Piclizer

Protect PDF with Password

Add a strong password to a PDF before you share it. Encryption uses AES-256 and runs entirely on your device, so neither the document nor the password is ever transmitted.

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Drag & drop images here, or click to browse

Max 100 MB per fileAccepted: PDF
Your password never leaves this device — encryption runs entirely in your browser.

How to use

  1. 1

    Select the PDF you want to protect.

  2. 2

    Type a password and confirm it.

  3. 3

    Optionally set an owner password and choose which permissions to allow.

  4. 4

    Press Protect PDF and download the encrypted file.

Supported formats

Accepts

PDF

Produces

PDF

FAQ

AES-256, the strongest standard supported by modern PDF readers.

No, and neither can anyone else. The password is never stored or sent anywhere, so a lost password means a permanently locked file.

The user password is required to open the document. The owner password controls permissions such as printing and copying.

They instruct compliant readers to restrict those actions. They are a deterrent, not an absolute guarantee — only the open password truly protects content.

At least 8 characters mixing upper and lower case letters, numbers and symbols. The strength meter updates as you type.

About this tool: Protect PDF with Password

Add password protection to any PDF

The Protect tool wraps a PDF with standard encryption so it opens only with the password you set. Anyone who receives the file — by e-mail, cloud link or USB stick — must know the password to read a single page. Choose a strong password and your document is sealed.

Password protection is the minimum courtesy for sensitive documents: contracts, salary certificates, medical results, school reports. It is not a substitute for secure delivery, but it ensures that a misdirected attachment is a locked file rather than a leaked one.

Encryption is applied locally in your browser; your file and your password are never transmitted anywhere. Keep a note of the password — properly applied PDF encryption is not something anyone can simply click around, including us.

Like every Piclizer tool, this one runs entirely in your browser — your files stay on your device.

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