Protect PDF

Password protect PDF files online

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Lock a PDF with a password. Strong encryption applied in seconds — only people with the password can open the file.

or drag and drop PDF files here
    
  Drag & drop files to re-order
  You can apply different ranges to different files by selecting the file you want to split.
  Each page or range becomes its own PDF. You can apply different pages to different files by selecting the file you want.
  List the pages to remove — the rest of the document stays untouched. At least one page must remain.
  Anyone opening the file will need this password. Save it somewhere safe — a lost password cannot be recovered.
  Type the password the file currently opens with — the copy you download won't ask for it anymore.
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Private and Secure PDF Editing

Your files travel over an encrypted connection and are permanently deleted from our servers within a few hours.

Lock a PDF With a Password

Contracts, payslips, medical records — encrypt them in seconds, right in your browser, before they go anywhere.

Standard Encryption, Opens Everywhere

AES-256 — the protection every PDF reader understands. The file opens normally in any viewer once the password is entered.

Protect a PDF in Three Quick Steps

Upload your PDF, set a password, and download the locked copy — online, in seconds.

How to Password Protect a PDF Online

  1. Add your PDF files — drop them into the box above or pick them from your device.
  2. Type the password the file should require — and keep it somewhere safe.
  3. Click Protect and download — the copy asks for the password every time it opens.
A PDF document locked with a password

For the Files That Actually Matter

Email attachments get forwarded, shared drives get overshared, and a laptop bag sometimes stays on the train. A password on the document itself protects the file wherever it ends up — not just where you first sent it. One batch locks a whole folder with the same password.

Secure PDF processing with automatic file deletion

A Secure Online PDF Protector

Encrypt your files right in your browser — nothing to install. The password is used to encrypt your document and is not stored, your files travel over an encrypted connection, and uploads are permanently deleted from our servers within a few hours. Start right away and upgrade when you need higher limits.

A protected PDF requiring a password to open

Lock the Final Version

Protection works best as the last step: merge the pieces into one document, compress it so it emails cleanly, then lock it here. Changed your mind, or received a locked file yourself? Unlock PDF removes the password — as long as you know it.

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Converting PDF to Word, Excel, PPT, and JPG

Protect PDF — Frequently Asked Questions

How do I password protect a PDF online?

Add your PDF to the box above, type a password, and click Protect. The encrypted copy downloads in seconds and asks for that password every time it's opened.

How strong is the protection?

Files are encrypted with AES-256, the standard PDF viewers and readers support everywhere — the same protection Adobe Acrobat applies.

What happens if I forget the password?

The password cannot be recovered — not by us, not by anyone. That's the point of encryption. Keep it in a password manager, and keep an unprotected copy somewhere safe if you're unsure.

Can I protect several PDFs at once?

Yes — add a batch and every file in the run is locked with the same password. For different passwords, run the files one at a time.

The tool says my file is already protected — why?

A PDF can only carry one password at a time. Unlock it first with the Unlock PDF tool, then protect it with the new password.

Is it safe to send my file and password here?

Yes. Everything travels over an encrypted connection, the password is used only to encrypt your file and is not stored, and files are permanently deleted from our servers within a few hours.