Case Converter UPPERCASE, lowercase, Title Case, camelCase & more
Transform your text into any case in one click. Choose from 12 built-in conversions including Title Case, Sentence case, camelCase, snake_case, kebab-case, and CONSTANT_CASE. Live preview, Unicode-safe, and everything runs privately in your browser.
Choose a case
Click any card to apply that conversion. The preview shows how your first few words will look.
Case analytics
See the letter-case composition of your output and how the conversion changed the text.
Live case gallery
Every conversion applied to your actual text, side by side. Click any card to apply it.
Quick actions
One-click transforms applied to the input text.
Examples
Click any example to load it into the input and apply a case.
A case converter transforms text into different capitalisation styles — uppercase, lowercase, title case, sentence case, and programming-friendly formats like camelCase and snake_case. It saves time and prevents typos when formatting headings, filenames, variables, and social posts.
All processing happens inside your browser — your text is never uploaded, stored, or tracked.
How to use this case converter
- Type or paste your text into the input box on the left.
- Click any case card to apply that conversion.
- The converted result appears live in the right-hand box.
- Toggle options like Keep original punctuation or Trim whitespace as needed.
- Use Copy to copy the result, Download to save it, or Swap to send it back to the input.
Updated October 2026
Case formats explained
Each format has a specific purpose. Here is what every option does:
| Case | Example | Best for |
|---|---|---|
| Title Case | The Quick Brown Fox | Headings, titles, article names |
| Sentence case | The quick brown fox | Body text, descriptions |
| UPPERCASE | THE QUICK BROWN FOX | Emphasis, labels, codes |
| lowercase | the quick brown fox | Emails, social handles |
| Capitalize Each Word | The Quick Brown Fox | Names, proper titles |
| camelCase | theQuickBrownFox | JavaScript variables, JSON keys |
| PascalCase | TheQuickBrownFox | Class names, React components |
| snake_case | the_quick_brown_fox | Python variables, DB columns |
| kebab-case | the-quick-brown-fox | URLs, CSS classes, filenames |
| CONSTANT_CASE | THE_QUICK_BROWN_FOX | Constants, environment variables |
| Dot.case | the.quick.brown.fox | Config keys, namespaces |
| aLtErNaTiNg | tHe QuIcK bRoWn FoX | Stylised text, memes |
| InVeRsE | tHE qUICK bROWN fOX | Stylised text, emphasis |
camelCase, snake_case, and kebab-case
Programming cases are built by splitting your text into words and rejoining them with a separator. Whitespace, hyphens, underscores, and punctuation are used as word boundaries. This means "user profile", "user-profile", and "user_profile" all convert to the same camelCase result: userProfile.
Digits are preserved as part of the current word. For example, "version 2 update" becomes version2Update in camelCase.
If you need a specific separator, use the snake_case, kebab-case, CONSTANT_CASE, or Dot.case options directly.
Tips for consistent capitalisation
- Use Title Case for headings. Most style guides capitalise the first letter of each major word.
- Use Sentence case for body text. It is easier to read and matches how people naturally write.
- Use kebab-case for URLs. Hyphens are SEO-friendly and readable in search results.
- Use snake_case for databases. It is the default in SQL and most Python projects.
- Avoid alternating case for accessibility. It is decorative and hard for screen readers.
Frequently asked questions
Is this case converter free?
Yes. The tool is completely free, requires no account, and has no advertisements.
Is my text stored or uploaded?
No. All conversion and analysis happens locally in your browser using JavaScript. Nothing is sent to a server.
Does it work offline?
Yes. Once the page loads, every feature works without an internet connection.
Does it support non-English text?
Yes. Uppercase and lowercase conversions work with any script that has case distinctions, including accented Latin, Cyrillic, and Greek. Scripts without case, like Devanagari, are left unchanged.
What does "Keep original punctuation" do?
When enabled, punctuation is preserved as-is. When disabled, punctuation is treated as a word separator, which is useful for programming cases like camelCase and snake_case.
Can I convert to a case not listed here?
You can combine UPPERCASE or lowercase with the text tools to build custom formats. If there is a common format you would like added, let us know.
What does "Swap" do?
It copies the converted result back into the input box, so you can chain multiple conversions or apply other tools.