Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, Capitalized Case, inverse case, and normalized spacing — all generated at once from a single block of text.
Results from this calculator are estimates provided for general informational purposes only, based on formulas, rates, and standards commonly accepted as of 2026. Figures may differ slightly from other calculators or professional sources due to rounding methods, differing assumptions, or regional regulations, and rules may change over time. Always consult a qualified professional — such as a financial advisor, healthcare provider, or other relevant specialist — before making decisions based on these results.
UPPERCASE
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG. IT WAS THE BEST OF TIMES, IT WAS THE WORST OF TIMES.
Characters
97
No spaces
77
Words
21
Sentences
2
Text stats
What is a Case Converter?
A case converter rewrites text into a different capitalization style without changing the letters themselves — turning "hello world" into "HELLO WORLD", "Hello World", or "hello world." depending on what the format calls for. It's a common step in writing and publishing workflows: headlines need Title Case, body copy needs Sentence case, and code or data fields sometimes need consistent UPPERCASE or lowercase formatting.
This tool generates every supported format at once from a single block of text, so you can compare them side by side instead of running the same text through several separate tools.
Every format
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG. IT WAS THE BEST OF TIMES, IT WAS THE WORST OF TIMES.
the quick brown fox jumps over the lazy dog. it was the best of times, it was the worst of times.
The Quick Brown Fox Jumps Over the Lazy Dog. It Was the Best of Times, It Was the Worst of Times.
The quick brown fox jumps over the lazy dog. It was the best of times, it was the worst of times.
The Quick Brown Fox Jumps Over The Lazy Dog. It Was The Best Of Times, It Was The Worst Of Times.
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG. IT WAS THE BEST OF TIMES, IT WAS THE WORST OF TIMES.
the quick brown fox jumps over the lazy dog. it was the best of times, it was the worst of times.
the quick brown fox jumps over the lazy dog. it was the best of times, it was the worst of times.
About These Parameters
- Text
- The text you want converted. It can be a single word, a sentence, or a full paragraph — every format is regenerated from whatever you paste in.
- Format
- Each card shows a different case format applied to the same input text. Click a format's name to open its dedicated page.
How Case Conversion Works
Title Case and "Minor Words"
Title Case capitalizes the first letter of every major word but leaves short function words — articles ("a", "the"), coordinating conjunctions ("and", "or"), and short prepositions ("of", "in", "to") — lowercase, unless one of them is the very first or last word of the text. This follows the same convention style guides like AP and Chicago use for headlines and titles, e.g. "A Tale of Two Cities" (not "A Tale Of Two Cities").
Sentence Case Limitations
Sentence case capitalizes the first letter after every period, question mark, or exclamation point, and lowercases everything else. It cannot tell the difference between a proper noun and an ordinary word, so a name like "paris" or "john" will stay lowercase unless you capitalize it by hand afterward — the same limitation every automated sentence-case tool has.
Normalizing Whitespace
Pasted text — especially from PDFs, emails, or other documents — often carries extra spaces, tabs, or line breaks. The normalize formats collapse any run of whitespace down to a single space (or, for the double-space format, two spaces after sentence-ending punctuation, a convention some formal typing styles still use), without altering the letters or punctuation.
Example
The input "the quick brown fox" becomes "THE QUICK BROWN FOX" in UPPERCASE, "The Quick Brown Fox" in Title Case, and "The quick brown fox" in Sentence case — the letters never change, only which ones are capitalized.
Frequently Asked Questions
Does Sentence case capitalize proper nouns?
No — it only capitalizes the first letter of each sentence. Names, places, and other proper nouns need to be capitalized manually afterward, the same limitation every automated case tool has.
Which words stay lowercase in Title Case?
Short articles ("a", "an", "the"), coordinating conjunctions ("and", "but", "or"), and short prepositions ("of", "in", "to", "by") stay lowercase — unless they're the first or last word of the text, in which case they're always capitalized.
Does this tool add or remove punctuation?
No — case conversion only changes letter capitalization. The normalize formats adjust spacing around existing punctuation, but no format adds periods, commas, or other punctuation marks that weren't already in your text.