Uppercase Text Converter
Convert text to uppercase using Unicode and the browser’s default locale.
Try a small example
Try a small example
Load the example into an empty form, then run the tool. Or paste your own text.
Example input
Hello, Ada!
Expected output
HELLO, ADA!
Converts letters to uppercase using the browser’s default locale. Unicode mappings can turn one character into several.
The example is unavailable until the tool is ready.
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Quick answer
Apply the browser’s locale-aware Unicode uppercase mapping to all letters; some characters expand, such as ß to SS.
The page and its assets load from the site; this operation uses your entered values only in this browser and does not send them to a calculation endpoint.
How to use it
Paste text and run the converter. Letters become uppercase while punctuation and spacing stay in place. Some characters can expand: for example, ß can become SS. Locale-specific letters such as Turkish i may also differ with the browser’s default locale.
Limits
A character may become more than one character, and locale-specific letters such as Turkish i can produce different results. This tool follows the browser’s default locale and has no locale selector.
Frequently asked questions
Can uppercase conversion change the character count?
Yes. Some lowercase characters expand into more than one uppercase character; for example, ß can become SS.
Why can the same letter look different on another device?
Some case mappings depend on locale. This tool uses the browser’s default locale and does not let you choose one.
Sources and references
These references document the cited standard or browser API; they do not validate the tool’s output.