How to search for a word inside a PDF

To search a PDF, open it in a reader or PDF tool, tap the search or find option, type a word or phrase and step through the matches one by one. Each match is highlighted and the view jumps to its page. If a search finds nothing even though you can see the word, the file is almost certainly a scanned image with no text layer.

How to search a PDF, step by step

1. Open the PDF in an app that has a search or find feature. It is usually a magnifying glass icon or sits inside a menu.
2. Type the word or phrase you are looking for.
3. Look at the match count, if your app shows one. It tells you straight away whether the word appears once or fifty times.
4. Use the next and previous arrows to move between matches. The page scrolls to each one and highlights it.
5. To start again with a different term, clear the search box and type a new word.

Why does PDF search find nothing?

This is the most common question about PDF search, and the answer is nearly always the same: the PDF has no text to search.

There are two kinds of PDF pages:

• Digital pages were created from a document, a web page or an app. The words are stored as text, so you can search, select and copy them.
• Scanned pages are photographs of paper. To a computer they are just pixels, even though you can read the words.

A quick test: try to select a word with your finger. If the whole page highlights as one block, or nothing selects, it is a scan.

The fix is OCR. OCR (optical character recognition) is software that reads the letters in an image and adds a hidden text layer behind the picture. After that, search works normally. Our guide on how to make a scanned PDF searchable with OCR walks through it.

Other reasons a search misses a word

Even on digital PDFs, search can miss things. Common causes:

• Hyphenated line breaks. A word split as "docu-" and "ment" across two lines may not match "document".
• Ligatures and special characters. Some fonts store "fi" or "fl" as a single character, which can confuse simple search.
• Words in images. Logos, charts and screenshots inside a digital PDF are pictures, not text.
• Different spellings. "Organise" and "organize", or "e-mail" and "email". Try both.
• Text in another script. If you search in one alphabet and the document uses another, there is nothing to match.

Tips for searching long PDFs faster

• Search for an unusual word. "Termination" finds the right clause faster than "the contract".
• Use part of a word. "Deposit" also finds "deposits" and "deposited" in most search tools.
• Search numbers. Invoice numbers, dates and amounts are often the quickest way to find a specific line.
• Use bookmarks for big jumps. Search is great for a word, but to get to "Chapter 6" quickly, the sidebar outline is faster. See how to add bookmarks and a table of contents to a PDF.

Searching across many PDFs at once

Searching one file is easy. Finding which of your two hundred PDFs mentions a policy number is harder. Some file managers and PDF apps can search across all your documents at once, using the text inside them. Scanned files still need OCR for this to work.

An AI assistant can help when you are not sure of the exact wording. Instead of guessing the word, you ask a question in plain language. Our guide on how to summarize a PDF and ask it questions explains how that differs from keyword search.

Copying what you found

Once search lands on the right line, you can usually long-press to select and copy the text. If you need the whole document as text, for example to paste into an email, an extraction tool is quicker than copying page by page. See how to extract all the text from a PDF.

Searching PDFs with PDF Burrow

PDF Burrow has a Search in PDF tool that finds any word or phrase across the document and jumps to it. For scans, the Make Searchable (OCR) tool adds a text layer on the device first. The Ask AI tool can also search across all your files, and it works on the phone too.

Frequently asked questions

Is PDF search case-sensitive?

Usually not. Most readers find "Invoice", "invoice" and "INVOICE" with the same search, unless you turn on a match-case option.

Can I search a password-protected PDF?

Yes, once you have opened it with the password. If the file also blocks copying, search may still work even though selecting text does not.

Why does search find a word but highlight the wrong spot?

On OCR'd scans, the hidden text layer can be slightly misaligned with the picture. The match is real, but the highlight may sit a little off.

Can I search for a phrase, not just one word?

Yes. Type the full phrase. If it is not found, try a shorter part of it, as line breaks and hyphens can split phrases inside the file.