Password Protect a PDF — Encrypted Locally

Choose a password, encrypt, download. Nobody else can read the file without it — including us, because we never see the file.

Quick answer: Add a password to any PDF free: encryption runs in your browser with pdf-lib, so the document and the password never touch a server. Download the protected file instantly.

PDF file

No file loaded yet.

Password

–pages

–protection

⚠️ There is no password recovery — we never see the file or the password.

How to use

Load the PDF.
Set a password.
Download the encrypted file.

About this tool

Sending a bank statement, a contract or a client report by email means the file sits in at least three mail servers unprotected. Adding a password costs nothing and takes ten seconds. Most online protectors upload your document to do it, which is the opposite of the point. This one encrypts locally: the password is applied to the copy in your browser's memory and the protected file is written straight to your device. Your file never leaves this page — pdf-lib runs in your browser, there is no upload endpoint on this site, and the document is dropped from memory when you close the tab.

FAQ

Is my PDF uploaded?

No. Your file never leaves this page — pdf-lib runs in your browser, there is no upload endpoint on this site, and the document is dropped from memory when you close the tab.

Do you store the password?

No. It is used in memory for the encryption and discarded when the tab closes.

What if I forget the password?

The file cannot be opened. There is no recovery, because we never had a copy.

How strong should the password be?

Twelve characters or more, mixed case with a number — the encryption is only as strong as the password.

Can the recipient still print it?

Yes, once they enter the password.

Does it work on phones?

Yes — the page is responsive and the encryption runs locally.

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Password Protect a PDF — Encrypted Locally

How to use

About this tool

FAQ

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