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Case converter

Convert text to uppercase, lowercase, title case or sentence case. Copy the result or download a TXT file.

Your inputs stay herePUFFINMINT

Set your data

Set your data

Paste text and choose a style. Line breaks, punctuation and whitespace are retained; check the result before copying.

Result

The result updates as you type.

The values you enter stay on this page. Reloading or closing it clears them.

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How to use the tool

  1. Paste text and choose a style.
  2. Line breaks, punctuation and whitespace are retained; check the result before copying.
  3. Open Compare versions to see which characters change when you choose another mode.

Method and principles

Case conversion follows the page language.

Title case capitalizes every word; sentence case uses the browser’s sentence segmentation.

Practical example

HELLO WORLD becomes hello world in lowercase and Hello World in title case.

Input
  • Original text: Hello world
  • Text style: UPPERCASE
Result
HELLO WORLD

Options and limits

This does not correct grammar or preserve proper names and acronyms automatically. Some letters expand, such as ß becoming SS in uppercase.

Example details

Example details
ParameterValue
Characters including whitespace11

Limits and checks

Limits and checks
ParameterValue
Original text≤ 100000 characters

Frequently asked questions

Why does I behave differently in Turkish?

When converting to lowercase on the Turkish page, I becomes dotless ı and İ becomes dotted i. Case conversion follows the language of the page.

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