Uppercase Converter
Convert cased letters to uppercase while preserving whitespace, punctuation, numbers, and line structure.
Conversion runs only in this browser. Input and output are not uploaded.
Input size: 0 B.
How uppercase conversion works
Cased letters use the browser's Unicode case mapping. Line breaks, spacing, punctuation, digits, emoji, and uncased scripts retain their order.
Some Unicode case mappings can change the number of code points in the result. Processing remains browser-local.
Using this tool
Uppercase text
Convert cased letters to uppercase while retaining line structure, punctuation, and numbers.
Input and output
Example: `Hello, café!` becomes `HELLO, CAFÉ!`.
Important behaviour
The conversion works on Unicode cased letters, not just A–Z.
Keep in mind
Some scripts have locale-specific casing conventions that browser casing APIs cannot infer from context.
Conversion is performed in the browser. Copying or downloading happens only when you choose those actions.