Add a password to a sensitive PDF, or remove one you already know. It uses strong 256-bit AES encryption and runs in your browser — your file is never uploaded.
Switch the action to “Remove a password”, enter the PDF's current password, and download an unlocked copy. This only works when you know the password.
This is deliberate. A tool that bypassed encryption would put everyone's protected documents at risk. meldpdf only helps you protect your own files, or unlock ones you already have the password for.
256-bit AES is only as strong as the password behind it. Use a long, unique passphrase, and share it with the recipient through a separate channel (not in the same email as the PDF).
No — encryption runs in your browser. The engine downloads once; your file never leaves your device. See our privacy policy.
No. That would be cracking encryption, which we don't do. You need the current password.
256-bit AES, the strongest standard PDF encryption.