop, exclamation mark, question mark or ellipsis. Urdu, Arabic and other scripts without letter cases pass through unchanged.

How Each Conversion Works

UPPERCASE and lowercase are direct character mappings — every Latin letter is swapped for its counterpart. Title Case is a two-step operation:

Lowercasing first matters: pasting "hELLo WoRLD" and capitalising first letters would give "HELLo WoRLD" without the normalisation step. Sentence case similarly lowercases first, then capitalises the first letter of the text and any letter following sentence-ending punctuation. Both preserve numbers, punctuation and spacing exactly.

Worked Example

Input: "tHE qUICK bROWN fOX. jUMPS oVER tHE lAZY dOG."

Notice how Title Case capitalises "Over" and "The" while Sentence case leaves them lowercase — the same input, two different jobs, which is why knowing when to use each matters.

When to Use Each Case — What Basic Converters Don't Explain

Three professional notes. First, essays and assignments: use Title Case for your title and Sentence case for everything else — markers notice. Second, coding: most languages are case-sensitive, so paste variable names through lowercase to kill accidental capitals that cause bugs. Third, SEO titles and meta descriptions: Google displays them in Sentence case style; pasting an ALL-CAPS headline into a meta description looks spammy in search results and can hurt click-through rates.

Limitations

The converter is mechanical, not intelligent: Title Case capitalises every word, including "and", "the" and "of", which strict style guides keep lowercase — adjust those by hand for formal publishing. It cannot detect proper nouns, so "iphone" becomes "Iphone" rather than "iPhone" in Title Case. Sentence case splits on punctuation, so abbreviations like "e.g." may trigger unwanted capitals. And as noted, scripts without letter cases (Urdu, Arabic, Chinese) are unaffected by design.

Guides for This Tool

Case is a correctness issue anywhere text is measured or filed — including the property world, where the square feet to square meters guide keeps listing copy and converted areas in the same consistent format agents and portals expect.

Frequently Asked Questions

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