13 case formats in one text box. Paste, click, copy.
Turn plain words into tiny, raised, mirrored and symbol text you can paste anywhere.
No-fuss tools for age, sleep, time and money, plus a strong password maker.
Paste your text, choose a format, copy the result. 13 case styles, from uppercase and lowercase to camelCase and snake_case, with instant conversion. Nothing ever leaves your browser.
Last updated: October 30, 2026
Case Converter does one job and does it quickly. There are no settings to learn, no account to create and nothing to install. If you can paste text, you can use it.
Drop your text into the box. Type it fresh, paste it from a document, or copy a paragraph from a web page. There is no length limit, so a headline and a whole chapter work the same way.
Click one of the 13 format buttons. The result appears immediately, and you can switch between formats as often as you like to compare how each one looks.
Read the output panel. Names, acronyms and brand spellings sometimes need a quick manual touch-up, and spotting them takes a few seconds on screen rather than a full retype.
Press Copy to send the text to your clipboard, or download it as a plain .txt file. Then paste it wherever it belongs: an email, a CMS, a spreadsheet or a code editor.
Each format below is one click away in the converter. Choose the one that matches where your text is going, and press “Try it” to load an example straight into the tool.
Capitalizes the first letter of each sentence and lowercases the rest. The classic fix for text typed with Caps Lock on.
Converts capital letters and caps to lowercase in one click. Ideal for URL slugs, hashtags, file names and identifiers where capitals cause trouble.
Converts text to uppercase by making every letter a capital letter. Use it to highlight a warning, a label or a short heading that has to stand out.
Capitalizes the first letter of every word with no exceptions for articles or prepositions. Handy for names, labels and menu items.
Alternates lower and upper case letter by letter. A playful style popular for memes and casual social posts.
Capitalizes major words and keeps short articles, prepositions and conjunctions lowercase, the way headlines are styled.
Swaps letters for full-width Unicode characters, giving an airy, spaced-out look for bios, banners and posts.
Swaps the case of every letter: capitals become lowercase and lowercase letters become capitals. Handy for fixing text typed with the Shift key the wrong way round.
Joins words with no spaces and capitalizes every word after the first. The standard style for variable and function names in JavaScript and Java.
Like camelCase, but the first word is capitalized too. Common for class names, React components and type names.
Lowercases words and joins them with underscores. Standard in Python and Ruby, and for database column names.
Lowercases words and joins them with hyphens. The usual choice for URL slugs, CSS class names and file names.
Uppercases words and joins them with underscores. Used for constants and environment variables.
Need to change capital letters to lowercase, or lowercase to uppercase? The case converter does both in one click, in either direction, on any amount of text.
Click UPPER CASE to convert any text to uppercase. Every letter becomes a capital letter, which suits headings, warnings, labels and short emphasis. Paste text in lowercase, mixed case or sentence case and the result is the same: all capitals. For a page built just for this, open the uppercase converter.
Click lower case to change capital letters to lowercase. It fixes text typed with Caps Lock on, turns an all-caps heading into plain lowercase, and prepares slugs, hashtags and file names. Click Sentence case instead if you want the first letter of each sentence capitalized again. There is also a dedicated lowercase converter.
You can switch between UPPER CASE and lower case as many times as you like. Your original text stays in the input box, so nothing is lost when you change format and you can compare the results side by side.
The two names are often used interchangeably, but they follow different rules. Capitalized Case simply raises the first letter of every word, so “a day in the life” becomes “A Day In The Life.”
Title Case is more selective. It capitalizes the major words and leaves small articles, conjunctions and short prepositions in lowercase, which is why the same phrase reads “A Day in the Life.” Headlines, book titles and blog posts usually call for Title Case; names, labels and menu items often suit Capitalized Case better.
Publishers disagree about the small print, so there is no single correct answer. If you are writing for a school, journal or newsroom, follow its own style guide. For blog posts, product pages and slides, consistency matters more than which guide you pick.
In every guide, the first and last words of a title are capitalized. Our Title Case button follows the short-word rule shared by AP and APA.
Retyping text because of a capitalization slip is a small chore that happens constantly. Here is where the converter earns its place in a normal working day.
Rescue a paragraph typed with Caps Lock on, standardize headings across a long draft, or switch a list of titles between Title Case and sentence case before sending it to a client. What used to be a ten-minute cleanup becomes a single click.
Lowercase a column of values before comparing them, normalize labels in a spreadsheet export, or prepare slugs, tags and file names. Pasting plain text in and out keeps hidden formatting from sneaking into your data.
Format essay titles, bibliography entries and headings consistently, and fix notes copied from lecture slides that arrived in all capitals. You spend your time on the argument instead of the shift key.
