Case Converter - Change Text to Uppercase, Lowercase, Title Case & More
What is a Case Converter?
A case converter is a text transformation tool that changes the capitalization of letters in your text. Whether you have text in ALL CAPS that needs to be lowercase, need to capitalize titles properly, or want to fix inconsistent capitalization, a case converter instantly transforms text between different case formats.
Our case converter supports multiple text case formats:
- Sentence case: Capitalizes the first letter of each sentence. Example: "This is sentence case. It looks natural."
- lowercase: Converts all letters to lowercase with no capital letters. Example: "this is all lowercase text"
- UPPERCASE: Converts all letters to capital letters. Example: "THIS IS ALL UPPERCASE TEXT"
- Title Case: Capitalizes the first letter of each major word. Example: "This Is Title Case Format"
- camelCase: Removes spaces and capitalizes first letter of each word except the first. Example: "thisIsCamelCase"
- PascalCase: Like camelCase but capitalizes the first word too. Example: "ThisIsPascalCase"
- snake_case: Replaces spaces with underscores and uses lowercase. Example: "this_is_snake_case"
- CONSTANT_CASE: Snake case with uppercase letters. Example: "THIS_IS_CONSTANT_CASE"
- kebab-case: Replaces spaces with hyphens and uses lowercase. Example: "this-is-kebab-case"
- Capitalize Each Word: Every word starts with a capital letter. Example: "Every Word Is Capitalized"
- aLtErNaTiNg CaSe: Alternates between lowercase and uppercase letters for stylistic effect
- InVeRsE CaSe: Swaps uppercase to lowercase and vice versa
All conversions happen instantly in your browser with complete privacy—no text is uploaded to servers.
Why Use a Case Converter?
📝 Fixing Accidentally Caps-Locked Text
The most common use case—you accidentally typed with Caps Lock on:
- Entire paragraphs typed in ALL CAPS that need to be normal text
- Email messages accidentally sent in uppercase looking like shouting
- Documents where Caps Lock was on for sections
- Social media posts typed in all caps needing proper capitalization
- Form submissions where users typed in wrong case
Instead of retyping everything, convert it instantly to sentence case or lowercase.
📰 Title Formatting for Headlines and Headers
Professional titles require proper capitalization:
- Blog post titles need title case for professionalism
- Article headlines must follow title capitalization rules
- Book titles and chapter headings require proper formatting
- Email subject lines look better in title case
- Presentation slide titles need consistent capitalization
- Website H1 tags and headers benefit from title case
Convert "this is my blog post" to "This Is My Blog Post" instantly.
💻 Programming and Code Formatting
Developers need specific case formats for different programming contexts:
- camelCase for JavaScript variables and functions
- PascalCase for class names and React components
- snake_case for Python variables and functions
- CONSTANT_CASE for constants and environment variables
- kebab-case for CSS classes and URLs
- Converting database field names between conventions
Quickly convert "user profile picture" to "userProfilePicture" or "USER_PROFILE_PICTURE".
📊 Data Cleaning and Standardization
Databases and datasets need consistent capitalization:
- Customer names in all caps need to be converted to proper case
- Product names with inconsistent capitalization need standardization
- Address data from various sources needs uniform formatting
- Email addresses should be lowercase for consistency
- CSV imports with mixed case data need normalization
- User-submitted forms with random capitalization
Clean messy data by converting "JOHN SMITH" to "John Smith" or "john smith".
🌐 SEO and URL Formatting
Search engine optimization requires specific case formats:
- URL slugs should be in lowercase kebab-case
- Meta titles need proper title case capitalization
- Image file names benefit from lowercase-with-hyphens
- Anchor text looks more professional in sentence case
- Category names need consistent capitalization
- Tag names should be standardized (usually lowercase)
Convert "My Amazing Blog Post" to "my-amazing-blog-post" for URLs.
📱 Social Media and Marketing
Social media content requires specific formatting:
- Hashtags typically use lowercase or camelCase for readability
- Post titles need title case for professional appearance
- Brand slogans require specific capitalization consistency
- Call-to-action buttons often use title case
- Instagram captions look better with proper sentence case
- Twitter/X posts benefit from correct capitalization
Ensure your social content looks professional with proper case formatting.
