How to search multiple PDF files at once
Updated 20 October 2026
To search many PDFs at once, search the contents of a folder instead of opening files one by one. On Windows, open the top folder in File Explorer and type content:"your phrase" in the search box. On a Mac, search from a Finder window and add kind:pdf to keep the results to PDFs. Both only find PDFs that have a real text layer, and only in locations the system has indexed. A scanned PDF has no text layer, so neither built-in search can find words inside it.
Three things decide whether it works: the folder has to be indexed, the PDFs have to contain real text rather than pictures of text, and the words you type have to be the words in the file. The sections below show how to check each one, then what to do when the built-in search runs out.
1. Check that your PDFs contain text
Open one PDF and try to select a sentence with your mouse, as if you were going to copy it. If the text highlights normally, the file has a text layer and a search can read it. If nothing highlights, or you get a box over the whole page, the page is a picture of text. Anything that came out of a scanner, a phone scanning app or a “print to image” workflow is usually a picture.
This matters because a folder of PDFs is rarely uniform. A search that finds some files and silently skips others is almost always a mix of typed PDFs and scans. Scans have their own guide: how to search scanned PDFs and text in screenshots.
2. Windows: search every PDF in a folder with File Explorer
- Open File Explorer in the folder at the top of the tree you want to cover. Search covers that folder and everything below it.
- Click the search box at the top right and type
content:"termination notice". The content: operator asks for a match on what is inside the files rather than on their names. - To keep the results to PDFs, add an extension filter:
content:"termination notice" ext:.pdf. Windows readsext:.pdfas a match on the file extension. Microsoft’s documentation writes the exact form asSystem.FileExtension:=".pdf", which you can use instead. - Two words anywhere in the same file:
content:(contract AND deposit). AND, OR and NOT only work as operators when they are in capital letters; a lowercase “and” is searched as an ordinary word. - Leave something out:
content:"termination notice" NOT content:draft.
Two details save confusion. A single word matches words that start with it, so content:invoice also finds “invoices”. A phrase in quotes matches those words together, in that order. We checked how Windows reads each query above on Windows 11 Pro 25H2 (build 26200). The keywords are in your display language: Microsoft documents that Windows Search recognizes keywords in the current display language only, so on a PC set to another language use that language’s words.
If File Explorer finds nothing, check what is indexed
By default Windows indexes only your Documents, Pictures and Music folders and the desktop (Microsoft calls this Classic mode). A PDF on another drive or in a folder of your own is matched by file name only. Under Settings → Privacy & security → Searching Windows you can switch to Enhanced, which indexes the whole PC. Microsoft notes that it can use more system resources and that the first indexing run can take up to a couple of hours, so test a search only after it has finished.
There is one more switch that specifically affects PDFs. Open Indexing Options from the Start menu, then Advanced → File Types, select pdf and choose Index Properties and File Contents. With properties only, Windows sees the file name and nothing inside. Windows search not finding text inside PDFs covers the full checklist.
3. Mac: Finder, Spotlight and Preview
Spotlight (Command and Space) indexes the text inside many file types, including PDFs with a text layer, so a phrase from inside a document can surface it. Three ways to narrow it down:
- In a Finder window, type your words in the search field and add
kind:pdf. Apple listskind:pdfandkind:pdfsas the keywords for PDF, and givesNew York City kind:imagesas its example of the pattern. You can also click the Add button under the search field and choose Kind; an item has to match all your criteria to appear. - Save the search if you will repeat it. Click Save under the search field and it becomes a Smart Folder, which you can keep in the sidebar.
- In Terminal,
mdfind -onlyin ~/Documents "termination notice"searches one folder and everything under it, using the same index as Spotlight.
If a folder never shows up, check System Settings → Spotlight → Search Privacy: anything listed there is excluded from search. Preview is for the next step. Apple’s guide describes searching inside the PDF that is open: type a word or phrase in the toolbar search field, and a phrase is searched as an exact phrase. It does not find which of many PDFs contains a phrase.
4. Where built-in search stops
It matches the words you type, literally. Search for “salary” and a PDF that says “compensation” will not come up, on Windows or on a Mac. That is what keyword search is, not a fault in your setup.
It cannot read scans. A scanned page holds pixels, not characters. Windows’ indexer does not run OCR, and Spotlight is not reliable for scans either.
It searches one language at a time. A German contract does not match an English query. Searching files written in another language explains the workarounds.
5. When you need more: search every PDF by meaning
That is the gap BeaconFind was built for. It reads the text inside your PDFs and 70+ other file types, runs OCR over scanned PDFs as it indexes, and understands 50+ languages, so one search covers typed PDFs, scans and documents in other languages together. You press Ctrl+K on Windows, type what you remember, and the search matches by meaning, by keyword and by file name, so “rental contract” can find a PDF named scan0112.pdf whose text says “lease agreement” and never uses your exact words.
Each result shows the file, its folder and the passage that matched. Select one and the PDF renders beside the list with your match highlighted on the page it is actually on, so you can confirm it is the right file before you open it. Indexing runs quietly in the background and eases off when you use the computer.
Your files, their contents and your searches stay on your computer. The app does contact our server for two things, a licence check and an update check, and both can be blocked by a firewall without affecting search.
Search every PDF you own from one box. Free for 14 days, no card needed. Windows 10 and 11, and Macs with Apple Silicon.
Download BeaconFindWhich method should you use?
| Your situation | Use this |
|---|---|
| Typed PDFs in Documents, you know a phrase | File Explorer with content:, or Spotlight |
| PDFs on another drive or in your own folders | Switch Windows to Enhanced first, or use mdfind -onlyin on a Mac |
| Some PDFs are scans | OCR is needed, see scanned documents |
| You remember the topic, not the wording | Semantic search |
| You are hunting one invoice or contract | Find an invoice or contract by what it says |
Frequently asked questions
Can I search multiple PDFs at once without installing anything?
Yes, if the PDFs have a real text layer and sit in a location your system indexes. On Windows, open the folder in File Explorer and search content:"your phrase". On a Mac, search from a Finder window or Spotlight and add kind:pdf to keep the results to PDFs. Scanned PDFs are the exception, because their words are part of a picture.
Why does my search find some PDFs but not others?
Three usual reasons. The PDF is a scan, so there is no text for the index to read. The folder is not indexed, so only the file name is searched (on Windows, Classic mode indexes just Documents, Pictures, Music and the desktop). Or the words you typed are not the words in the file, because built-in search matches text literally.
How do I search PDFs for two words that are not next to each other?
On Windows, put AND between them in capital letters: content:(contract AND deposit). The file then has to contain both words anywhere. Putting the words in quotes instead means the two words together, in that order. Windows only treats AND, OR and NOT as operators when they are in capitals, so a lowercase "and" is searched as an ordinary word.
Does Preview on a Mac search several PDFs at once?
Apple's Preview guide describes searching the PDF that is open: you type a word or phrase in the toolbar search field and step through the matches. It is useful after you have found the file, not for finding which of many PDFs contains a phrase. For that, use Finder or Spotlight.
Can I search the contents of scanned PDFs across a whole folder?
Not with the built-in search on either system, because a scan holds pictures of words rather than text. You need OCR, which reads the letters out of the image. BeaconFind runs OCR over scanned PDFs while it indexes, so their contents become searchable alongside your typed PDFs.