Case Converter Tool
Result:
How the Case Converter Tool Works
This tool applies different text transformation rules to your input. Uppercase converts every letter to capitals. Lowercase makes everything small letters. Title case capitalizes the first letter of each word (with smart handling for articles and prepositions). Sentence case capitalizes only the first letter of each sentence.
For coding formats, camelCase removes spaces and capitalizes the first letter of each word except the first. Snake_case replaces spaces with underscores and converts to lowercase. Kebab-case uses hyphens instead of spaces. Toggle case flips every letter (uppercase becomes lowercase and vice versa). Alternating case switches between upper and lower for each character.
UPPERCASE = text.toUpperCase()
lowercase = text.toLowerCase()
Title Case = Each Word → Capitalize First Letter
camelCase = Remove Spaces + Capitalize Each Word (skip first)
When Should I Use Title Case vs Sentence Case?
Use title case for headlines, article titles, section headers, and email subject lines. It makes text feel more formal and important. Use sentence case for body text, descriptions, and casual content. Sentence case is easier to read in longer paragraphs and feels more conversational. Most social media posts work better with sentence case unless you’re writing a headline or announcement.
What’s the Difference Between camelCase, snake_case, and kebab-case?
These are coding conventions. camelCase is common in JavaScript, Java, and Swift (example: userName, totalPrice). snake_case appears in Python, Ruby, and databases (example: user_name, total_price). Kebab-case is used in URLs, CSS classes, and file names (example: user-name, total-price). Pick the style that matches your programming language or naming convention.
Why Does My Title Case Look Wrong?
Standard title case has nuanced rules. Small words like “a,” “an,” “the,” “in,” “on,” “at,” “for,” “and,” “but,” and “or” should stay lowercase unless they’re the first or last word. This tool applies those rules automatically. If you need every single word capitalized regardless of grammar (like for design mockups or logos), use the basic title case button or manually adjust after conversion.
Can I Convert Text with Numbers and Special Characters?
Yes. Numbers and symbols stay exactly as they are. Only letters get converted. So “Product-123!” becomes “PRODUCT-123!” in uppercase or “product-123!” in lowercase. For coding formats (camelCase, snake_case, kebab-case), special characters except spaces are preserved where they make sense.
What If My Text Has Multiple Languages?
The tool handles Unicode properly, so it works with accented characters (café → CAFÉ), Cyrillic, Greek, and other alphabets. Some languages don’t have uppercase/lowercase distinctions (like Chinese or Japanese), so those characters remain unchanged. Mixed-language text converts the parts that have case variations and leaves the rest alone.
Case Conversion Examples
| Input Text | Format | Output |
|---|---|---|
| hello world | UPPERCASE | HELLO WORLD |
| HELLO WORLD | lowercase | hello world |
| hello world | Title Case | Hello World |
| hello world | Sentence case | Hello world |
| user profile name | camelCase | userProfileName |
| User Profile Name | snake_case | user_profile_name |
| User Profile Name | kebab-case | user-profile-name |
| Hello World | tOGGLE cASE | hELLO wORLD |
Should I Use This or Just Retype Everything?
If you have more than a sentence or two, this tool saves serious time. Accidentally wrote an entire email in caps lock? Paste it here and fix it in one click. Need to convert a list of items to snake_case for a database? Done in seconds. Retyping is error-prone and slow, especially for longer text or lists with consistent formatting needs.
Does Case Matter for SEO or Readability?
For SEO, search engines treat uppercase and lowercase as the same (except in URLs where case can matter). For readability, mixed case (sentence case or title case) is easier on the eyes than all caps. ALL CAPS TEXT FEELS LIKE SHOUTING and is harder to scan. Use uppercase sparingly for emphasis or headlines, not for body text.
What’s Alternating Case Good For?
Alternating case (aLtErNaTiNg) is mostly used for memes, sarcasm, or informal online communication. It’s the text equivalent of a mocking tone. Not useful for professional or formal content, but it has its place in casual internet culture. Some people also use it for creative usernames or stylized text in design projects.