Understanding Different Text Cases
📖 Sentence case
Format: First letter of each sentence is capitalized, rest lowercase
Example: "This is sentence case. The second sentence also starts capitalized."
Best for: Regular paragraphs, body text, emails, natural-looking content
🔤 lowercase
Format: All letters in lowercase, no capitals
Example: "everything is in lowercase letters"
Best for: URLs, email addresses, hashtags, CSS classes, file names
🔠 UPPERCASE
Format: All letters in capitals
Example: "EVERYTHING IS IN UPPERCASE LETTERS"
Best for: Acronyms, constants in code, attention-grabbing headlines (use sparingly)
📰 Title Case
Format: First letter of each major word capitalized
Example: "This Is an Example of Title Case"
Best for: Blog titles, article headlines, book titles, headers
Note: Minor words (a, an, the, and, or, but) are typically lowercase unless first/last word, though styles vary
🐫 camelCase
Format: First word lowercase, subsequent words capitalized, no spaces
Example: "thisIsCamelCase"
Best for: JavaScript/Java variables, function names, JSON properties
🎯 PascalCase
Format: Every word capitalized, no spaces (like camelCase but first word too)
Example: "ThisIsPascalCase"
Best for: Class names, React components, C# conventions, type names
🐍 snake_case
Format: All lowercase with underscores replacing spaces
Example: "this_is_snake_case"
Best for: Python variables, database column names, Ruby variables
⚡ CONSTANT_CASE
Format: All uppercase with underscores replacing spaces
Example: "THIS_IS_CONSTANT_CASE"
Best for: Constants in code, environment variables, configuration values
🔗 kebab-case
Format: All lowercase with hyphens replacing spaces
Example: "this-is-kebab-case"
Best for: URLs, CSS classes, file names, HTML attributes
Step-by-Step: How to Convert Text Case
Paste Your Text
Copy the text you want to convert from any source—documents, websites, emails, forms—and paste it into the input field. Or type directly in the field. The converter works with text of any length.
Select Your Desired Case Format
Click the button for the case format you need: Sentence case, lowercase, UPPERCASE, Title Case, camelCase, PascalCase, snake_case, CONSTANT_CASE, or kebab-case. The conversion happens instantly.
Review the Converted Text
The converted text appears immediately in the output field. Check that the capitalization is exactly what you need. You can try different case formats by clicking different buttons to compare.
Copy the Result
Click the "Copy" button to copy the converted text to your clipboard. Paste it back into your document, code editor, website, or wherever you need properly formatted text.
Use Cases: When to Use Case Converter
⌨️ Fixing Caps Lock Mistakes
Scenario: You typed an entire email with Caps Lock on accidentally.
Problem: "HELLO, I WANTED TO FOLLOW UP ON OUR CONVERSATION..." looks like shouting and is unprofessional.
Solution: Paste into the converter, select "Sentence case," and get: "Hello, I wanted to follow up on our conversation..." Perfect professional tone without retyping.
📰 Blog Post Title Formatting
Scenario: You have a blog post title in inconsistent case: "how to improve your SEO in 2024"
Problem: Looks unprofessional and doesn't follow title capitalization conventions.
Solution: Convert to Title Case: "How to Improve Your SEO in 2024" for a professional, polished headline.
💻 Variable Name Conversion for Code
Scenario: Converting between programming languages with different naming conventions.
Problem: Python uses "user_profile_image" (snake_case) but you're porting to JavaScript which uses "userProfileImage" (camelCase).
Solution: Convert all variable names using the case converter to match your target language's conventions quickly.
📊 Database Import Cleaning
Scenario: Importing customer data where names are in all caps: "JOHN SMITH"
Problem: All-caps names look unprofessional in customer-facing interfaces and email communications.
Solution: Convert to Title Case ("John Smith") or sentence case before import for proper formatting in your system.
🔗 URL Slug Creation
Scenario: Creating SEO-friendly URLs from page titles.
Problem: Page title is "The Ultimate Guide to Digital Marketing" but URL needs lowercase-with-hyphens.
Solution: Convert to kebab-case: "the-ultimate-guide-to-digital-marketing" for a perfect URL slug.
📱 Social Media Hashtag Formatting
Scenario: Creating readable multi-word hashtags.
Problem: "#digitalmardketingtips" is hard to read; "#DIGITALMARKETINGTIPS" is shouty.
