Case Converter
FREEChange the case of any text in one step. Paste or type it, pick UPPERCASE, lowercase, Sentence case, Title Case, tOGGLE or aLtErNaTiNg, and the result updates as you go. Copy it with one click. This case converter is free and needs no signup, and the page states your text stays in your browser.
How to Use the Case Converter
1. Paste or type your text into the input box.
2. Choose a case. The result updates as you type or paste, so there is no submit button.
3. Click the copy button to copy the converted text.
Case Converter Modes
| Mode | What it does | Example |
| UPPERCASE | Makes every letter a capital. | hello world → HELLO WORLD |
| lowercase | Makes every letter small. | HELLO WORLD → hello world |
| Sentence case | Capitalizes the first word of each sentence and leaves the rest lowercase. | it works. it is fast. → It works. It is fast. |
| Title Case | Capitalizes the main words and keeps small words lowercase, unless they come first or last. | the lord of the rings → The Lord of the Rings |
| tOGGLE | Flips the case of every letter. | Hello World → hELLO wORLD |
| aLtErNaTiNg | Alternates lowercase and uppercase letters. | aLtErNaTiNg |
Sentence Case Converter
Sentence case is how you normally write: the first word of each sentence starts with a capital, and everything else is lowercase. Choose it to change text to sentence case after pasting a heading, a note or a block that came in with the wrong capitals.
It does not know which words are names. "jane lives in new york" will not become "Jane lives in New York", because the tool does not correct proper nouns. Fix names and places by hand afterwards, or use Title Case if you are formatting a heading.
Title Case Converter
Title case capitalizes the main words in a title or headline. The title case converter keeps articles (a, an, the), short conjunctions (and, but, or) and short prepositions (such as at, by, in, of, on, to and with) in lowercase, unless the word is the first or last in the title. That gives results like "The Lord of the Rings", "A Tale of Two Cities" and "Gone with the Wind".
Different style guides draw this line in different places, as the next section explains.
AP Title Case and Other Style Guides
There is no single rule for title case. The main style guides disagree about longer prepositions and conjunctions:
| Style guide | Rule for prepositions and conjunctions | "with" and "from" |
| AP | Capitalize those of four letters or more. | With, From |
| APA | Capitalize all words of four letters or more. | With, From |
| Chicago | Lowercase prepositions, with limited exceptions. | with, from |
| MLA | Lowercase prepositions regardless of length. | with, from |
This converter lowercases a fixed list of small words, which includes "with". If you follow AP or APA, check four-letter words such as with, from and into by hand before you publish. Whichever guide you use, apply it to every heading on the page.
All Caps Converter and All Caps to Lowercase
For an all caps converter, choose UPPERCASE. It is useful for short items: a label, a warning, an acronym or a heading. Long passages in capitals are harder to read and tend to come across as shouting, so keep them brief.
To convert all caps to lowercase, choose lowercase. If you want normal sentences from text that arrived in capitals, convert it to lowercase first, then choose Sentence case. Check names, places and acronyms afterwards, because they will have been lowercased too.
What the Converter Leaves Alone
• Punctuation, numbers and symbols are kept as they are.
• Emojis are unchanged.
• Accented letters convert normally: é becomes É and ñ becomes Ñ. Greek and Cyrillic letters have case too.
• Scripts without case, such as Chinese, Japanese and Arabic, pass through unchanged, because they have no uppercase or lowercase to change.
Common Mistakes to Avoid
❌ Mistakes to Avoid
✓ Solution:
Setting body text in all caps. It slows reading. Reserve capitals for short labels and use Sentence case for paragraphs.
Mixing title case styles. If one heading follows AP and the next follows Chicago, the page looks inconsistent. Pick one style and use it everywhere.
Expecting Sentence case to fix proper nouns. The tool capitalizes the start of each sentence only. Names, places and brands need a manual check.
Flattening acronyms. Lowercase and Sentence case turn NASA into nasa or Nasa unless you restore it. Scan the output for acronyms before you copy it.
Applying case changes to languages without case. Chinese, Japanese and Arabic text has no capital letters, so converting it does nothing.
Frequently Asked Questions
Paste your text into the case converter and choose Sentence case. The first word of each sentence is capitalized and the rest is lowercase. Proper nouns are not corrected, so check names and places.
Not exactly. It keeps a fixed list of small words lowercase, including "with". AP capitalizes prepositions and conjunctions of four letters or more, so for AP headlines, review those words by hand.
Paste the text and choose lowercase. For proper sentences, run Sentence case on the result.
Paste the text and choose UPPERCASE.
No. It capitalizes the first word of each sentence only. "jane lives in new york" will not become "Jane lives in New York".
Yes for accented letters, Greek and Cyrillic, which convert normally. Chinese, Japanese and Arabic have no case, so they pass through unchanged.
The page states that everything runs in your browser and your text is not uploaded, stored or tracked.
Yes. It is free to use, with no signup.
Convert Your Text
Paste your text, pick a case, and copy the result. Read it through once before you use it.
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