Ever typed a paragraph in CAPS LOCK by accident? Need to convert a heading to Title Case? Want to change variable names from camelCase to snake_case? A text case converter saves you from retyping everything.
This guide covers all text case types, when to use each, and how to convert between them using ToolsArena's free tool.
Convert Text Case Instantly — Free Online Tool
UPPERCASE, lowercase, Title Case, camelCase, snake_case — one click. No signup.
All Text Case Types Explained
| Case Type | Example | Common Use |
|---|---|---|
| UPPERCASE | HELLO WORLD | Headings, acronyms, emphasis |
| lowercase | hello world | URLs, email, casual text |
| Title Case | Hello World | Book titles, headlines |
| Sentence case | Hello world | Normal sentences, body text |
| camelCase | helloWorld | JavaScript variables |
| PascalCase | HelloWorld | Class names, React components |
| snake_case | hello_world | Python variables, databases |
| kebab-case | hello-world | CSS classes, URL slugs |
| CONSTANT_CASE | HELLO_WORLD | Constants, env variables |
How to Convert Text Case (Step-by-Step)
- Open the tool: Go to ToolsArena Case Converter
- Paste your text: Paste or type any text in the input box
- Choose the case: Click the button for the case you want
- Copy result: Click Copy to copy the converted text
Conversion happens instantly as you type or paste.
Case Conversion for Developers
| Language | Variables | Functions | Classes | Constants |
|---|---|---|---|---|
| JavaScript / TypeScript | camelCase | camelCase | PascalCase | UPPER_SNAKE |
| Python | snake_case | snake_case | PascalCase | UPPER_SNAKE |
| Java | camelCase | camelCase | PascalCase | UPPER_SNAKE |
| CSS | kebab-case | n/a | n/a | n/a |
| Go | camelCase | PascalCase (exported) | PascalCase | PascalCase |
| SQL | snake_case | snake_case | n/a | UPPER_SNAKE |
Migrating Python (snake_case) to JavaScript (camelCase)? ToolsArena converts in seconds.
Title Case Rules: What Gets Capitalized?
Words That Stay Lowercase
- Articles: a, an, the
- Short prepositions: in, at, by, for, of, on, to
- Conjunctions: and, but, or, nor
Always Capitalized
- First and last word of the title
- Nouns, verbs, adjectives, adverbs
- Words longer than 4 letters
Example: "the quick brown fox jumps over the lazy dog" becomes "The Quick Brown Fox Jumps Over the Lazy Dog"
How to Fix Accidental CAPS LOCK Text
Method 1: ToolsArena (Easiest)
- Copy your ALL CAPS text
- Paste in ToolsArena Case Converter
- Click "Sentence case" or "lowercase"
- Copy the fixed text back
Method 2: Microsoft Word
Select text, press Shift+F3 to cycle through cases
Method 3: Google Docs
Select text, Format, Text, Capitalization, choose your case
How to Use the Tool (Step by Step)
- 1
Open Case Converter
Go to ToolsArena Case Converter — free, no signup.
- 2
Paste your text
Type or paste any text into the input box.
- 3
Choose your case
Click the button for UPPER, lower, Title, Sentence, camelCase, or snake_case.
- 4
Copy the result
Click Copy to copy the converted text to your clipboard.
Frequently Asked Questions
How to convert UPPERCASE to lowercase?+−
Paste text in ToolsArena Case Converter and click lowercase. Or in Word, press Shift+F3.
How to convert text to Title Case?+−
Use ToolsArena Case Converter — paste text and click Title Case. It handles the rules automatically.
What is camelCase?+−
camelCase capitalizes the first letter of each word except the first, no spaces: helloWorld. Used for JavaScript and Java variables.
How to change text case in Word?+−
Select text and press Shift+F3 to toggle between UPPERCASE, lowercase, and Title Case.
What is the difference between Title Case and Sentence case?+−
Title Case capitalizes most words: "The Quick Brown Fox." Sentence case only capitalizes the first word: "The quick brown fox."
How to convert snake_case to camelCase?+−
Paste snake_case text in ToolsArena Case Converter and click camelCase: my_variable_name becomes myVariableName.
Is there a keyboard shortcut to change text case?+−
In Word: Shift+F3. In Google Docs: Alt+Format then Text then Capitalization. In VS Code: Ctrl+Shift+P then Transform.
How to fix text typed in CAPS LOCK?+−
Copy the text, paste in ToolsArena Case Converter, click Sentence case, copy the fixed version back.
Convert Text Case Instantly — Free Online Tool
UPPERCASE, lowercase, Title Case, camelCase, snake_case — one click. No signup.
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