Solution: Convert to camelCase or PascalCase: "#digitalMarketingTips" or "#DigitalMarketingTips" for readability while maintaining the hashtag format.
📧 Email Address Normalization
Scenario: User submitted form with email in mixed case: "[email protected]"
Problem: Email lookups are case-sensitive in some systems; inconsistent case causes duplicate entries.
Solution: Convert to lowercase: "[email protected]" for database consistency and reliable matching.
📄 Document Consistency
Scenario: Multiple authors contributed to a document with inconsistent heading capitalization.
Problem: Some headers are title case, some sentence case, some all caps—looks unprofessional.
Solution: Convert all headers to Title Case for consistent, professional formatting throughout the document.
Programming Case Conventions by Language
| Language | Variables | Functions | Classes | Constants |
|---|---|---|---|---|
| JavaScript | camelCase | camelCase | PascalCase | CONSTANT_CASE |
| Python | snake_case | snake_case | PascalCase | CONSTANT_CASE |
| Java | camelCase | camelCase | PascalCase | CONSTANT_CASE |
| C# | camelCase | PascalCase | PascalCase | PascalCase |
| Ruby | snake_case | snake_case | PascalCase | CONSTANT_CASE |
| PHP | camelCase | camelCase | PascalCase | CONSTANT_CASE |
| Go | camelCase | PascalCase* | PascalCase | PascalCase |
| Rust | snake_case | snake_case | PascalCase | CONSTANT_CASE |
| CSS | kebab-case | N/A | kebab-case | N/A |
*Go uses capital letters for exported (public) identifiers and lowercase for unexported (private) ones.
Privacy and Security
🔒 Complete Privacy
All text conversion happens in your browser. Your text never leaves your device, is never uploaded to servers, and is never stored. Process confidential content safely.
🚫 No Data Collection
We don't log, analyze, or store any text you convert. No tracking of your content. Your text remains completely private.
💯 No Registration
No account, no email, no sign-up. Just paste text and convert instantly. Use unlimited times, completely free.
⚡ Instant Conversion
Processing is local with no server delay. See conversions happen instantly—no waiting, no loading.
Safe for Sensitive Content: Convert case in confidential documents, proprietary code, customer data, or private messages without any privacy concerns.
Start Converting Text Case Now
Our free case converter is ready to use at the top of this page. No download, no account, no limits. Simply paste your text and click the case format you need—conversion is instant.
Whether you're fixing caps lock mistakes, formatting titles, converting code conventions, cleaning database imports, or creating URLs, our case converter provides the fastest solution for all your text capitalization needs.
✨ Quick Start
- ✓Paste or type text into the field above
- ✓Click your desired case format button
- ✓See instant conversion to your chosen format
- ✓Copy the perfectly formatted result!
Frequently Asked Questions About Case Conversion
1. What's the difference between Title Case and Capitalize Each Word?
Title Case follows traditional title capitalization rules where minor words (a, an, the, and, or, but, in, on, etc.) are typically lowercase unless they're the first or last word. "Capitalize Each Word" capitalizes every single word including minor words. For example: Title Case = "The Art of Digital Marketing" vs. Capitalize Each Word = "The Art Of Digital Marketing". Title Case is more grammatically correct for headlines, while Capitalize Each Word is simpler but less traditional. For professional writing, use Title Case.
2. When should I use camelCase vs. PascalCase vs. snake_case?
The choice depends on your programming language and what you're naming. JavaScript/Java use camelCase for variables and functions ("myFunction"), PascalCase for classes ("MyClass"). Python uses snake_case for variables and functions ("my_function"), PascalCase for classes ("MyClass"). C# uses PascalCase for almost everything. Constants in most languages use CONSTANT_CASE ("MAX_SIZE"). For CSS and URLs, use kebab-case ("my-class-name"). Following your language's conventions makes code readable and prevents confusion. When in doubt, check your language's official style guide.
3. Does the converter handle special characters and numbers?
Yes! The converter handles letters (making them uppercase or lowercase), preserves numbers exactly as they are, keeps punctuation unchanged, and maintains special characters. For example, "hello-world 123!" converts to uppercase as "HELLO-WORLD 123!" — the hyphen, space, numbers, and exclamation point stay the same. For camelCase/PascalCase/snake_case conversions, special characters like hyphens and spaces are removed and replaced with the appropriate format (spaces to camelCase capitalization, spaces to underscores in snake_case, etc.).
