Which case do you need?
| Case | Example | Typical use |
|---|---|---|
| UPPERCASE | QUARTERLY REPORT | Short labels, signs, acronyms; reads as shouting in messages |
| lowercase | quarterly report | Tags, email addresses, a casual tone |
| Sentence case | Quarterly report for the board | Normal sentences; headings in many style guides and most apps |
| Capitalized Case | Quarterly Report For The Board | Names, book and film titles (with small words fixed by hand) |
| aLtErNaTiNg cAsE | qUaRtErLy rEpOrT | Jokes and memes — the “mocking” tone |
| iNVERSE cASE | qUARTERLY rEPORT | Undoing text typed with caps lock on |
| camelCase / PascalCase | quarterlyReport / QuarterlyReport | Variable and class names in JavaScript, Java, C# |
| snake_case / CONSTANT_CASE | quarterly_report / QUARTERLY_REPORT | Python names, database columns, constants |
| kebab-case | quarterly-report | Web addresses (URLs), CSS class names, file names |
How each conversion works
- Sentence case lowercases everything, then capitalizes the first letter of the text, the first letter after a period, question mark or exclamation point, and the first letter of each new line.
- Capitalized Case capitalizes the first letter after a space, a hyphen, a slash or an opening bracket or quote, so “mary-jane” becomes “Mary-Jane”. A letter after an apostrophe stays small, so “don’t” doesn’t turn into “Don’T”.
- Alternating case switches between small and capital on every letter, skipping spaces and punctuation, so the pattern never breaks.
- The programming cases split the text into words at anything that isn’t a letter or a digit, then join them: camelCase and PascalCase without separators, snake_case and CONSTANT_CASE with underscores, kebab-case with hyphens.
Letters with accents and other alphabets work too: “école” becomes “ÉCOLE”, “straße” becomes “STRASSE” (the usual capital form of ß), and Greek or Cyrillic text changes case the same way.
What to check by hand
A converter only knows letters, not meaning. After converting to lowercase or Sentence case, put the capitals back on names, places, brands and acronyms — “nasa”, “paris” and “iphone” won’t fix themselves — and on the pronoun “I” in English. Title case in style guides is also stricter than capitalizing every word: AP, Chicago and APA styles keep short words such as a, and, of and the lowercase unless they come first, so “The Lord Of The Rings” should be edited to “The Lord of the Rings”.
Fixing text typed with caps lock on
Text such as “hELLO, i AM LATE” is easiest to repair with Sentence case, which gives “Hello, i am late”, followed by a quick pass for names and “I”. If only the capitals are reversed — every lowercase letter should be capital and the other way round — iNVERSE cASE flips them back in one step.
Your text stays private
The conversion runs as JavaScript in your browser. Nothing you paste is sent to a server or stored, and reloading the page clears it.
Frequently asked questions
How do I change uppercase to lowercase?
Paste the text above and copy the “lowercase” line. To keep a capital at the start of each sentence, copy “Sentence case” instead.
What is the difference between Sentence case and Title Case?
Sentence case capitalizes only the first word of each sentence (plus names). Title case capitalizes the main words of a title. The “Capitalized Case” line capitalizes every word; style guides then lowercase short words like “of” and “the”.
Does it work with accents and other languages?
Yes. Case changes follow each letter’s Unicode rules, so French, Spanish, German, Polish, Greek and Cyrillic text convert correctly. Scripts without capital letters, such as Arabic, Chinese or Japanese, stay unchanged.
Is there a keyboard shortcut instead?
In Microsoft Word, Shift+F3 cycles a selection between lowercase, UPPERCASE and Capitalized. Google Docs has Format → Text → Capitalization. Most other apps have no shortcut, which is where a converter helps.
Is my text stored anywhere?
No. Everything happens in your browser tab; the text isn’t uploaded, logged or saved.
Last updated: October 14, 2026