Convert Case — Free Online Text Case Converter

Change text case online instantly. Convert to uppercase, lowercase, title case, and more. All 100% private and secure.

100% Private — No data ever leaves your browser.

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Built on Zero-Knowledge architecture. Your text is processed entirely on your device, never ours.

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Why Use Our Convert Case Tool?

In the digital age, text formatting is more important than ever. Whether you are a programmer naming variables, a student writing an essay, or a professional preparing a report, our Convert Case tool is designed to save you time and effort. Instead of manually retyping text, you can instantly transform it with a single click.

Our tool operates entirely in your browser, ensuring that your data stays private and secure. We don't send your text to any servers; all processing happens locally on your device.

Sentence Case

The sentence case converter will allow you to paste any text you’d like, and it will automatically transform it to a fully formed structured sentence. It works by capitalizing the very first letter in each sentence, and will then transform the rest of the text into lowercase as well as converting i’s into I’s. Every letter after a full stop will get converted into an upper case letter.

Lower Case

If you are wondering how to uncapitalize text, this is exactly what the lower case text converter will allow you to do - it transforms all the letters in your text into lowercase letters. Simply copy the text that you need generating into lower case and paste the text into the box above and select the ‘lower case’ tab.

Upper Case

The upper case transformer will take any text that you have and will generate all the letters into upper case ones. It will essentially make all lower case letters into CAPITALS (as well as keep upper case letters as upper case letters).

Capitalized Case

The capitalized case converter will automatically convert the starting letter of every word into an upper case and will leave the remaining letters as lower case ones.

Alternating Case

The alternating case converter will allow you to transform your text (no matter the current format) into text that alternates between lower case and upper case. It will generate a capital letter and then a lower case letter within the same word.

Title Case

The title case converter is perfect for those who are a bit unsure on how to title an upcoming essay. It essentially ensures the correct letters are capitalized within the context of a title. Words such as “an” will be left all in lower case and words that are important will be converted such as “Title”.

Inverse Case

The inverse case converter will allow you to inverse the case of your text. For example, if you have “Hello World”, it will convert it to “hELLO wORLD”.

Frequently Asked Questions

What is title case?

Title case capitalises the first letter of important words in a title, leaving minor words like "and", "or", "the" in lower case.

What is sentence case?

Sentence case capitalises only the first letter of the first word in each sentence, like normal prose.

Is this tool free to use?

Yes — Convert Case is completely free with no sign-up required.

Is my text sent to a server?

No. All conversions happen locally in your browser. Your text is never sent to any server.

How do I convert text to uppercase online?

Paste your text into the box above and click the "UPPER CASE" button. Your text is instantly converted.