MostlyPDF

Protect PDF

Add a password so only people you share it with can open the PDF.

Open Protect PDF

How to use Protect PDF

  1. Upload your fileDrop your PDF onto the Protect PDF tool, or browse to select.
  2. Set your optionsChoose how you want Protect PDF to run — the options that matter, nothing more.
  3. DownloadRun the tool and download your finished file instantly.
Accepts
One PDF
Gives you
A password-protected, encrypted PDF
Price
Free — no sign-up, no watermark

Common questions

Is Protect PDF free?

Yes — Protect PDF is free with no sign-up, no watermark and no daily limit on this tool. Heavier operations (OCR, conversion) have a generous daily quota on the free plan and are unlimited on Pro.

How do I password protect pdf?

Open Protect PDF, drop your file, set the options, and download the result in a few seconds — processed securely, no queue and no ads.

Are my files safe?

Files are sent over an encrypted connection and deleted automatically after processing. No one else can access them and they are never used for anything but your task.

What happens if I forget the password?

Nobody can open the file — not even us. The password is not stored anywhere, which is what makes the protection real, so keep a copy of it somewhere safe before you share the PDF.

Is the file really encrypted, or just locked?

Really encrypted. The contents are unreadable without the password, rather than a flag asking a reader politely not to open it.

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