String to Uppercase Converter
Flip a whole string to UPPERCASE letters, however long the text is.
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How do you convert a string to uppercase?
Type “hello world” and you get “HELLO WORLD” back: every letter switches to its capital form while digits, spaces and punctuation pass through untouched. The conversion follows Unicode casing rules, so “café” comes out as “CAFÉ” and Greek or Cyrillic letters capitalise correctly too. Output updates on every keystroke, and the copy button grabs the result when you’re done.
How to use the String to Uppercase
- 1 Enter the string you want capitalised.
- 2 Watch every letter flip to its uppercase form as you type.
- 3 Check that digits and punctuation came through unchanged.
- 4 Hit copy to grab the ALL-CAPS output.
What you can use it for
- Making headings or titles stand out in ALL CAPS.
- Normalising codes or reference numbers to uppercase.
- Shouting a short message for emphasis.
- Preparing constants before snake_case conversion.
Frequently asked questions
What happens to digits and punctuation?
Nothing. Uppercase only applies to letters, so “order #42!” becomes “ORDER #42!” with the number, hash and exclamation mark exactly where they were.
Can it capitalise accented or non-Latin letters?
Yes. Casing follows the Unicode standard, so “café” maps to “CAFÉ” and Cyrillic “привет” to “ПРИВЕТ”. Scripts without capital forms, like Chinese, pass through as-is.
I capitalised something by mistake. Can I get lowercase back?
The original mixed casing is gone once converted, but pasting the result into the String to Lowercase tool gives you an all-small-letters version in one step.
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