Which modes are available?
Choose UPPERCASE, lowercase, Title Case, or Sentence case. Switching modes updates the output without changing your original input.
Case Converter
Switch text between four predictable letter-case modes while preserving its spacing and punctuation.
UPPERCASE output
Updates instantly when you type or choose another mode.
HELLO, WORLD! WELCOME TO TOOL TEAZE.
Your input is processed in your browser and is not stored.
What this tool does
This case converter provides uppercase, lowercase, Title Case, and Sentence case using simple, predictable browser-based rules.
How to use it
- Paste text into the input area.
- Choose one of the four conversion modes.
- Copy the updated output for your next step.
Example input and output
Input: hELLO, wORLD! welcome to tool teaze.
Output: Hello, World! Welcome To Tool Teaze.
Common use cases
- Standardizing headings
- Formatting data labels
- Cleaning up copied text from spreadsheets
FAQ
How do Title Case and Sentence case work?
Title Case lowercases the text, then capitalises each word start; hyphens begin a new word and apostrophes inside a word do not. Sentence case lowercases the text, then capitalises the first letter at the start, after sentence-ending punctuation, and on each new line. These are predictable formatting rules, not language-specific grammar.
Is my text private?
All processing happens in your browser, so your text is not sent to a paid API or stored by this app.
Can I use it on mobile?
Yes. The tool layout is responsive and works on phones, tablets, and desktop browsers.