Case Converter: Change Text to Uppercase, Lowercase and Title Case
Paste your text and change its case with one click. This free case converter turns text into UPPERCASE, lowercase, Title Case, Sentence case, Capitalize Each Word, aLtErNaTiNg case, and tOGGLE cASE. It also converts to camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE for code. It works on any amount of text, keeps your line breaks, and runs in your browser, so nothing you paste is uploaded.
Use it to fix text typed with caps lock on, format headlines, clean up pasted data, or name variables the way your code style requires.
Use the tool12 case types
Writing cases and code cases in one place.
Title Case styles
APA, Chicago, AP, MLA or simple.
Undo history
Step back through up to 50 changes.
Private by design
Your text never leaves your browser.
Paste your text and press a case button: UPPER CASE, lower case, Title Case, Sentence case, camelCase, snake_case and more. The text changes at once, keeps its line breaks, and you can undo, copy or download it.
Key Takeaways
- Press a button to change the case of all your text at once. Numbers, spaces and punctuation stay as they are.
- Title case styles differ on short words. Pick APA, Chicago, AP, MLA or Simple to match the guide you follow.
- Five code cases (camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE) split words at spaces, symbols and capital letters.
- A language option handles Turkish and other special letter rules. Keep acronyms leaves words such as NASA and SEO unchanged.
- The converter runs in your browser, so nothing you paste is uploaded or stored.
How to Change Text Case Online
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1STEP 1 Type or paste your text into the box.
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2STEP 2 Press the button for the case you want. The text changes at once.
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3STEP 3 For Title Case, pick a style such as APA or Chicago if you need to follow a style guide.
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4STEP 4 Press Undo if you are not happy, or press another button to try a different case.
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5STEP 5 Copy the result and paste it where you need it.
Uppercase to Lowercase Converter and Lowercase to Uppercase
The most common jobs are the simplest. To change capital letters to lowercase, paste your text and press lower case. To change lowercase to uppercase, press UPPER CASE. Numbers, spaces and punctuation stay the same, and only letters change.
People often need this after typing with caps lock on by mistake, copying a heading from a PDF that was set in capitals, or cleaning a list of names and email addresses so they match in a database.
Case Types Explained With Examples
| Case | Result for: the quick brown fox | Best used for |
|---|---|---|
| UPPERCASE | THE QUICK BROWN FOX | Labels, acronyms, short emphasis |
| lowercase | the quick brown fox | Email addresses, tags, URLs |
| Title Case | The Quick Brown Fox | Headlines, book and article titles |
| Sentence case | The quick brown fox | Normal sentences, UI text |
| Capitalize Each Word | The Quick Brown Fox | Names, addresses, product lists |
| aLtErNaTiNg | tHe QuIcK bRoWn FoX | Memes and playful posts |
| tOGGLE | tHE qUICK bROWN fOX | Flipping the case of every letter |
| camelCase | theQuickBrownFox | JavaScript and Java variables |
| PascalCase | TheQuickBrownFox | Class names, components |
| snake_case | the_quick_brown_fox | Python variables, database columns |
| kebab-case | the-quick-brown-fox | URLs, CSS classes, file names |
| CONSTANT_CASE | THE_QUICK_BROWN_FOX | Constants and environment variables |
Title Case Converter: Which Style Should You Use?
Title case sounds simple, but style guides disagree on which words to capitalize. All of them capitalize the first and last word and the main words. They differ on short words such as prepositions and conjunctions. The converter lets you pick a style, and shows the difference clearly on the same sentence.
| Style | Short word rule | Result for: the quick brown fox jumps over the lazy dog |
|---|---|---|
| Simple | Capitalize every word | The Quick Brown Fox Jumps Over The Lazy Dog |
| APA | Lowercase articles, short conjunctions and prepositions of three letters or fewer | The Quick Brown Fox Jumps Over the Lazy Dog |
| Chicago | Lowercase articles, conjunctions and prepositions of any length | The Quick Brown Fox Jumps over the Lazy Dog |
| AP | Lowercase short words, capitalize words of four letters or more | The Quick Brown Fox Jumps Over the Lazy Dog |
The difference is the word over. A four letter preposition is capitalized under APA and AP, and lowercase under Chicago. If you are writing for a publication, a school or a company, use the style it asks for. If there is no rule, pick one and use it everywhere.
Headline and title tips
- Always capitalize the first and last word, even if they are short words like a or to.
- Capitalize nouns, verbs, adjectives and adverbs.
- Keep acronyms in capitals, such as SEO or USA.
- Check brand names that use unusual capitals, such as iPhone or eBay, because a converter may change them.
- For web page titles, many writers prefer sentence case because it is easier to read.
Sentence Case Converter
Sentence case capitalizes only the first letter of each sentence, and proper nouns when they are marked. The converter lowercases everything first, then capitalizes the first letter after each full stop, question mark and exclamation mark, and the start of the text. Use it to fix a paragraph that was typed all in capitals.
