What this case converter does
This tool changes the capitalization of any text without retyping it. Paste your text, click a format, and the converted version appears instantly in the result box, ready to copy. It solves the two classics: discovering you typed a whole paragraph with Caps Lock on, and receiving an email or document WRITTEN ENTIRELY IN CAPITALS that you need to turn back into normal text.
Everything runs locally in your browser. Your text is never uploaded, stored, or logged, so it’s safe to paste emails, contracts, or draft chapters.
How to use it
- Type or paste your text into the Original text box.
- Click the format you need: UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg, or iNVERTED.
- The result updates live in the second box — keep editing the original and the conversion follows along.
- Hit Copy result and paste it wherever it goes.
Accented characters are handled correctly: “café” becomes “CAFÉ”, not “CAFE”.
The six formats, same input
Starting from My first blog:
| Format | Result | Typical use |
|---|---|---|
| UPPERCASE | MY FIRST BLOG | Acronyms, signage, legal headings |
| lowercase | my first blog | Tags, URLs, taming all-caps text |
| Title Case | My First Blog | Headlines, book and song titles |
| Sentence case | My first blog | Body text, modern web headings |
| aLtErNaTiNg | mY fIrSt BlOg | The mocking-meme voice in chats |
| iNVERTED | mY FIRST BLOG | Fixing text typed with Caps Lock on |
Worked example
Say a colleague sends you THE QUARTERLY REPORT IS DUE ON MONDAY — 37 characters, 7 words, 31 letters, all shouting. Click Sentence case and the tool first lowers everything, then capitalizes the first letter of the text and the first letter after each period, question mark, or exclamation point. You get The quarterly report is due on monday: of the 31 letters, 30 were lowered and only the opening T stayed capitalized. One manual touch-up remains — day names are proper nouns in English, so change “monday” back to “Monday” yourself. The tool can’t tell proper nouns from ordinary words.
When to use each format
Title Case is the traditional choice for headlines and titles in English, but style guides disagree on the details: AP style lowercases short prepositions and articles (“of”, “the”, “in”), while this tool capitalizes every word for simplicity — lowercase the minor words by hand if your style guide requires it. Sentence case has taken over much of the modern web (APA also requires it for most headings) because it’s easier to read and to apply consistently. UPPERCASE reads as shouting in emails and chats, so save it for acronyms and short labels. aLtErNaTiNg case exists almost entirely for sarcastic memes — use responsibly.
Frequently asked questions
How do I capitalize only the first letter of my text?
Use Sentence case. It lowercases everything, then capitalizes the very first letter plus any letter that follows a period, question mark, or exclamation point. That’s the standard for ordinary sentences and modern headings.
Should every word in a title be capitalized?
Depends on your style guide. Chicago and AP capitalize principal words but lowercase short articles, conjunctions, and prepositions; APA uses sentence case for most headings. This tool applies simple Title Case — every word — so adjust minor words to match whichever guide you follow.
What are camelCase and snake_case?
They’re programming naming conventions for writing multi-word identifiers without spaces. camelCase capitalizes each inner word, as in myNewVariable; snake_case joins words with underscores, as in my_new_variable. Related styles include PascalCase (MyNewClass) and kebab-case (my-web-page). This converter targets regular prose rather than code identifiers.
Is my text sent to a server?
No. The conversion runs entirely in your browser with JavaScript. Nothing is transmitted or saved, which makes the tool safe for confidential documents.