Convert Case Online
Change text to UPPERCASE, lowercase, Title Case, Sentence case, and more in one click, plus camelCase, snake_case, and kebab-case for code. Free, instant, and private.
- 8 case styles
- Word & character count
- One-click copy
- No upload, fully private
Updated October 24, 2026 · By Identity Design
Text case
For developers
How to Convert Text Case
Three steps, done in seconds.
Paste your text
Type or paste any text into the box above. The word, character, and line counts update as you type.Choose a case
Click Sentence case, lower case, UPPER CASE, Capitalized Case, Title Case, or one of the developer styles.Copy the result
Click “Copy text” and paste it wherever you need. Use Undo to go back if you change your mind.
Text Case Styles Explained
- Sentence case: Only the first word of each sentence is capitalized.
- lower case: every letter is lowercase.
- UPPER CASE: EVERY LETTER IS CAPITALIZED.
- Capitalized Case: Every Word Starts With A Capital.
- Title Case: Major Words Are Capitalized, Like a Headline.
Case Styles for Developers
Programming languages and tools use specific naming conventions. Turn plain phrases into code-ready names:
- camelCase: userFirstName, used in JavaScript and Java
- snake_case: user_first_name, used in Python and SQL
- kebab-case: user-first-name, used in URLs and CSS
Why Use This Case Converter
Everything you need for fixing text in one place.
Instant conversion
Change the case of a single line or a full document with one click.
Smart Title Case
Keeps short words like “and” and “of” lowercase, the way editors write headlines.
Live counts
See characters, words, and lines as you type, which is handy for titles and meta descriptions.
Private by design
Your text stays in your browser. Nothing is uploaded or stored.
Frequently Asked Questions
What is title case?
Title case capitalizes the first letter of each major word, as in a headline or book title. Short words like a, an, the, and, of, and to stay lowercase unless they’re the first or last word. Style guides such as AP and Chicago differ slightly, so this tool follows the most common rules.
What is sentence case?
Sentence case capitalizes only the first word of each sentence (and the word “I”), while everything else is lowercase, just like normal writing. It’s popular for website headings, buttons, and email subject lines because it reads naturally.
What’s the difference between Capitalized Case and Title Case?
Capitalized Case makes the first letter of every word uppercase, including small words like “and” and “of”. Title Case keeps those small words lowercase, which is the standard for headlines and titles.
How do I change uppercase text to lowercase?
Paste your text into the box and click “lower case”. Every letter is converted instantly, and you can click “Copy text” to paste it anywhere. If you change your mind, the Undo button restores the previous version.
What are camelCase, snake_case, and kebab-case used for?
They’re naming styles used in programming. camelCase is common for JavaScript variables, snake_case is popular in Python and database columns, and kebab-case is used for URLs, file names, and CSS class names.
Does it work with languages other than English?
Yes, for languages that have uppercase and lowercase letters, such as Spanish, French, German, and Russian. Languages without letter case, such as Korean, Chinese, and Japanese, are left unchanged.
Is my text saved or uploaded anywhere?
No. All conversions happen in your browser, so your text is never sent to a server or stored. That makes it safe to use with private documents and unpublished writing.
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