Free Online Case Converter

How to Use the Case Converter

1. Paste your text into the box above — a headline, a paragraph, or a whole document.
2. Click the case you want. The text converts instantly.
3. Copy the result with the Copy button and paste it wherever you need it.

The five conversions:

• UPPERCASE — every letter capitalized. Use sparingly: for warnings, labels, or short emphasis.
• lowercase — every letter lowercase. Useful for normalizing data or URLs.
• Title Case — first letter of each major word capitalized, following standard headline rules (small words like "a," "the," and "of" stay lowercase mid-title).
• Sentence case — only the first letter of each sentence capitalized, like normal writing.
• aLtErNaTiNg case — alternating upper and lower for playful, meme-style text.

When to Use Each Case

UPPERCASE

All caps shouts. Reserve it for short labels, warning messages, abbreviations, or form fields that require it (like some license or serial-number inputs). Long passages in all caps are harder to read and can feel aggressive in emails and messages.

Title Case

The standard for book titles, article headlines, and presentation slide titles in US style guides. Our converter follows the common rule: capitalize the first and last word always, and lowercase articles (a, an, the), short conjunctions (and, but, or), and short prepositions (in, on, at, to, of) in the middle.

Sentence case

Increasingly popular for modern headlines, especially in UK media and tech blogs. It reads calmer than Title Case and is easier to get right, since you only capitalize the first word and proper nouns. Many brands now prefer it for a friendly tone.

Sentence Case Converter Online

Looking specifically for a sentence case converter online? You are already on one — click the "Sentence case" button above and any text converts instantly: only the first letter of each sentence is capitalized, exactly like normal writing.

Sentence case deserves its own spotlight because it has quietly become the default style of the modern web:

• UK media style. The BBC, The Guardian, and most British publications use sentence case for headlines — "Government announces new policy", not "Government Announces New Policy".
• Tech and product writing. Google, Apple, and Microsoft style guides all prefer sentence case for buttons, headings, and notifications — it reads calmer and friendlier.
• Easier to get right. Title case has a dozen small-word rules to memorize; sentence case has one rule: capitalize the first word (and proper nouns). Fewer rules, fewer mistakes.
• Better for long headlines. In all-caps or title case, long headlines become walls of capital letters; sentence case keeps them scannable.

How our sentence-case conversion works: the tool lowercases everything, then capitalizes the first letter of the text and the first letter after every period, exclamation mark, or question mark. Proper nouns ("London", "Maria") will be lowercased along with everything else, so give those a quick manual fix after converting — a small price for a one-click transformation.

Fixing ALL-CAPS text? Pasting shouty text and hitting "Sentence case" is the fastest way to normalize it — far quicker than retyping or hand-editing each word.

Common Case-Fixing Scenarios

• Accidentally typed with Caps Lock on? Paste the text and hit "Sentence case" or "lowercase" to fix it in one click instead of retyping.
• Spreadsheet data in random cases? Normalize names and addresses to Title Case before importing.
• Headline from a wire service in all caps? Convert to Title Case or Sentence case to match your publication's style.
• Essay title needs proper capitalization? Title Case handles the small-word rules for you.
• Styling social media bios? Alternating case gives that playful look without retyping every letter.

Title Case Rules Worth Knowing

Major US style guides (APA, Chicago, AP) agree on the basics:

1. Always capitalize the first and last word of the title, no matter what they are.
2. Capitalize all major words: nouns, verbs, adjectives, adverbs, and pronouns.
3. Lowercase articles (a, an, the), coordinating conjunctions (and, but, or, for, nor), and short prepositions (in, on, at, to, of, by, for) — unless they open or close the title.
4. Capitalize both parts of hyphenated words ("Well-Known") in most styles.

Our converter applies rules 1–3 automatically. For formal publishing, give the result a quick proofread — style guides have edge cases no converter can fully resolve.

Frequently Asked Questions