Case Converter – Free Online Text Case Changer
Instantly convert text to uppercase, lowercase, title case, sentence case, camelCase, snake_case, PascalCase, kebab-case, alternating case and more. Perfect for writers, developers, students and content creators.
Instant conversion · 100% private · No signup · Works on mobile & desktop
Free Case Converter — Change Text Case Instantly
Whether you're a writer who needs clean title headings, a developer formatting variable names, a student fixing capitalization in an essay, or someone who typed an entire paragraph in caps lock by mistake — this free online case converter handles it all in one click. No retyping, no copying text into Word, no formatting gymnastics. Paste your text, pick a style, and you're done.
How to Use This Case Converter
Type or Paste
Enter any text into the input box on the left
Pick a Case Style
Click any of the 10 conversion buttons above
See the Result
Converted text appears instantly on the right
Copy & Use
Click "Copy Result" and paste wherever you need it
All Supported Case Conversions
| Case Style | Example Output | Best Used For |
|---|---|---|
| UPPER CASE | THE QUICK BROWN FOX | Headings, emphasis, acronyms |
| lower case | the quick brown fox | Informal text, code strings |
| Title Case | The Quick Brown Fox | Article titles, headings, book names |
| Sentence case | The quick brown fox | Normal writing, blog content, captions |
| camelCase | theQuickBrownFox | JavaScript, Java variables & functions |
| PascalCase | TheQuickBrownFox | Class names, React components, C# |
| snake_case | the_quick_brown_fox | Python variables, database column names |
| kebab-case | the-quick-brown-fox | CSS classes, URL slugs, HTML attributes |
| aLtErNaTiNg | tHe qUiCk bRoWn fOx | Mocking tone, social media humor |
| iNVERSE cASE | tHE QUICK BROWN FOX | Toggling existing capitalization |
Key Features
Instant Conversion
Results appear the moment you click a button — no waiting, no loading
Developer Cases
camelCase, PascalCase, snake_case and kebab-case built for programmers
Use Output as Input
Chain conversions — convert output further with a single click
Live Text Stats
Words, characters, sentences and paragraphs shown in real time
100% Private
Everything runs in your browser — your text never leaves your device
Mobile Friendly
Works on Android, iPhone, tablets — no app required
Sentence Case vs Title Case — What's the Difference?
This is one of the most searched questions for case converters, and the answer matters for writers. Sentence case treats your text like a normal sentence — only the first word gets a capital letter, along with any proper nouns. It reads naturally and is the standard for body copy, captions and social media posts. Title case capitalizes the first letter of every significant word, skipping minor words like "and", "or" and "the". It's the standard for article titles, book names, headings and anything that needs to look formally headed.
camelCase, PascalCase, snake_case and kebab-case for Developers
Programmers deal with naming conventions daily and the rules vary by language and framework. camelCase is the go-to for variables and functions in JavaScript, TypeScript and Java — the first word is lowercase and each subsequent word starts with a capital. PascalCase (also called UpperCamelCase) is identical except every word starts with a capital, making it standard for class names, constructor functions and React components. snake_case uses underscores as word separators and keeps everything lowercase — it's the Python community standard and common in database column names and REST API fields. kebab-case uses hyphens and is native to CSS class names, HTML data attributes, URL slugs and file names on case-sensitive systems.
Our converter handles all four formats correctly, stripping punctuation and splitting on spaces, underscores, hyphens and existing capital letters so you can convert between any of these formats cleanly.
How to Convert Uppercase to Lowercase Without Retyping
If you've ever accidentally typed an entire paragraph with Caps Lock on, you know the frustration. Rather than deleting and retyping everything, simply paste the text into this tool and click "lower case". The entire block converts instantly, preserving all punctuation, numbers and spacing — only the letter cases change. The same works in reverse: paste any lowercase text and click "UPPER CASE" to capitalize everything in one go.
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