4. Can I convert multiple paragraphs at once?
Yes, paste as much text as you want—single words, sentences, paragraphs, or entire documents. The converter processes all text at once, maintaining paragraph breaks and structure. Each paragraph, sentence, or word is converted according to the case format you choose while preserving line breaks and formatting structure. This is perfect for converting entire emails, documents, or articles in one go. There's no character limit—convert thousands of words instantly.
5. Will this change my punctuation or formatting?
No, only letter capitalization changes. Punctuation (periods, commas, quotes, exclamation points, etc.), spacing, line breaks, paragraph structure, and numbers all remain exactly as they were. The converter only modifies whether letters are uppercase or lowercase. If you have "Hello, World!" in your original text, converting to uppercase gives "HELLO, WORLD!" — the comma and exclamation point stay the same. This ensures your text structure and punctuation remain intact.
6. How do I fix text that was accidentally typed in all caps?
If you accidentally typed with Caps Lock on, paste the all-caps text into our converter and select "Sentence case" for normal text or "lowercase" if you want to start fresh. Sentence case gives you proper capitalization (first letter of each sentence capitalized, rest lowercase), which is usually what you want for emails, documents, and regular writing. This is much faster than retyping everything and gives you properly formatted text in one click. For formal documents or emails, sentence case looks professional and natural.
7. Can I use this for converting variable names when porting code?
Absolutely! When converting code between languages with different naming conventions (Python to JavaScript, for example), use our converter to quickly transform variable names. Convert "user_profile_image" (Python snake_case) to "userProfileImage" (JavaScript camelCase) or "UserProfileImage" (PascalCase for classes). This saves time when porting code and ensures consistent naming conventions. However, always verify the converted names make sense in context—automated conversion is fast, but manual review ensures correctness.
8. What's the best case format for URLs and slugs?
For URLs, use kebab-case (lowercase with hyphens): "my-blog-post-title". This is the SEO best practice because: (1) URLs are case-sensitive on some servers, lowercase avoids issues, (2) Hyphens are treated as word separators by search engines, (3) Kebab-case is readable both by humans and search engines, (4) It's the widely accepted standard for clean URLs. Avoid underscores in URLs (search engines treat them differently), spaces (get encoded as %20), and uppercase (can cause duplicate content issues). Our kebab-case converter creates perfect URL-ready slugs.
9. Does Title Case follow AP, Chicago, or APA style?
Our Title Case follows a general title capitalization format that capitalizes major words and is suitable for most purposes. Different style guides (AP, Chicago Manual of Style, APA) have slightly different rules about which minor words to capitalize. Our converter uses a balanced approach: capitalizes first and last words always, capitalizes major words (nouns, verbs, adjectives, adverbs), and typically capitalizes minor words for simplicity. For strict adherence to a specific style guide (especially for academic or publishing work), you may need to manually adjust certain words after conversion. For general use (blog posts, headlines, marketing), our Title Case works perfectly.
10. Can I convert text on mobile devices?
Yes, the case converter works perfectly on smartphones and tablets (iOS and Android). To use on mobile: (1) Copy or type text into the input field, (2) Tap the button for your desired case format, (3) See instant conversion, (4) Tap "Copy" to copy the result. The interface is fully responsive and touch-optimized for mobile screens. All processing happens locally on your device, so it works even with slow mobile connections. Perfect for quick text formatting on the go when you don't have access to a computer.
11. How do I create readable hashtags for social media?
For multi-word hashtags, use camelCase or PascalCase to make them readable. "#digitalmarketingtips" is hard to read, but "#digitalMarketingTips" (camelCase) or "#DigitalMarketingTips" (PascalCase) are much clearer. Twitter, Instagram, and other platforms preserve case in hashtags, so capitalizing each word improves readability without affecting hashtag functionality. Our converter makes this easy—paste "digital marketing tips," convert to camelCase, add the # symbol, and you get a readable hashtag. This improves engagement because users can quickly understand your hashtag's meaning.
