Case Converter

Type or paste your text into the box above, then click the case you want. The buttons along the top cover everyday writing (Sentence case, lower case, UPPER CASE, Title Case and Capitalized Case), names for code (camelCase, PascalCase, snake_case, CONSTANT_CASE, kebab-case, Train-Case, dot.case and path/case) and two playful ones, aLtErNaTiNg cAsE and iNVERSE cASE. The text in the box changes in place, and the button you used last stays highlighted.

As soon as there is text in the box, a panel called Every case at a glance appears underneath. It shows the first 300 characters in all 15 cases at once, so you can compare them before you choose. Click Copy on any row and the whole text, converted to that case, goes to your clipboard while the box itself stays as it is.

This case converter online runs entirely in your browser on a phone, tablet or computer. Nothing is uploaded, there is no Convert button to wait for, and once the page has loaded it keeps working without an internet connection.

Here is what each button does. The everyday cases use the sentence the quick brown fox jumps over the lazy dog, the code cases use user account ID, and the two playful cases use Hello World.

Title Case is where most quick fixes fall short. Putting a capital on every word is easy; knowing which small words to leave in lower case is the hard part, and the answer depends on the style guide you follow. Pick Chicago, AP, APA or MLA next to Title case style, then click Title Case. Your choice is remembered in this browser for next time.

As a title case converter online, the tool applies the rules that all four guides share. The first and last word of a title always get a capital, even when they are small words such as a or to. The word straight after a colon, an em dash or the end of a sentence starts a new phrase and gets a capital too, so Star Wars: a new hope becomes Star Wars: A New Hope.

Every line is treated as its own title. Paste a list of chapter names or blog headings, one per line, and each line gets a capital on its first and last word. Hyphenated words get a capital on each part, apart from small words in the middle, so step-by-step guide becomes Step-by-Step Guide in Chicago style.

Names and brands are left alone. A word written in capitals or with a capital inside it, such as NASA, iPhone, eBay or McDonald, keeps exactly the letters you typed. The flip side is that text typed entirely in capitals stays in capitals, because every word looks like an acronym. Click lower case first, then Title Case, and put the capitals back on real acronyms by hand.

The table shows which words the tool keeps in lower case in the middle of a title. Words that are not listed, including nouns, verbs, adjectives, adverbs and pronouns, always get a capital, even short ones such as Is, Be, It and His.

In this tool Chicago and MLA give the same result, and so do AP and APA. The one difference between the two pairs is prepositions of four letters or more: Chicago and MLA keep every preposition small, while AP and APA capitalise longer ones such as With, From and Over.

Publishers, schools and journals often add their own exceptions on top of a guide. Convert first, then adjust the one or two words your house style treats differently. That is still far quicker than capitalising a long list of headings by hand.

Sentence case means writing a heading or a line the way you would write an ordinary sentence: a capital on the first word and small letters after that. Many websites, apps and style guides now prefer it for headings, because it is quick to read and avoids arguments about small words.

Click Sentence case and the tool lowercases the text, then capitalises the first letter of the text, the first letter after a full stop, question mark or exclamation mark followed by a space, and the first letter of every new line. The Hindi full stop (।) also ends a sentence. A lone i becomes I, so i think so turns into I think so.

Because every word is lowercased first, names and acronyms lose their capitals: Anna at NASA becomes anna at nasa. Use this sentence case converter online for text that was typed in capitals or in Title Case, then put back the capitals on names, places and brands. Abbreviations with a full stop, such as e.g. or Dr., can make the next word start with a capital too.

UPPER CASE turns every letter into a capital and leaves digits, spaces and punctuation alone. It is the right choice for short things meant to stand out: a sign, a label, a product code, a postcode, a booking reference or a one-word warning. Long passages in capitals are hard to read and can come across as shouting, so keep them short.

This upper case converter online uses your browser's own Unicode rules, so accented letters come out right: é becomes É, ñ becomes Ñ and ü becomes Ü. The German ß becomes SS. Greek and Cyrillic letters get their capital forms, while scripts without capitals, such as Chinese, Arabic and Hindi, are left as they are.

Need capitals inside a spreadsheet column or a Word file instead? The section on Word, Excel and Google Docs below shows how to do it in those programs.

lower case does the opposite: every capital becomes a small letter. It is the quickest fix for a paragraph typed with Caps Lock on, a heading pasted from a site that styles everything in capitals, or a list of email addresses and tags that should be all small letters.

The lower case converter online is also a useful first step before Title Case. Text that arrives in capitals stays in capitals under Title Case, because every word looks like an acronym, so press lower case first and then Title Case. Sentence case and Capitalized Case lowercase the text for you, so they need no first step.

Accented letters and letters from other alphabets are lowercased too, with the same Unicode rules your browser uses everywhere else. Digits, symbols and emoji are not changed.

You do not always need a separate tool. Word, Excel and Google Docs can each change case on their own, with limits worth knowing. Here is how to convert case to uppercase, lowercase or a capital on each word in each of them.

