Text Case Converter

What Is a Text Case Converter?

A text case converter changes the capital and small letters in your text without retyping it. Paste your words, press a button, and the text becomes upper case, lower case, title case or another style. It is useful when Caps Lock was on by mistake, when a heading needs to follow a style guide, or when you need a variable name in the style a programming language expects.

How to Use the Text Case Converter

1. Type or paste your text into the box, or press Paste.
2. Press the case you want. The text in the box changes right away.
3. Not happy with the result? Press Undo to go back, then try another case.
4. Press Copy text or Download to use the result.

Letter Cases Explained

Sentence case

Capitalizes the first letter of each sentence and makes the rest lowercase. A new sentence starts after a full stop, question mark or exclamation mark followed by a space, and at the start of each line. A lone "i" becomes "I". It suits normal paragraphs, emails and web page headings.

lower case and UPPER CASE

Lower case turns every letter into a small letter. Upper case turns every letter into a capital. Numbers and punctuation do not change.

Capitalized Case

Capitalizes the first letter of every word, including small words such as "of" and "the". It is quick and consistent, but it is not the same as title case.

Title Case

Capitalizes the main words of a title and keeps short words such as "a", "and" and "of" in lowercase, except at the start, at the end, and after a colon. Style guides differ, so choose one:

• AP: lowercases short articles, conjunctions and prepositions, and capitalizes any word of four or more letters.
• APA: capitalizes words of four or more letters and lowercases shorter minor words.
• Chicago and MLA: lowercase articles, coordinating conjunctions and prepositions whatever their length. The tool uses a list of common prepositions.

For example, "crypto profit calculator" becomes "Crypto Profit Calculator", which is the name of the Crypto Profit Calculator on Lumara's crypto site, a tool that works out the gain or loss on a trade. Always read a title over once, because rules have exceptions.

aLtErNaTiNg cAsE and InVeRsE CaSe

Alternating case switches between small and capital letters, letter by letter. Inverse case flips every letter: capitals become small and small become capitals. They are mostly used for style and humour.

Code and Data Cases

Programmers use naming styles to join several words into one name. Paste a phrase, or a list with one name per line, and the tool converts each line on its own. It also splits names that are already joined, so XMLHttpRequest and first_name are both understood.

• camelCase: userFirstName, common for variables in JavaScript and Java.
• PascalCase: UserFirstName, common for class and component names.
• snake_case: user_first_name, common in Python and database columns.
• CONSTANT_CASE: USER_FIRST_NAME, common for constants.
• kebab-case: user-first-name, common in CSS and web addresses.
• dot.case: user.first.name, common in settings files.

For a full web address, kebab-case is only the start. Accents, small words, length limits and non-Latin letters are handled by the Text to Slug Converter.

Keeping Names and Abbreviations

When you change case, names and abbreviations can lose their capitals, so "nasa" and "iphone" would come out wrong. The option to keep common names and abbreviations restores a built-in list that includes acronyms such as NASA, UK and PDF, brands such as iPhone and YouTube, finance and tax abbreviations such as TDS, VAT, GST, ROI and BTC, the days of the week, most months, and the languages this site supports. A lone "i" and contractions such as "i'm" become "I" and "I'm". For example, "crypto tds calculator" becomes "Crypto TDS Calculator", the name of Lumara's Crypto TDS Calculator, which shows the 1% TDS taken from a crypto sale in India and the amount you receive.

Add your own terms under Your own terms to keep, one per line, such as a company name or a product name. They keep their exact capitals, and multi-word terms such as "New York" work too. The list is deliberately short and cannot know every name, so check the result. Words that are also ordinary words, such as "may" and "march", are left alone for this reason.

Clean-Up Tools

• Remove extra spaces: collapses repeated spaces and trims the ends of each line.
• Remove line breaks: joins all lines into one paragraph.
• Remove empty lines: deletes blank lines and keeps the rest.

Tips for Better Results

• Use sentence case for most web headings and body text, and title case for formal titles.
• Scripts such as Arabic, Hebrew and Chinese have no capital letters, so case buttons leave those letters unchanged. They still work on any Latin words in the same text.
• Some languages have special rules. For example, Turkish treats the letter i differently, so check Turkish text.
• The tool changes only the text in the box, so keep a copy of anything you cannot retype.

Frequently Asked Questions

How do I change uppercase to lowercase?

Paste your text and press lower case. To get normal capitals back in sentences, press Sentence case instead.

What is the difference between sentence case and title case?

Sentence case capitalizes only the first word of each sentence and names. Title case capitalizes the main words of a title.

Which title case style should I use?

Use the style your publisher, school or company requires. If none is required, AP is a sound default for headlines.

Can I undo a conversion?

Yes. Press Undo to step back through your last changes in this session.

Why did a word keep its capitals?

It is on the built-in list or in your own terms. Turn off the option, or remove the term, to convert it normally.

Does it work with Arabic and other languages?

It works with any language that has capital letters, such as French, Spanish, Russian and Greek. Scripts without capitals are left unchanged.

Is my text sent or saved?

The conversion runs in your browser. The tool does not send or save your text. The page also loads a cookie banner and an advertisement from third-party services, described in our Privacy Policy.