Protect PDF

A client-side tool that encrypts your PDF using a password. The file is encrypted in your browser with AES-GCM — no server involved. (Note: this is not standard PDF password protection but provides strong client-side encryption that can be decrypted with this tool.)

Choose File
Click or press Enter to choose a PDF. Original file input is hidden; custom UI shown here.
Enter a password used to encrypt the PDF (required to decrypt later).
Repeat the password to avoid typos.
Processing…
The encrypted file is stored locally in your browser as a downloadable file (extension .enc). To view it again, use this tool and the same password to decrypt and preview it.