Free Password Protect PDF
Secure confidential PDF documents with military-grade AES 256-bit encryption. Restrict unauthorized viewing and prevent copying directly in your browser.
Drag and drop PDF files
or browse to upload.
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Upload PDF Files
Drag and drop or select one or multiple PDF documents from your phone or computer.
Set AES Password
Enter your desired password, confirm it, and choose AES 256-bit military-grade encryption.
Download Protected PDFs
Download your encrypted PDF instantly or grab all protected files in an organized ZIP file.
Frequently asked questions
AES 256-bit encryption is the gold standard for cryptographic security adopted by governments, banks, and cybersecurity enterprises worldwide. Brute-forcing a 256-bit key is computationally infeasible with modern supercomputers.
No. Files Craft runs the encryption process entirely inside your web browser using modern Web Crypto and client-side JavaScript. Your confidential files never leave your device.
Yes. You can select and batch protect multiple PDF documents in one click with the same strong password, and download them all as a single organized ZIP archive.
Because AES 256-bit encryption does not possess any backdoor, there is no way to open or recover an encrypted PDF without the correct password. Be sure to record your password in a safe password manager.