One tool, every case. Paste your text and switch between UPPERCASE, lowercase, Title Case, Sentence case, alternating and inverse case instantly.
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg and more in a single tool. Free and instant.
All-in-One Text Case Converter examples
Input
Output
the quick brown fox
THE QUICK BROWN FOX (uppercase)
THE QUICK BROWN FOX
the quick brown fox (lowercase)
the quick brown fox jumps over the lazy dog
The Quick Brown Fox Jumps over the Lazy Dog (title case)
the quick brown fox. it ran fast.
The quick brown fox. It ran fast. (sentence case)
hello world
hElLo wOrLd (alternating case)
How the all-in-one text case converter works
Paste or type your text into the input box — there is no length limit.
Pick a target case: UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg or iNVERSE.
The result updates instantly as you type; copy it with one click.
Rules and edge cases
Switching case never changes the words, spacing or line breaks — only letter casing is rewritten, so paragraph structure survives.
Title Case keeps short function words lowercase in the middle of a line; Sentence case only capitalises after . ! and ?.
aLtErNaTiNg and iNVERSE case walk the text by grapheme, so an emoji or an accented letter never splits in half.
Use this tool when you want to compare several cases side by side; the single-purpose pages (uppercase, lowercase, title case) skip straight to one result.
Frequently asked questions
Does converting case break my line breaks or indentation?
No. Only letters are remapped. Tabs, multiple spaces, empty lines and the order of paragraphs come out exactly as you pasted them.
What is iNVERSE case used for?
It flips each letter's existing case, which is mainly used to repair text typed with Caps Lock stuck on — THIS becomes this and tHIS becomes This.