Protect PDF

Add password protection to your PDF

Drag & drop your file here

Browse Files

Accepted formats: .pdf · Max 50 MB per file

Secure your sensitive documents from unauthorized access. Our free online PDF protection tool uses strong encryption to add a password to your PDF files. Keep your financial records, personal information, and confidential business documents completely safe.

✦Why Use Our Protect PDF Tool?

🔐
Strong Encryption
We use industry-standard AES encryption to ensure your files cannot be opened by anyone without the correct password.
💻
100% Local Processing
Your files never leave your browser. They are encrypted securely on your own device, guaranteeing total privacy.
📄
No Quality Loss
The encryption process does not alter the contents or layout of your PDF document in any way.
🚀
Free & Unlimited
Protect as many files as you want without any hidden charges or registration requirements.

✦How It Works

1
Upload your Document
Drag and drop the PDF you want to protect into the upload area.
2
Set a Password
Enter a strong, memorable password that will be required to open the document.
3
Encrypt & Download
Click 'Protect', and your newly encrypted file will be ready to download in seconds.

Who Can Benefit from Protect PDF Tool?

→Securing financial statements before emailing them

→Protecting personal medical records

→Restricting access to confidential business proposals

→Safeguarding legal contracts and agreements

Frequently Asked Questions

Upload your PDF to PDFCraftor's Protect PDF tool, enter your desired password, and click "Protect". A new password-protected version of your PDF will be created for download. Anyone opening the file will need the password.

PDFCraftor uses strong AES encryption to protect your PDF files. This is the same standard used by banks and government agencies to secure sensitive documents.

Our tool lets you set a password that is required to open the PDF. This prevents anyone without the password from viewing or editing the document contents.

No. Adding password protection only encrypts the file — all text, images, formatting and layout remain exactly the same. The only difference is that a password is now required to open it.

Yes. PDFCraftor processes everything in your browser. Your PDF and password are never uploaded to any server, ensuring complete privacy and security.

Because we use strong encryption and do not store your passwords, there is no way for us to recover it if lost. Please make sure to keep your password in a safe place.

Absolutely. All processing occurs locally on your machine. We never transfer or store your original or encrypted PDF files on our servers.

Yes, our tool handles large documents with ease, encrypting them in seconds right inside your browser without any restrictive file size limits.

Yes! Protecting your PDFs with passwords is 100% free. There are no daily limits, hidden fees, or accounts required.

Yes, our PDF protection tool is fully optimized for mobile browsers, allowing you to secure files directly from your phone or tablet.