After converting, read through the text for names, places and the word I, which a converter cannot always know to capitalize. A quick pass takes a few seconds and avoids mistakes.
camelCase, snake_case and kebab-case Converter
Programmers use naming styles to make variable and file names readable. A name cannot contain spaces in most languages, so words are joined with a capital letter or a symbol.
| Style | Example | Where it is common |
|---|---|---|
| camelCase | userAccountName | JavaScript, Java, Swift variables and functions |
| PascalCase | UserAccountName | Classes and components in C#, TypeScript and React |
| snake_case | user_account_name | Python, Ruby and database column names |
| kebab-case | user-account-name | URLs, CSS class names and file names |
| CONSTANT_CASE | USER_ACCOUNT_NAME | Constants and environment variables |
Paste a phrase with spaces, or a name that is already in one style, and press the button for the style you want. The tool splits words at spaces, symbols and capital letters, so userAccountName becomes user_account_name in one step.
How to Change Case in Word, Google Docs and Excel
You can change case inside common programs, and this tool is useful when you are not in one of them.
| Program | How to change case |
|---|---|
| Microsoft Word | Select the text and press Shift + F3 to cycle through lowercase, UPPERCASE and Capitalize Each Word. Or use the Change Case button on the Home tab. |
| Google Docs | Select the text, then choose Format, Text, Capitalization, and pick lowercase, UPPERCASE or Title Case. |
| Excel and Google Sheets | Use the formulas =UPPER(A1), =LOWER(A1) and =PROPER(A1) to change a cell, then copy the results. |
| Anywhere else | Paste the text into this converter, change the case and paste it back. |
When Should You Avoid All Caps?
Text in all capitals is harder to read, because letters lose the shape that helps the eye recognise words. It can also look like shouting in emails and messages. Screen readers usually read normal case without problems, but some may spell out words in capitals letter by letter. Use all caps for short labels, warnings and acronyms, and use sentence case for everything else.
Things a Case Converter Cannot Know
- Names. Names such as McDonald, de la Cruz or iPhone use special capitals. Check them after you convert.
- Acronyms. A converter turns NASA into Nasa in title case if the rule says so. Restore acronyms by hand.
- The letter I. When you convert to lowercase, the word I becomes i. Fix it after converting.
- Special languages. In German, the letter ß becomes SS in uppercase. In Turkish, the letters i and I have dotted and dotless forms. Choose the language option when it matters.
Is My Text Private?
Yes. The conversion runs in your browser, and the text you paste is not sent to a server or saved. Close the tab and it is gone, so you can use the converter for emails, names and private notes.
More Free Text Tools
Turn a title into a clean web address with the Text to Slug tool. Count what you have converted with the Word Counter. Remove repeated words from a list with the Duplicate Word Remover. Compare the original and converted text using the Text Compare tool. Flip a headline backwards for a puzzle with the Text Reverser.
FAQs
How do I convert text to uppercase or lowercase?
Paste your text into the box and press UPPER CASE or lower case. The text changes straight away and keeps its spacing and line breaks. Numbers and punctuation stay as they are. Then copy the result and paste it where you need it. You can press Undo if you want the original back.
How do I change all caps to lowercase?
Paste the text typed in capital letters, press lower case to convert every letter to small letters, then press Sentence case if you want the first letter of each sentence capitalized. This is the quickest way to fix text typed with caps lock on, or a heading copied in capitals.
What is title case?
Title case capitalizes the first and last word and the main words of a title, such as nouns, verbs and adjectives. Short words like a, the, and and of are usually lowercase unless they come first or last. Style guides such as APA, Chicago and AP differ on how to treat short prepositions.
What is the difference between title case and sentence case?
Title case capitalizes most words, as in The Quick Brown Fox Jumps Over the Lazy Dog. Sentence case capitalizes only the first word and proper nouns, as in The quick brown fox jumps over the lazy dog. Titles often use title case, while normal text, web interfaces and many modern headlines use sentence case.
What is camelCase and when do I use it?
camelCase joins words together with no spaces and capitalizes every word after the first, as in userAccountName. Programmers use it for variable and function names in JavaScript, Java and Swift. For classes and components, PascalCase capitalizes the first word too, and Python usually prefers snake_case.
How do I change case in Microsoft Word?
Select the text and press Shift + F3 to cycle through lowercase, uppercase and capitalize each word. You can also open the Home tab and use the Change Case button, which has sentence case, lowercase, uppercase, capitalize each word and toggle case. In Excel, use the UPPER, LOWER and PROPER formulas.
Does the converter keep my line breaks and punctuation?
Yes. Only the letters change case. Line breaks, spaces, numbers and punctuation stay exactly where they are, so lists, paragraphs and addresses keep their layout. The programming styles are different, since camelCase, snake_case and kebab-case remove spaces and join words by design.
Is the case converter free and private?
Yes. It is free with no sign up and no limit on how much text you convert. The conversion runs in your browser, so your text is not sent to a server or stored. Close the tab, and the text is gone, which makes it safe for private emails and names.
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