12. Will this work with non-English text and accented characters?
Yes! The converter handles Unicode characters including accented letters (é, ñ, ü, etc.), Cyrillic, Greek, and other alphabets. For example, "RÉSUMÉ" converts to lowercase as "résumé" with accents preserved. "Привет" (Russian) converts between upper and lowercase correctly. However, some languages don't have uppercase/lowercase distinctions (Chinese, Japanese, Arabic), so conversion won't affect those characters—they'll remain unchanged. The converter is smart enough to handle international text correctly while preserving special characters and diacritical marks.
13. Can I batch convert multiple texts separately?
You need to convert texts one at a time—paste first text, convert, copy result, clear, paste next text, convert. While we don't offer batch file upload, conversion is instant so processing multiple texts takes just seconds per text. If you have many variable names or titles to convert, create a list (one per line), paste all of them, convert the entire list at once, then parse the results. For truly bulk conversion of hundreds of files, you might want to use command-line tools or scripts, but for typical use (5-20 items), our tool is fastest and easiest.
14. What happens to acronyms when converting to lowercase?
Acronyms convert just like any other text—they become lowercase. "NASA" becomes "nasa," "HTML" becomes "html." If you want to preserve acronyms in their uppercase form while converting surrounding text, you'll need to convert the text first, then manually fix the acronyms afterward. Alternatively, convert each section separately (convert non-acronym text while leaving acronyms as-is in your original). There's no automatic way to detect and preserve acronyms because the converter can't distinguish between acronyms and words you intentionally want in all caps.
15. Should email addresses be in lowercase?
Yes, it's best practice to store and use email addresses in all lowercase. While email addresses are technically case-insensitive ([email protected] and [email protected] go to the same inbox), storing them in lowercase prevents issues: (1) Prevents duplicate accounts from case variations, (2) Makes database queries simpler and more reliable, (3) Avoids confusion when users forget how they capitalized their email, (4) Is the universal standard for email storage. Convert all email addresses to lowercase before storing in databases or using for lookups. Our lowercase converter makes this easy for cleaning email lists.
16. How do I convert headings in a Word document?
To convert headings: (1) Copy all headings from your Word document, (2) Paste into our converter, (3) Select Title Case or your desired format, (4) Copy the converted headings, (5) Paste back into Word. For multiple headings, you can paste them all at once (one heading per line) and convert them together. This ensures consistent capitalization across all headings in your document. Much faster than manually capitalizing each heading, especially in long documents with dozens of headers. For final documents, consistent heading capitalization looks professional and polished.
17. What's alternating case and when would I use it?
Alternating case (aLtErNaTiNg CaSe) alternates between lowercase and uppercase for each letter, creating a sarcastic or mocking tone. It's primarily used in memes and informal social media to indicate sarcasm or mockery (based on the "Mocking SpongeBob" meme). Not appropriate for professional, academic, or business writing—only use for casual, humorous contexts where the sarcastic tone is intentional. Some variations alternate by word rather than letter. While our tool may offer this, remember it's strictly for informal, comedic purposes and will look unprofessional in any serious context.
18. Can I use this to fix product names in a database?
Yes! If your product database has inconsistent capitalization ("iPhone," "IPHONE," "iphone"), export the product names, convert to a consistent format (usually Title Case for product names), and reimport. This ensures consistency across your catalog, website, and customer-facing materials. However, be careful with brand names that have specific capitalization (iPhone, eBay, PayPal)—these should be manually corrected to match official branding after conversion. Our converter standardizes the format, but you may need to manually fix trademarked names that have unique capitalization.
19. Is my text private when using this converter?
Completely private. All case conversion happens in your browser using JavaScript—your text never leaves your device, never gets uploaded to servers, never gets logged, and never gets stored anywhere. The tool works offline once the page loads, proving nothing is transmitted. This means you can safely convert confidential documents, proprietary code, customer data, internal communications, or anything else without any privacy concerns. Your text stays on your device from start to finish. No accounts, no tracking, no data collection whatsoever.
20. Can I undo a conversion if I picked the wrong case format?
If you haven't copied the result yet, simply click a different case button to try another format—your original text is still in the input field. If you already copied and pasted the converted text somewhere, you can paste your original text back into the converter and try again. The tool doesn't have an "undo" button because it doesn't destructively modify text—it always creates new output while keeping your input intact. Best practice: always keep your original text somewhere safe (in your original document) until you're satisfied with the conversion. This way you can always start over if needed.
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