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Swap Case

Swap upper and lower case for Unicode letters. Free swap case online, with no installation or account.

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Your files and input are processed in this browser. No uploads or accounts.

Tool capabilities

Input
TXT
Output
TXT · JSON

How to use Swap Case

Swap upper and lower case for Unicode letters. This swap case works directly in your browser and is free to use without an account.

  1. Paste or open your input in the editor.
  2. Run the tool and inspect the output. If the input is invalid, correct the reported error and run it again.
  3. Copy the result or download it to your device.

Swap Case · Example

Input

Hello world!
Local tools help you work.
Hello again.

Output

hELLO WORLD!
lOCAL TOOLS HELP YOU WORK.
hELLO AGAIN.

Swap upper and lower case for Unicode letters.

Usage notes

Inputs and results are processed on this device. Tool content is not sent to a processing server.

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Language

Code examples, format names and technical parser messages may use their original notation.