Office programs are fine for capitals and small letters, but none of them knows AP, APA, Chicago or MLA title case, and none of them makes camelCase or snake_case. Here each of those is one click, and the preview panel shows all 15 versions at once. Switch the Title case style and the preview updates straight away, so you can see which guide gives the title you want.

The tool also works on text from anywhere: a subject line in your email app, a field in a content management system, a column header from a spreadsheet, a list of names in a chat. Paste, click, copy and paste back. There is nothing to install, no formula to fill down and no paste-as-values step afterwards.

For a spreadsheet column that keeps changing, the formulas in Excel or Google Sheets still make sense, since they update with the data. For one-off jobs, and for anything that needs a style guide or a code style, the tool above is quicker.

Programming languages do not allow spaces in names, so developers join words together and use capitals or symbols to show where each word starts. camelCase starts with a small letter and capitalises every word after it: userAccountId. PascalCase, sometimes called upper camel case, capitalises the first word too: UserAccountId.

This camel case converter online splits your text into words before it joins them again. Spaces, hyphens, underscores, dots, slashes and other punctuation all mark a break, and so does a capital letter that follows a small letter or a digit. A run of capitals is read as an acronym: getHTTPResponse is read as get, HTTP and Response, which gives getHttpResponse in camelCase.

That means you can move between code styles freely. Paste a snake_case name, click camelCase, and you get the camelCase version; paste a phrase such as Number of active users and you get numberOfActiveUsers. Each line is converted on its own, so a list of 20 field names, one per line, becomes 20 variable names in one click.

Numbers count as their own word, so version 2 update becomes version2Update in camelCase and Version2Update in PascalCase. Letters with accents are kept rather than stripped, so check that your language allows them in names before you use them.

snake_case writes every word in small letters and joins them with underscores: user_account_id. It is the usual style for variables and functions in Python and Ruby, for column names in many databases and for file names that must not contain spaces. Paste a heading, a sentence or a camelCase name and this snake case converter online turns it into a clean name, with punctuation removed.

CONSTANT_CASE, also called screaming snake case, is the same with capitals: USER_ACCOUNT_ID. Use it for constants and environment variables. kebab-case uses hyphens instead of underscores (user-account-id) and is common for URL slugs, CSS class names and command-line options. Train-Case capitalises each word and joins them with hyphens (User-Account-Id), the shape of HTTP headers such as Content-Type.

dot.case (user.account.id) suits settings keys and translation files, and path/case (user/account/id) is handy for folder paths and routes. All of these drop punctuation, so an apostrophe splits a word: don't becomes don_t. Delete apostrophes first if you would rather have dont.

For URL slugs, remember that accented letters are kept, so café menu becomes café-menu in kebab-case. Some sites prefer plain letters in their addresses; edit those by hand after converting.

aLtErNaTiNg cAsE switches between small and capital letters, starting with a small one: hello world becomes hElLo WoRlD. Only letters are counted, so spaces and punctuation do not break the pattern. People use it for jokes, memes and the mocking tone it is known for online.

iNVERSE cASE swaps every letter: capitals become small letters and small letters become capitals. Its most useful job is fixing text typed with Caps Lock on by accident: hELLO wORLD turns back into Hello World in one click.

Every case works with letters from any alphabet, not only A to Z. French, Spanish, German, Polish, Turkish, Vietnamese and other languages with accents convert correctly, and so do Greek, Cyrillic and Armenian, which have capitals of their own.

Some writing systems, including Chinese, Japanese, Korean, Arabic, Hebrew, Hindi and Thai, have no capital letters. The everyday cases pass text in those scripts through unchanged, while any Latin words mixed in still change. The code cases are built for alphabets with separate letters; in scripts that write vowels as signs attached to letters, such as Hindi, a word can be split at those signs, so check the result.

Letters whose capital depends on the language, such as the Turkish dotted and dotless i, follow your browser's language setting. With a Turkish browser, i becomes İ in UPPER CASE; with most other languages it becomes I.

A text case converter online free of sign-ups is the kind of tool you reach for many times a week without thinking about it. These are the jobs people use it for most.

This is a case converter free to use with no account, no sign-up and no limit on how often you use it. Paste a single word or a whole chapter; there is no fixed length limit, though very long texts take a moment longer on older phones.

Your text never leaves your device. Every conversion is done by code running in your browser, and nothing you type or paste is sent to us. That makes it safe for drafts, private messages and code you would rather not paste into an online service.

Once the page has loaded, the tool keeps working without an internet connection, which is handy on a train or a plane. The Title case style and the Also remove extra spaces setting are remembered in this browser, but the text itself is not saved: reloading the page or closing the tab clears it, so copy or download your result first.

Need to check the length of your text as well? Word Counter shows words, characters, reading time and readability. Working with code? JSON Formatter tidies and checks JSON in your browser, and Lorem Ipsum Generator gives you placeholder text for layouts. For files, PDF to Text pulls the text out of a PDF, and Word to PDF turns a finished document into a PDF anyone can open.