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Protect PDF

Password-Protect PDF Online

Add an open password and optional print or copy restrictions

Drop PDF here

or select a file from your device

Supported: .pdf

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Password strength will appear as you type
Passwords do not match.
Owner passwords do not match.
User password is required. We cannot recover a lost password after encryption. If owner password is blank, user password is reused for permissions.

Protection Applied

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Security Notes
Use strong passwords for sensitive documents.
Share passwords via a secure channel only.
Losing the password can make the file inaccessible.

Guide

Password-Protect PDF Online — Complete Guide

Protect PDF encrypts a PDF with an open password so it cannot be read without that password. You can add a separate owner password to control permissions; if you leave it blank, the open password is reused. Printing is disabled in the protected copy, and a lost password cannot be recovered.

A password on a PDF does one job: it stops someone opening the file without knowing the password. That is the difference between emailing a bank statement as an attachment and emailing it as a locked attachment. One is readable by anyone who finds it; the other asks for a password first.

Protect PDF takes one PDF, adds an open password, and returns an encrypted copy. An optional owner password controls the permission flags separately; when it is left blank, the open password is used for both. The protected copy also has printing disabled.

This protects the file, not the information once the file is open. Anyone who has the password can read, copy and keep the document. Treat the password as the real secret, send it through a different channel from the file, and keep an unprotected copy somewhere safe, because the tool cannot recover a password that is lost.

How It Works

Upload

Choose the PDF you want to lock. The file must open without a password already; unlock it first if it does not.

Set the open password

This is the password a reader needs before the document appears. Type it twice, and use the strength bar as a guide rather than a target.

Add an owner password

Optional. It controls permissions separately from opening the file; leave it blank and the open password is reused.

Protect and download

The encrypted copy downloads. Open it in a PDF reader and confirm it asks for the password before you delete anything.

Security & Privacy

Your PDF and both passwords are sent over HTTPS and used only to produce the encrypted copy you download. Passwords are not stored in an account, and the upload is deleted after processing.

Encryption stops a file being opened; it does not make an unsafe document safe. Send the password through a different channel, and check that the file contains nothing that should have been removed rather than locked. Our privacy policy explains retention and encryption.

Common Use Cases

  • Emailing statements or payslips: Lock a bank statement, invoice or salary slip before sending it as an attachment.
  • Cloud links and shared drives: Put a second lock on a file that will sit in a shared folder or behind a public link.
  • ID and KYC copies: Protect scans of a CNIC, passport or utility bill sent to an agent or portal.
  • Client deliverables: Send a draft report or design document that only the client can open.
  • HR and medical files: Keep offer letters, medical reports and appraisal notes out of the wrong inbox.
  • Archived records: Lock old contracts and statements that are stored but rarely opened.

Tips for Best Results

  • Send the password separately. A locked file and its password in the same email is one message away from being useless.
  • Use a passphrase, not a date of birth. Names, CNIC numbers and phone numbers are the first things anyone tries.
  • Keep an unprotected master copy. If the password is lost, the only copy you have is the one you cannot open.
  • Remember that printing is disabled. If the recipient has to print the document, decide that before you lock it.
  • Do not stack protection on a protected file. Unlock it first, then protect the new copy.
  • Test the download before sending it. Open it in a reader and confirm the password prompt appears.
  • Protection is not redaction. A password hides the whole file; it does not remove a paragraph that should not be in it.

Related guides

Browse all PDF & image guides

Frequently Asked Questions

An open password: the password a reader needs before the document is shown. It is required. An owner password is optional and controls permissions; if you leave it blank, the open password is used for permissions too.

Printing is disabled in the protected copy. If the recipient has to print the document, keep an unprotected version and share it through a channel you trust.

Not on this page. The tool sets the open password and disables printing, and there are no per-permission checkboxes for copying, editing or annotations. A desktop PDF editor is the tool for that level of control.

It cannot be recovered. The file is encrypted with the password you chose and PdfPeaks keeps no copy of it. Save the password in a password manager before you close the tab.

No. Unlock it first with the password you know, using the Unlock PDF tool, then protect the unlocked copy with the new password.

It stops opening without the password. Once the file is open, text can be selected and copied unless your PDF permissions block it, and this tool does not set copy restrictions.

Yes. It opens in standard readers such as Adobe Acrobat Reader, browsers and phone apps, and each one asks for the password first.

It is free and needs no account. The upload is deleted after processing and the encrypted download is temporary; passwords are not stored.

Yes. Protection does not care whether the pages hold text, a picture or a mix; the whole file is encrypted. If the scan is of an ID card or a signed page, check that it is the version you want to share before locking it.

The open password, called the user password in the form, is required to open the document. The owner password controls permissions. If both are the same, anyone who can open the file can also change permissions in an editor that honours them.

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