How to Stop People Copying Text From a PDF (2026)
You spent hours on a report, a price list, a piece of writing, and now you have to send it out. The worry is familiar: the moment it lands, someone can drag their cursor across the page, copy every word, and paste your work somewhere else in seconds. You want people to read it, not lift it.
There is a practical way to stop that casual copying, and there is a lot of nonsense written about it. This guide is honest about what is actually possible, then shows you the one method that reliably works, for free, right in your browser.
- Open the free Lockdown tool and add your PDF.
- Pick Lockdown, which flattens every page to a high-resolution image.
- Download the result. The text is now part of the picture and cannot be selected, copied or searched.
- Add a password afterwards if you also want to control who can open it.
First, the honest part
You cannot make a document that a person can read but never reproduce. If their eyes can see it, a screen can be photographed and modern OCR can turn that photo back into text. Anyone selling you a magic button that makes a PDF truly uncopyable is selling you a feeling, not a fact.
What you can genuinely do is remove the effortless path. The difference between selecting all, copying, and pasting a whole document in two seconds, versus having to retype it or run it through OCR, is enormous in practice. It stops the accidental reuse, the lazy plagiarism and the quick keyword scrape, which is what most people actually mean when they say they want to lock a PDF.
Why permissions and passwords are not enough
PDFs support a "no copying" permission flag, and many people set it and feel safe. The problem is that it is only a request. It asks the reader's software to be polite and disable copying, and plenty of viewers simply ignore it. A free tool can strip that flag in seconds. It is a sign on the door, not a lock.
The reliable method does not rely on anyone's cooperation. Instead of asking software not to copy the text, you remove the text as text altogether.
The method that works: flatten the pages
A normal PDF keeps the text as a separate, invisible layer sitting exactly over the printed characters. That layer is what lets you select and copy. Flatten each page to an image and the layer disappears: the words become ordinary pixels in a picture. The page looks identical, but there is no longer any text to select, copy, search or extract. This is exactly what the Lockdown tool does.
Step 1. Add your PDF
Open the tool and drop your file in, or tap to browse. Nothing is uploaded. The file is opened in your browser's own memory and stays on your device the whole time.
Step 2. Choose Lockdown
Pick the Lockdown option. It re-renders every page at high resolution and rebuilds the document from those images, so the text layer is discarded entirely. Any hidden OCR text on a scanned file is dropped too.
Step 3. Download the locked copy
Save the result and open it. Try to select the text and you cannot: your cursor just drags a box across a picture. Your original file is untouched, so you always keep an editable copy for yourself.
What this stops, and what it does not
- Stops: selecting text, copy and paste, keyword search inside the file, and one-click extraction of your wording into another document.
- Does not stop: screenshots, photographing the screen, or someone running OCR to rebuild the text with effort. No file-level trick can.
- Best paired with: a password so only intended readers can open it, and a metadata scrub so the file carries no hidden author or history.
Lock it down properly in three passes
For a document you really want buttoned up, combine three quick steps. First flatten it so the text cannot be copied. Next, if any content is confidential, redact it before flattening so the removed words are gone for good. Finally, add a password so only the right people can open the file at all. Each step closes a gap the others leave open.
It all happens in your browser
The document you are trying to protect never leaves your device: the flattening runs on your own hardware, so there is no upload to trust and nothing stored on a server. If you want that same privacy across other document tasks, our guide to Browser mode explains how dozens of PDF tools can run fully offline on your device.
Frequently asked questions
Can you completely stop someone copying a PDF?
No, and any tool that promises otherwise is overselling. Anyone who can read a document can screenshot it, retype it, or run it through OCR. What you can do is stop casual copying: make the text impossible to select, copy, search or extract with a click, so the file cannot be lifted word for word in seconds. For most real situations, that is exactly the goal.
How do I make the text in a PDF non-selectable?
Flatten every page to an image. A normal PDF stores text as a separate, selectable layer sitting on top of the page. When you flatten the page to an image, that text layer is gone: the words are now just pixels in a picture, so there is nothing to select, copy or search. The document looks identical but behaves like a scan.
Does flattening reduce the quality?
Only slightly, and usually not noticeably. The pages are re-rendered at high resolution, so the result stays crisp on screen and in print. The file may get a little larger because images take more space than plain text, which is a fair trade for making the words uncopyable.
Is this the same as password protecting a PDF?
No, they solve different problems. A password controls who can open the file. Flattening controls what someone can do with the text once it is open. They stack well: flatten the pages so the text cannot be copied, then add a password so only the right people can open it in the first place.
Can people still screenshot or OCR the flattened PDF?
Yes, and that is worth being honest about. A determined person can photograph the screen or run OCR to rebuild the text. Flattening defeats casual copy-paste and keyword search, not a motivated adversary. If the content is truly sensitive, control who receives it rather than relying on the file alone.
Does it work on a scanned PDF?
A scanned PDF is already images, so its pages usually cannot be selected anyway, unless someone ran OCR on it. Flattening still helps by discarding any hidden OCR text layer, so even a searchable scan becomes a plain, non-selectable image.
Is it free, and are my files uploaded?
Yes it is free, with no signup and no watermark. The flattening runs entirely in your browser, so the document never leaves your device, and the flattened copy is saved straight to your downloads. Your original file is left untouched.