Use Find & Replace to change every occurrence at once

Open the Find & Replace dialog by pressing Ctrl+H on Windows or Command+Option+F on Mac. Type the word you want to find in the "Find what" field and the replacement word in the "Replace with" field. Click Replace All to change every instance throughout the entire document in one action.

This method works across your whole document, including headers, footers, and text boxes. If you want to replace only some instances instead of all of them, use Replace (the button next to Replace All) to go through each one and decide whether to change it.

Key Takeaways

  • Press Ctrl+H (Windows) or Command+Option+F (Mac) to open Find & Replace without navigating through menus.
  • Type the word to find and the replacement word, then click Replace All to change every instance at once.
  • Use the Replace button instead of Replace All if you want to review each instance before changing it.
  • Match case and whole words only options let you avoid replacing parts of other words or changing capitalization unintentionally.
  • Replace All works across headers, footers, text boxes, and the main document body in a single action.

How to access Find & Replace from the menu

If you prefer using the menu instead of the keyboard shortcut, click the Home tab on the ribbon. In the Editing group on the right side, click the dropdown arrow next to Find and select Replace. This opens the same Find & Replace dialog.

On Mac, go to the Edit menu at the top and select Find, then Replace. Both routes open the identical dialog where you enter your search and replacement terms.

Protect against accidental replacements with matching options

Before you click Replace All, check the options at the bottom of the Find & Replace dialog. Click More Options (or Options on Mac) to see additional settings that prevent mistakes.

Check Match case if you want to replace only words with the exact same capitalization — for example, replacing "John" but not "john". Check Whole words only if you want to replace the complete word and not parts of longer words — for example, replacing "cat" but not the "cat" inside "catalog". These two options together catch most common replacement errors.

Review replacements before committing to them

If you are uncertain about replacing every instance, use the Replace button instead of Replace All. This opens each occurrence one at a time so you can decide whether to change it. Click Replace to change that instance and move to the next, or click Find Next to skip it without replacing.

This approach takes longer but gives you control over which instances change. It is useful when the word you are searching for has multiple meanings in your document, or when you want to change only certain sections.

Replace across multiple documents at once

Word does not have a built-in feature to replace across multiple documents in a single action. Instead, open each document separately and run Find & Replace on it individually. If you have many documents to update, this is the only method available within Word itself.

Some users copy all the text from multiple documents into a single temporary document, run Replace All once, then copy the corrected text back to the original files. This works but requires extra steps and carries a small risk of formatting loss.

Undo a Replace All if you made a mistake

If Replace All changed something you did not intend, press Ctrl+Z (Windows) or Command+Z (Mac) when ready to undo. Word reverses the entire Replace All action in one step, restoring the document to its state before the replacement.

Undo works only if you have not closed the document since the replacement. If you closed and reopened the file, the changes are permanent and cannot be undone. For this reason, saving a copy of your document before running Replace All on a large or important file is a safe habit.

Frequently Asked Questions

Can I replace a word only in a specific section of my document?

Word does not allow you to limit Find & Replace to a single section. Select the text you want to search before opening Find & Replace, and Word will search only within that selection. After you close Find & Replace, the selection remains, so you can repeat the process for other sections if needed.

What happens if I use Replace All and it changes something I did not expect?

Press Ctrl+Z (or Command+Z on Mac) when ready to undo the entire Replace All action. Word reverses all changes at once. If you have already closed the document, the changes cannot be undone, so saving a backup before large replacements is wise.

Does Replace All work in headers and footers?

Yes. Replace All searches the entire document, including headers, footers, text boxes, and comments. If you want to search only the main body text and skip headers and footers, you must manually edit those sections or select only the body text before opening Find & Replace.

How do I replace a word but keep the original capitalization?

Word does not have an automatic option to preserve capitalization patterns. If you need "John" to become "Jane" and "JOHN" to become "JANE", you must run Replace All twice — once with Match case checked for "John" → "Jane", and again for "JOHN" → "JANE".