What encryption is used?

Standard PDF security (128-bit RC4, compatibility level used by all major PDF readers including Acrobat, Preview, and Chrome).

Can I remove the password later?

Open the encrypted PDF in any reader with the password, print or re-save it, or use a decrypt tool. Keep your password safe - it cannot be recovered if lost.

Is my password sent to a server?

Never. The encryption key is derived inside your browser; only the encrypted result touches your disk.

Protect PDF with Password - Free 128-bit Encryption

Encrypt any PDF with a password. The encryption happens in your browser, so your password is never transmitted.

Drop your file here

or click to browse - processed locally, never uploaded

Password

Confirm password

Encrypt a PDF Without Sharing It

Password-protecting a PDF on most websites means uploading the unprotected document first - defeating the purpose. AiLoveKit performs the full PDF encryption in your browser: your file and your password are used locally to produce a standard encrypted PDF that opens in every major reader.

When to Password-Protect a PDF

Contracts and agreements shared by email.
Financial statements, invoices, and payslips.
Medical or legal records that must travel through untrusted channels.

Pair encryption with Remove Metadata to strip author and software fingerprints before sharing.

Protect PDF with Password - Free 128-bit Encryption

Drop your file here

Encrypt a PDF Without Sharing It

When to Password-Protect a PDF

Frequently Asked Questions