Case Converter

Change text to UPPER or lower case

UPPER, lower, Title and Sentence case, plus camelCase and snake_case.

This all happens on your device. Nothing you type or add is sent anywhere. Check it yourself

Is my text sent anywhere?

No. It's converted in this tab, and the page's security policy blocks it from sending data anywhere.

Which words stay lower case in title case?

Short joining words such as a, an, and, of, the, to and in, unless they start the text.

What happens to numbers and emoji?

Numbers and emoji stay as they are in the plain cases, such as UPPER CASE and Title Case. The code styles, such as camelCase and snake_case, drop emoji and punctuation and keep the numbers.

About this tool

Runs	In your browser. Your files stay on your device.
Engine	Plain JavaScript
Title case	Keeps small words like of, the and and lower case
Works offline	Yes, once the page has loaded
Licence	AGPL-3.0
Added	27 September 2026
Built by	Sapience Design
Source	tools/text/case-converter

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Change text to UPPER or lower case

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