Give a bio or caption some personality with alternating case or wide text, or tidy up a batch of hashtags in one pass. Try a few styles side by side and keep the one that fits your brand.
Plenty of text tools ask you to sign in, cap your word count or upload your content to a server. This one is built around the opposite idea: open the page, paste, convert, leave.
Convert a single line or a full manuscript. Nothing is truncated and nothing is gated behind an upgrade.
Conversion runs in your browser with JavaScript. Your text is not uploaded, stored or shared.
The output updates as you click, so you can compare formats without waiting or reloading.
Send the result to your clipboard in one press, or save it as a .txt file for later.
Phone, tablet or laptop, in any modern browser, with nothing to install or update.
The Chrome extension converts selected text on any page without opening this site at all.
Sentence case lowercases everything before it capitalizes sentence starts, so words like London, NASA or iPhone need to be restored by hand. A quick read-through catches them.
Line breaks are preserved, and each new line is treated as the start of a sentence or title. Put one heading per line to convert a whole list at once.
Full-width characters are great for a bio or a banner, but they can be harder for search engines and screen readers to interpret. Avoid them for body copy and links.
The result is plain text. Convert the case here, then add bold, links and styles in your editor so that formatting never gets mixed into the conversion.
Select text on any web page, right-click, and choose a case. The free Chrome extension brings the converter to every tab you open.
Once your text is in shape, there is a small tool for most of the jobs that come next. Every one is free and works the same way: open, paste, copy.
Paste it into the converter and be done in a click.
Back to the converterShort answers to what people ask most. Anything missing? The tool itself is the fastest way to find out.
What does a case converter do?
It changes the capitalization of text you have already written. Paste your text, press a format button, and the converter rewrites it in one of 13 formats, from uppercase, lowercase, sentence case and title case to developer styles such as camelCase and snake_case, without changing the words themselves.
Is the case converter free to use?
Yes. It is free, needs no account or sign-up, and has no daily limits. You can convert as much text as you like, as often as you like.
Does the tool save or share my text?
No. The conversion runs inside your browser using JavaScript, so your text is not sent to a server or stored anywhere. When you close or refresh the page, the text is gone.
What is the difference between Title Case and Capitalized Case?
Capitalized Case raises the first letter of every word. Title Case follows headline rules: it capitalizes major words and keeps small articles, conjunctions and short prepositions lowercase, except at the start and end of the title.
Is there a limit on how much text I can convert?
There is no character limit. Very large documents may take a moment longer on an older device, but the tool will not cut your text off or ask you to upgrade.
What happens to numbers, punctuation and emoji?
They stay exactly as you typed them. Only letters change case, so numbers, symbols, punctuation and emoji pass through untouched. Wide Text is the exception: it also converts standard punctuation to its full-width equivalent.
Can I use the converter on my phone or tablet?
Yes. The page adapts to any screen size and works in current mobile browsers with nothing to install. On a desktop, the Chrome extension adds a right-click shortcut as well.
How do I convert to uppercase?
Paste your text into the box and click UPPER CASE. Every letter becomes a capital letter at once. You can then copy the result or download it as a .txt file.
How do I change capital letters to lowercase?
Paste the text and click lower case. All capital letters, including text typed with Caps Lock on, are converted to lowercase. If you want proper sentences afterwards, click Sentence case instead.
Can I switch between upper case and lower case?
Yes. Your original text stays in the input box, so you can click UPPER CASE, lower case or any other format as often as you like and compare the results.
Does the case converter work with accents and other languages?
Yes for scripts that have upper and lower case, such as accented Latin, Greek and Cyrillic: for example CAFÉ becomes café. Sentence case currently capitalizes the first letter of a sentence only for Latin letters. Scripts without case, such as Chinese, Japanese or Arabic, stay unchanged.
Why did Sentence case lowercase names and acronyms?
Sentence case first makes the whole text lowercase and then capitalizes the start of each sentence and the word I. Names, places and acronyms such as NASA are therefore lowercased and need a quick manual fix. Abbreviations that end in a full stop, such as e.g., can also trigger a capital on the next word.
Can I use wide text on social media?
Many apps display full-width characters, but some fonts and platforms do not, and screen readers may read them poorly. Do not use wide text for anything that must be accessible, and test it where you plan to post it.
What is the difference between camelCase, snake_case and kebab-case?
All three join words without spaces. camelCase capitalizes each word after the first (myVariableName), snake_case joins lowercase words with underscores (my_variable_name), and kebab-case joins them with hyphens (my-variable-name). Use camelCase in JavaScript, snake_case in Python and databases, and kebab-case for URLs and CSS classes.
What does Inverse Case do?
It swaps the case of every letter: capitals become lowercase and lowercase letters become capitals, so Hello World becomes hELLO wORLD.