What encryption is used?

Open-password protection with AES-256 applied on-device.

Will I need the password to open the file later?

Yes. Anyone opening the protected PDF — including you — needs the password you set. Store it safely.

Protect adds an open password. Unlock removes a password when you already know it.

No. Encryption is performed in the browser.

AES-256 open password on device

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100% on-device - this file is never uploaded.

What encryption is used?: Open-password protection with AES-256 applied on-device.
Will I need the password to open the file later?: Yes. Anyone opening the protected PDF — including you — needs the password you set. Store it safely.
Protect vs unlock — how do they relate?: Protect adds an open password. Unlock removes a password when you already know it.
Is my password sent to a server?: No. Encryption is performed in the browser.

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