Text Case Converter – Convert Text to Any Case Online

Change the letter case of your text.

1 · Input

2 · Output

0Characters in
0Characters out
0Lines in

Sentence case capitalises every sentence, not only the first. Reversing letters works on whole characters, so emoji survive it.

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Best Text Case Converter

A2Z Tools brings you the very best online text tool where you can change to lower and upper case letters, where you can capitalize, convert to the alternate case, and remove an alternate word.

Explore the options below:

  • Sentence Case:The sentence case option allows a user to paste any text and it will transform it into a sentence.

    Note:This is an example of a sentence case.

  • Lower Case: To convert any word or sentence to lower case, just paste the text in the box and click on Lower Case. It will transform the entered details into lower.

    Note: this is an example of the lower case.

  • Upper Case:To convert any word or sentence to upper case, just paste the text in the box and click on Upper Case. It will transform the entered details into upper case.

    Note: THIS IS AN EXAMPLE OF UPPER CASE.

  • Capitalized Case: To convert any word or sentence to a capitalized case, just paste the text in the box and click on Capitalized Case. It will transform the entered details into capitalized cases.

    Note: This Is An Example Of Capitalized Case.

  • Alternating Case: The alternating case converter allows you to convert text into an alternating case. It will create a capital letter and then a lower case letter in the same word.

    Note: tHiS Is aN ExAmPlE Of aLtErNaTiNg cAsE.

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Quick answer

Paste your text, choose a case style — UPPERCASE, lowercase, Title Case or Sentence case — and copy the converted result instantly.

Key facts

  • Runs entirely in your browser via JavaScript
  • Supports common case conversions: UPPERCASE, lowercase, Title Case, Sentence case
  • No file upload or server round-trip involved
  • Free with no usage limit
  • Useful for formatting titles, headings, or fixing accidental caps-lock text

What is this tool?

The case converter rewrites your text in the capitalisation style you choose, saving you from retyping when a document, form or style guide demands different casing.

How to use it

Enter your text, select the case format you want, and the converted text appears instantly, ready to copy.
  1. Enter or paste your text into the input box.
  2. Choose the case conversion you want (uppercase, lowercase, title case, etc.).
  3. View and copy the converted text.

Example

Example: converting "hello world" to Title Case produces "Hello World", and to UPPERCASE produces "HELLO WORLD".

How it works

The page uses JavaScript's built-in string case-conversion methods, combined with word-boundary detection for Title Case and sentence-boundary detection for Sentence case, to transform your text instantly in the browser.

Common use cases

  • Fixing text accidentally typed with Caps Lock on
  • Preparing headlines in Title Case for articles
  • Normalising imported data to a consistent case

Benefits

Free, instant, and supports multiple common case formats in one tool.

Limitations

Title Case conversion typically follows simple capitalization rules and may not perfectly match style-guide-specific rules about capitalizing certain short words (like "a", "the", "of") differently depending on their position.

Privacy & your data

Conversion runs in your browser; your text is never sent to our servers.

Frequently asked questions

Does Title Case follow style-guide rules for short words?
This tool applies simple, consistent capitalization rules; it may not match every specific style guide's rules about capitalizing short words like "a" or "the" differently by position.
Can I convert text back to its original case?
If you keep your original text, you can always re-select a different case option; the tool doesn't destructively alter your original input unless you overwrite it.
Is my text sent to a server?
No. Case conversion happens entirely in your browser; your text is not sent to or stored on the A2Z Tools server.
Is this tool free to use?
Yes, it's free with no signup required.

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