How To Search a PDF for Words or Phrases

Whether you’re skimming a short contract or digging through a long report, finding the right word quickly matters. PDFs usually make this easy, but things can break when the file is scanned, locked, or missing searchable text.

Below, we’ll show you how to search words in PDFs on Mac, Windows, and mobile, plus what to do when text won’t highlight and OCR (Optical Character Recognition) is required to make the file searchable.

Quick Steps to Search Words in a PDF

If you only need the fastest answer, do this:

• Open the PDF in your browser or PDF reader.
• Press “Ctrl + F” (Windows) or “Cmd + F” (Mac).
• Type your word or phrase, then use the arrows to jump through matches.
• If nothing highlights or search finds nothing, the PDF is likely scanned. Run Smallpdf PDF OCR to make it searchable.

How To Search Words in PDF Files (Quick Start)

This method works in most browsers and PDF readers.

• Open your PDF.
• Press “Ctrl + F” (Windows) or “Cmd + F” (Mac).
• Type your search term.
• Use “Enter” (or the arrow buttons) to move to the next result.
• Use “Shift + Enter” to move to the previous result in many viewers.

A Simple Check: Is Your PDF Searchable?

Before you assume search is broken, try this:

• Click and drag across a sentence.
• If text highlights normally, your PDF is searchable.
• If you can’t highlight text, it’s likely an image-based scan. You’ll need OCR.

How To Search a PDF on Mac

Most Mac users open PDFs in Preview.

• Open the PDF in Preview.
• Press “Cmd + F” to open the Find bar.
• Type your word or phrase.
• Press “Enter” to jump through results.

Tip: If Preview finds nothing, your PDF may be scanned. Jump to the OCR section below.

How To Search a PDF on Windows

If your PDF opens in a browser or a built-in viewer, the shortcut still works.

• Open the PDF.
• Press “Ctrl + F.”
• Type your search term.
• Use the arrows to move between results.

If the search works sometimes but not for certain PDFs, that usually points to scan-based pages or font encoding issues.

How To Search a PDF on iPhone or Android

Mobile PDF apps vary, but the pattern stays the same.

• Open the PDF in your PDF app or browser.
• Tap the search icon (usually a magnifying glass).
• Type your term, then tap Next to move through matches.

If you don’t see a search icon, open the PDF in a different viewer or upload it to Smallpdf PDF Reader in your mobile browser, then use search there.

How To Search Multiple PDF Files at Once

If you’re trying to find one clause across many PDFs, you have three practical options.

Option 1: Use Advanced Search in a Desktop PDF Reader

Some desktop readers let you search a whole folder. Look for “Advanced Search” or “Search in folder,” then point it to the folder that holds your PDFs.

This is great for legal packs, audit folders, or research libraries.

Option 2: Merge PDFs First, Then Search Once

If you don’t have multi-file search, combine your PDFs into one file.

• Open Smallpdf Merge PDF.
• Upload your PDFs.
• Arrange them in order.
• Merge, then search the combined file with “Ctrl + F” or “Cmd + F.”

This works best when you want one searchable master file.

Option 3: If They’re Scanned, OCR Them First

Searching multiple PDFs won’t help if none of them contain real text. In that case:

• Run Smallpdf PDF OCR on the scanned files first.
• Then search inside each file, or merge them after OCR.

Small reminder: OCR quality depends heavily on scan clarity.

Advanced PDF Search Tips That Save Time

Basic search is enough most days. When it isn’t, use these tactics.

1. Search an Exact Phrase

Try the full phrase as you see it in the document. If phrase search fails, try:

• Removing punctuation.
• Searching for a shorter chunk of the phrase.
• Searching for a unique word inside the phrase.

2. Handle Line Breaks and Hyphenation

PDFs often split words at the end of a line, like:

• “informa-” on one line
• “tion” on the next

If your search misses the word, try searching the first half, or search a nearby word that won’t split.

3. Use Case Matching When It Matters

If you’re searching IDs, codes, or acronyms, case can matter in some readers. If you keep missing matches, look for a “Case sensitive” option in your search settings.

