The fastest way to change text case in Word

Open the document in Microsoft Word, select the text you want to change, then go to the Home tab and click the Change Case button (it looks like "Aa" with a dropdown arrow). Choose lowercase from the menu. Word will convert all selected text to lowercase letters when ready.

If you cannot find the Change Case button, your version of Word may have it in a different location. In older versions or on some devices, it lives under Format > Text > Change Case. The result is the same either way.

This method works for any amount of text — a single word, a paragraph, or an entire document. You can undo the change by pressing Ctrl+Z (or Command+Z on Mac) if you change your mind.

Key Takeaways

  • Select the text you want to change, then use Home > Change Case > lowercase to convert it all at once.
  • Word offers five case options: lowercase, UPPERCASE, Capitalize Each Word, tOGGLE cASE, and Sentence case.
  • The Change Case button location varies by Word version — check the Home tab first, then Format if you cannot find it there.
  • You can change case for a single character, a word, multiple paragraphs, or an entire document without retyping anything.

Where to find the Change Case button in different Word versions

Microsoft Word has moved the Change Case button around over the years, so the exact path depends on which version you use. In Word 2016 and newer (including Microsoft 365), it is always on the Home tab in the ribbon at the top. Look for the button labeled "Aa" with a small arrow next to it, usually near the font color and highlighting tools.

In Word 2010 and 2013, the button is in the same place. In Word 2007, you may need to look under Format > Text > Change Case instead. On Mac versions of Word, the Home tab location is the same, but if you cannot find it there, try Format > Text > Change Case.

If you use Word Online (the free version in your web browser), the Change Case button is also on the Home tab, but it may be labeled differently or grouped with other text formatting options. Click around the font formatting area if the "Aa" button is not when ready visible.

The five case options Word offers

When you click the Change Case dropdown, you see five choices. Sentence case capitalizes only the first letter of the sentence and proper nouns — useful if you have text that is all caps and you want it to read normally. lowercase converts everything to small letters. UPPERCASE converts everything to capital letters. Capitalize Each Word puts a capital letter at the start of every word, which is useful for titles. tOGGLE cASE flips whatever case each letter already has — capitals become lowercase and lowercase become capitals.

Most of the time you will use lowercase, UPPERCASE, or Sentence case. The other two are less common but helpful in specific situations. For example, if you accidentally typed a heading in all caps and want to fix it to title case, Capitalize Each Word does that in one click.

Changing case for part of a document instead of all of it

You do not have to change the case of your entire document. Select only the text you want to change — you can click at the start of a word and drag to the end, double-click a single word, or triple-click to select an entire paragraph. Once the text is highlighted in blue, the Change Case button will affect only that selection.

This is useful when you have a document with mixed formatting and only certain sections need to be changed. For example, you might have a title in all caps that needs to be lowercase, but the rest of the document is already correct. Select just the title, explore the change, and leave everything else untouched.

What to do if changing case does not work as expected

Sometimes text that looks like it should be lowercase is actually formatted with a special style that forces it to display in capitals. This is called small caps formatting. If you change the case but the text still appears in capitals, the case change worked — the display just has not updated. Try clicking elsewhere in the document and then back to see the change, or close and reopen the file.

If the Change Case button is grayed out and you cannot click it, you probably have not selected any text. Click in your document and select the text you want to change, then try again. If the button is still unavailable, your version of Word may not have this feature — very old versions sometimes lack it, though this is rare.

If you change case and then realize you made a mistake, press Ctrl+Z when ready to undo. You can undo multiple times to go back several steps if needed.

Using Find and Replace for case changes across a large document

If you need to change case in many places throughout a long document, Find and Replace can be faster than selecting each section individually. Open Find and Replace by pressing Ctrl+H (or Command+H on Mac). Type the text you want to find in the "Find what" field.

In the "Replace with" field, type the same text but in the case you want. Then click Replace All to change every instance at once. This works best when you are looking for a specific word or phrase that appears multiple times — for example, replacing "JOHN" with "john" throughout a document. For more complex changes, the direct Change Case method is usually simpler.

Frequently Asked Questions

Can I change case in Word on my phone or tablet?

Word for mobile devices (iPhone, iPad, Android) does not have a dedicated Change Case button. On mobile, you will need to select the text and retype it in the case you want, or use the desktop version of Word if you have access to a computer. The mobile app is designed for viewing and light editing rather than complex formatting.

Does changing case affect the actual content of my document, or just how it looks?

Changing case actually changes the letters themselves in your document. If you change "HELLO" to "hello", the document now contains "hello" — it is not just a display effect. If you save and close the document, the change stays. This is why you can undo it if you change your mind.

What if I want to change only the first letter of a word to lowercase?

The Change Case button works on entire selections, so it cannot change just one letter. To change a single letter, click right before it and select only that letter, then use Change Case. Or straightforward delete it and type the lowercase version. For a single letter, typing is usually faster.

Can I create a keyboard shortcut for the Change Case function?

Word does not assign a default keyboard shortcut to Change Case, but you can create one yourself in Word's settings. This is more advanced and varies by version, so check Microsoft's support site for your specific version if you use this feature constantly. For most people, clicking the button is fast enough.