Use the Find function to search text in any PDF

The fastest way to find text in a PDF is to use the Find function, which works the same way in almost every PDF reader. Press Ctrl+F on Windows or Command+F on Mac, type the word or phrase you are looking for, and the reader will highlight every match on the current page and jump to the first one. This takes seconds and works whether the PDF has 5 pages or 500.

The Find function only searches the text that is actually readable in the PDF. If the PDF is a scanned image of a document — like a photograph of a page — the search will not work because there is no text layer underneath. You can tell the difference by trying to select text with your cursor. If you can click and drag to highlight words, the PDF has searchable text. If the text does not select, it is an image and you will need to read through it manually or convert it first.

Key Takeaways

  • Press Ctrl+F (Windows) or Command+F (Mac) to open the Find box, then type the word you want to locate.
  • The search highlights all matches on the current page and shows you how many results exist in the entire document.
  • Use the arrow buttons or Enter key to move between results one at a time.
  • Scanned PDFs that are images will not search — you can only search PDFs with a text layer underneath.
  • Most PDF readers have a Find function built in, so you do not need special software or plugins.

Navigate between search results

After you type your search term, the PDF reader shows you how many matches it found in the whole document. Most readers display this as "1 of 47" or similar, meaning your search term appears 47 times. Use the down arrow button next to the search box to jump to the next match, or the up arrow to go back to the previous one. You can also press Enter to move forward or Shift+Enter to move backward.

If you want to see every page that contains your search term without jumping between them, some readers let you see a list of results. In Adobe Acrobat Reader, click the menu icon (three horizontal lines) next to the Find box to see options like "Find All" or "Highlight All". This shows you every instance at once, which is useful if you are trying to count how many times a word appears or want to see the context around each match.

Refine your search with options

Most PDF readers let you narrow your search to make it more precise. Look for a settings icon or arrow next to the Find box — it usually looks like three dots or a small gear. Common options include:

  • Match Case: Search only for the exact capitalization you typed. Turn this on if you want to find "Smith" but not "smith".
  • Whole Words Only: Find only complete words, not parts of words. Searching for "cat" will not match "catalog" or "scatter".
  • Search Bookmarks: Include the PDF's table of contents or bookmarks in your search.

If your first search returns too many results, using these options can help you narrow down to what you actually need. For example, if you search for "bank" and get 200 results, turning on "Whole Words Only" will exclude matches inside words like "bankrupt" or "banking" and show you only the standalone word "bank".

Search across multiple PDFs at once

If you need to find text in several PDF files in the same folder, you can search them all without opening each one individually. In Adobe Acrobat Reader, go to Edit menu and select Find, then look for an option to search in a folder. In Windows File Explorer, you can also right-click a folder and use the search box in the top right to look for text inside all PDFs in that location — though this works best if your PDFs have searchable text.

On Mac, open Finder, navigate to the folder with your PDFs, and use the search box in the top right. Type your search term and then click the "+" button to add a filter. Select "File Contents" to search inside the documents. This method is slower than searching one PDF at a time but saves you from opening dozens of files to find a single phrase.

Convert scanned PDFs so you can search them

If you have a scanned PDF — a photograph or photocopy turned into a PDF — the Find function will not work because there is no text layer. To make it searchable, you need to run it through optical character recognition (OCR), which is software that reads the image and creates a text layer underneath. Adobe Acrobat Reader (the paid version, not the free one) has OCR built in. Open the scanned PDF, go to Tools, select Recognize Text, and choose In This File. The software will process the document and add searchable text.

If you do not have Adobe Acrobat, free alternatives exist. Google Drive can convert scanned PDFs to searchable ones if you upload the file there. Right-click the PDF in Google Drive, select Open with, then Google Docs. Google Docs will run OCR automatically and create a text version you can search. You can then read it as a PDF. This process takes a few minutes depending on the file size, but it only needs to happen once.

Troubleshoot when Find is not working

If you press Ctrl+F or Command+F and nothing happens, your PDF reader may not support the Find function or the PDF itself may be locked. Try opening the PDF in a different reader — Adobe Acrobat Reader is free and works on Windows, Mac, and mobile devices. If Find still does not work, the PDF is likely a scanned image and needs OCR conversion before you can search it.

Some PDFs are intentionally locked to prevent copying or searching. If you own the PDF or have permission to modify it, you can try removing the lock in Adobe Acrobat (paid version only) by going to File, Properties, and checking the security settings. If the PDF belongs to someone else and is locked, you will need their permission to unlock it.

Use Find and Replace to edit text in PDFs

If you need to change a word throughout a PDF, most readers have a Find and Replace function. In Adobe Acrobat Reader (paid version), press Ctrl+H on Windows or Command+H on Mac. Type the word you want to find and the word you want to replace it with, then click Replace All to change every instance at once. This is much faster than finding and editing each occurrence manually.

The free version of Adobe Acrobat Reader does not have Find and Replace. If you need this feature and do not want to pay for the full version, you can convert the PDF to a Word document, make your changes there, and save it as a PDF again. Open the PDF in Adobe Acrobat Reader, go to Tools, select Export PDF, and choose Microsoft Word as the format.

Frequently Asked Questions

Why can't I search text in my PDF?

Your PDF is likely a scanned image rather than a document with a text layer. Try clicking on the text with your cursor — if it does not select, it is an image. You can convert it to a searchable PDF using OCR through Google Drive or Adobe Acrobat.

Can I search for a phrase instead of a single word?

Yes. Type the entire phrase in the Find box, including spaces and punctuation. The search will find that exact phrase. If you want to find the words in any order, you will need to search for them one at a time.

Does Find work on PDF pages that are images?

No. If the page is a photograph or scanned image, the Find function cannot read the text. You need to convert the PDF with OCR first to add a searchable text layer underneath the image.

How do I search a PDF on my phone or tablet?

Open the PDF in your phone's PDF reader app, then look for a magnifying glass icon or search option in the menu. The process is the same as on a computer — tap the search icon, type your word, and the app will highlight matches.

Can I search for special characters or numbers in a PDF?

Yes. Type the character or number in the Find box just as you would type a word. For example, searching for "$" will find all dollar signs, and searching for "2024" will find that year wherever it appears.