If You Can’t Search the PDF, Make It Searchable With OCR

If the text won’t highlight, the PDF is usually a scanned image. Search can’t see words inside images until OCR creates a text layer.

Smallpdf can do this quickly, and then you can search normally.

Make a Scanned PDF Searchable With Smallpdf PDF OCR

• Open PDF OCR.
• Upload your scanned PDF.
• Let OCR process the file.
• Download the new searchable PDF.
• Open it and search using “Ctrl + F” or “Cmd + F.”

Security note: Files you upload are protected with advanced TLS encryption, and files are automatically deleted after one hour on many Smallpdf workflows.

Why PDF Search Isn’t Working (And How to Fix It)

If search feels broken, it’s usually one of these.

1. The PDF Is Scanned

Signs you’re dealing with a scan:

• Text won’t highlight.
• Copy and paste doesn’t work.
• Search finds nothing.

Fix: run Smallpdf PDF OCR, then try searching again.

2. The PDF Is Password-Protected or Restricted

Some PDFs block searching, copying, or selecting text.

Fix options:

• Enter the password if you have it.
• If you have permission to remove restrictions, use Smallpdf Unlock PDF, then search again.

Only remove protection on files you own or have explicit permission to modify.

3. The Text Is Embedded in a Weird Way

Sometimes a PDF looks normal, but the text layer has encoding issues. You’ll notice this when:

• Copy and paste produces random symbols.
• Search only works for some words, not others.

Fix options:

• Try searching a shorter part of the word.
• OCR the file to rebuild a cleaner text layer.
• Convert to Word using Smallpdf PDF to Word, then search in Word.

Find Text, Then Highlight It for Review

Once you find the right section, saving it is the next win.

With Smallpdf PDF Annotator, you can:

• Highlight the sentence you searched for.
• Add a note next to it.
• Draw an arrow to call it out.
• Export the updated PDF for sharing.

This is especially useful for approvals, feedback cycles, and study notes.

Search PDFs Faster With Smallpdf

If your PDF search works, great. If it doesn’t, Smallpdf helps you fix the root issue fast.

• Use PDF Reader to open and search PDFs in your browser.
• Use PDF OCR to make scanned PDFs searchable.
• Use PDF Annotator to mark what you found and share it cleanly.

Start your free trial to access all Smallpdf tools and streamline your PDF workflow.

Frequently Asked Questions

How do I search words in PDF files?

Open the PDF and press “Ctrl + F” (Windows) or “Cmd + F” (Mac). Type your word or phrase, then move through results with the arrows.

Why can’t I search a scanned PDF?

A scanned PDF is usually an image. Search can’t detect words inside images until OCR creates a searchable text layer. Run Smallpdf PDF OCR, then search again.

How do I search a PDF on my phone?

Open the PDF in a mobile PDF viewer and tap the magnifying glass icon. If your viewer doesn’t support search, open the file in your browser and use a PDF reader that includes search.

How do I search multiple PDFs at once?

Use a desktop reader with folder search, or merge the PDFs into one file with Smallpdf Merge PDF, then search the combined document.

Why doesn’t Ctrl + F work in my PDF?

The PDF may be scanned, restricted, or have a broken text layer. First, try highlighting text. If you can’t select it, use OCR. If it’s restricted, unlock it only if you have permission.

Can I search a password-protected PDF?

Yes, if you can open it and it allows searching. Some PDFs restrict search and copying until you enter the owner password. If you have permission, Smallpdf Unlock PDF can remove restrictions.

How do I search for an exact phrase in a PDF?

Type the full phrase into the Find bar. If it fails, remove punctuation, search a shorter segment, or search a unique word within the phrase. Some viewers also struggle with line breaks and hyphenation.

Can I find and replace text in a PDF?

Most basic PDF viewers don’t allow you to quickly “replace” text like some word processing software. A reliable workaround is converting the PDF to Word using Smallpdf PDF to Word, editing the text in Word, then exporting back to PDF.