Secure your sensitive PDF files by adding a password instantly. Processing happens in your browser for 100% privacy.
Upload a PDF document and enter a password to securely encrypt it.
Unlike other PDF tools that upload your sensitive documents to their servers, our tool processes everything directly inside your browser using JavaScript.
Your documents are protected using robust AES encryption standards. Once locked, the file cannot be opened, copied, or printed without the correct password.
Secure as many PDF documents as you want without any restrictions, file size limits, or watermarks. Completely free and available 24/7.
We use modern browser architecture to encrypt files. This means zero data ever travels across the internet to our servers. Your documents remain entirely yours.
We do not ask for your email address to download your protected file. It is completely free, unlimited, and restriction-free.
Securing sensitive information is a critical requirement in both personal and professional environments. Whether you are dealing with financial statements, legal contracts, or confidential medical records, adding a password to your PDF document ensures that only authorized individuals can access its contents.
However, the hidden risk of using many free online PDF protectors is data privacy. Most services require you to upload your files to their cloud servers. This means they temporarily (and sometimes permanently) store your sensitive documents before processing them.
Our Free PDF Password Protector solves the privacy problem by utilizing client-side processing. Thanks to modern WebAssembly and advanced JavaScript libraries, your web browser is now powerful enough to encrypt PDF files directly on your computer's RAM.
No, your document never leaves your device. All encryption happens locally in your web browser using JavaScript for 100% privacy.
No. Because we never upload or store your file or password, it is impossible for us to recover your password once it is set. Please make sure to remember it or store it safely.
Modern PDF protection tools typically use AES-128 or AES-256 bit encryption to ensure high-grade security for your files, making them incredibly difficult to crack without the correct password.
There are no strict limits built-in to our tool. However, very large PDFs may take longer to process and depend entirely on the amount of RAM available on your local device.
Yes, as long as you know the password, you can open the PDF in standard software like Adobe Acrobat or Google Chrome and use the "Print to PDF" or "Save as" feature to save an unprotected copy.
