Convert tools

Uppercase / Lowercase Converter

Convert text to uppercase or lowercase and copy or download the result.

Convert in your browser · No sign-up

Unicode case conversion can change length, for example ß → SS. Languages without letter case remain unchanged.

Up to 100,000 UTF-16 units per input · 0 / 100,000

How to use

  1. Paste your text or load the example.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

Hello World → HELLO WORLD

Details and limitations

Convert text to uppercase or lowercase and copy or download the result.

Unicode case conversion can change length, for example ß → SS. Languages without letter case remain unchanged.

Text stays in your browser; it is not sent to a conversion server.

Format references

Tool page updated: