🛡️ Safe Web Utils

Password Protect PDF

Secure your PDF files with a password.

🛡️

Select PDF to Protect

Drag & drop or Click to Upload

Secure Your PDF Files with Free Online Encryption

Protect your sensitive documents with our Password Protect PDF tool. Whether you're sending financial statements, legal contracts, or personal records, adding a password ensures that only authorized people can view your files. Our tool uses standard PDF encryption techniques directly in your browser, guaranteeing 100% privacy and security.

How to Password Protect a PDF

  • 1
    Select File: Click "Select PDF to Protect" or drag and drop your file into the tool. We support large files.
  • 2
    Set Password: Type a strong password. We recommend mixing letters, numbers, and symbols for maximum security.
  • 3
    Verify Password: Double-check your password. Since we don't save your data, we cannot recover it if you forget it.
  • 4
    Encrypt: Click the "Protect PDF" button. Our client-side engine will encrypt the file instantly within your browser.
  • 5
    Download: Save the protected file. When anyone tries to open it, they will be prompted to enter the password you set.

Key Features

Unbreakable Privacy

We process your files 100% client-side. Your documents are never uploaded to our servers, so data leaks are impossible.

Instant Encryption

No waiting for uploads or downloads. The encryption happens instantly on your device using WebAssembly.

Standard Security

We use standard PDF encryption compatible with all PDF viewers (Adobe, Chrome, Edge, Preview).

Free Forever

Secure as many files as you want completely free of charge. No signup required.

Why Password Protect PDFs?

Email attachments and cloud storage aren't always secure. If your PDF contains sensitive information like bank account numbers, social security numbers, or confidential business strategies, leaving it unprotected is a risk.

Adding a password adds a strong layer of security, ensuring that even if the file is intercepted or shared accidentally, the contents remain locked and unreadable to anyone without the key.

Frequently Asked Questions

What if I forget my password?

IMPORTANT: Because we do not store your passwords or files, we cannot recover a lost password. Please make sure to save your password in a secure password manager.

Does this work on smartphones?

Yes, you can protect PDF files directly from your iPhone or Android device using this tool in your mobile browser.

Is the encryption strong?

Yes, we strictly follow PDF specifications for user password encryption, which prevents the file from being opened without the correct password.

Can I remove the password later?

Yes, if you know the password, you can use our Remove PDF Password tool to unlock the file and remove encryption.

Do you keep a copy of my file?

No. Your file is processed entirely in your web browser. Neither the file nor the password is ever sent to our servers. It is strictly private.

Is it really free?

Yes, this tool is 100% free to use. There are no hidden fees, subscriptions, or limits on the number of files you can protect.