Text Tools
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, or aLtErNaTiNg CaSe instantly. Fix text formatting in seconds with our free online case converter tool.
Use Case Converter to get instant results without uploads or sign-ups. Everything runs securely in your browser for fast, reliable output.
Your results will appear here.
About this tool
Convert text case instantly with our free case converter tool. Transform text to UPPERCASE, lowercase, Title Case, Sentence case, or alternating case with a single click. Perfect for fixing accidentally typed text with caps lock on, formatting titles and headings, preparing text for different platforms, or correcting case inconsistencies in documents.
Our case converter handles all common text case transformations: UPPERCASE converts all letters to capitals, lowercase converts everything to small letters, Title Case capitalizes the first letter of each word (following proper title capitalization rules), Sentence case capitalizes only the first letter of each sentence, and alternating case creates aLtErNaTiNg pAtTeRnS.
The tool is essential for content writers fixing formatting errors, developers preparing code comments, social media managers formatting posts, students fixing essay titles, and anyone needing quick text case transformations. All conversions happen instantly without page reloads, making bulk text formatting fast and efficient.
Your text stays completely private - all conversions happen in your browser with no data sent to servers. Use the tool as many times as needed with no character limits. Works on all devices and can be used offline.
Usage examples
Fix Caps Lock Mistake
Original: "tHIS IS MY IMPORTANT EMAIL"
Sentence case: "This is my important email". Title Case: "This Is My Important Email". lowercase: "this is my important email"
Format Blog Post Title
Original: "how to learn programming in 30 days"
Title Case: "How to Learn Programming in 30 Days". UPPERCASE: "HOW TO LEARN PROGRAMMING IN 30 DAYS"
Normalize User Input
Original: "JoHn SmItH" (messy input from form)
Title Case: "John Smith". lowercase: "john smith". UPPERCASE: "JOHN SMITH"
Create Attention-Grabbing Header
Original: "Limited time offer"
UPPERCASE: "LIMITED TIME OFFER". aLtErNaTiNg: "lImItEd TiMe OfFeR". Title Case: "Limited Time Offer"
Fix All-Caps Email
Original: "PLEASE REVIEW THE ATTACHED DOCUMENT ASAP"
Sentence case: "Please review the attached document asap". lowercase: "please review the attached document asap"
How to use
- Paste or type your text into the text area
- Select the desired case conversion type from the dropdown menu
- Options: uppercase, lowercase, title case, sentence case, alternating case
- Click "Run Tool" to convert the text instantly
- View the converted result and copy it with one click
- Use "Clear" to reset and convert new text
Benefits
- Instant text case conversion - results appear immediately
- Multiple case options - uppercase, lowercase, title, sentence, alternating
- No character limit - convert text of any length
- Preserves punctuation and numbers
- One-click copy button for easy use
- No registration required
- Complete privacy - processing done in browser
- Mobile-friendly interface
- Works offline after first load
- Free forever with no limitations
FAQs
What is the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of each major word (nouns, verbs, adjectives) while leaving articles (a, an, the), short prepositions (in, on, at), and conjunctions (and, but, or) lowercase unless they're the first word. Sentence case only capitalizes the first letter of each sentence and proper nouns, treating text like normal sentences.
How does the case converter handle special characters and numbers?
The case converter only affects alphabetic characters (A-Z, a-z). Numbers, punctuation marks, symbols, and special characters remain unchanged. For example, "test123!@#" becomes "TEST123!@#" in uppercase or "test123!@#" in lowercase.
Will converting to lowercase affect proper nouns?
Yes, converting to lowercase changes all letters including proper nouns. "New York" becomes "new york". If you need to preserve proper noun capitalization, use Sentence case instead, which keeps the first letter of sentences capitalized while lowercasing the rest (though it won't automatically recognize all proper nouns).
What is alternating case used for?
Alternating case (aLtErNaTiNg CaSe) is primarily used for emphasis, humor, or mockery in informal online communication, particularly in memes. It alternates between lowercase and uppercase letters. It's rarely used in professional contexts but popular in social media for comedic effect.
Does Title Case follow specific style guide rules?
Our Title Case follows common English title capitalization rules: capitalize the first and last words, and all major words (nouns, pronouns, verbs, adjectives, adverbs). Articles (a, an, the), short prepositions (in, on, of, at), and coordinating conjunctions (and, but, or, nor) are lowercase unless they're the first or last word.
Can I use this for code formatting?
Yes! Developers often use this tool to convert variable names, adjust code comments, or format strings. However, note that this tool doesn't follow specific code conventions like camelCase or snake_case - it only changes letter case. For programming-specific formatting, specialized code formatters are better.
How do I undo a case conversion?
Simply paste your original text back into the converter or use your browser's undo function (Ctrl+Z or Cmd+Z) if you're working in the text area. The tool doesn't save conversion history, so keep your original text if you might need to revert changes.
Is there a character limit?
No! Unlike many case converters that limit you to a few hundred characters, our tool handles text of any length. Convert entire documents, long articles, or bulk text without worrying about character limits.
Related tools
View all toolsCamel Case Converter
Convert text to camelCase, PascalCase, snake_case, kebab-case, or CONSTANT_CASE instantly. Perfect for programming variable names, API endpoints, and code formatting with our free case converter.
Text ToolsCharacter Counter
Count characters, words, sentences, and paragraphs instantly. Perfect for Twitter/X (280 chars), SMS (160 chars), meta descriptions (160 chars), and social media character limits.
Text ToolsCSS Beautifier & Formatter
Format and beautify CSS code instantly. Convert minified or messy CSS into clean, readable, properly indented code with our free CSS beautifier and formatter tool.
Text Tools