Skip to main content
FileWhirl
Sign up
PDF tools

Protect PDF. For free.

Lock a PDF with a password so only the right people can open it: secured with strong AES-256 encryption. No watermark, no signup, and we never store your password. iLovePDF can't say that.

Strong AES-256 encryptionPassword never storedNo signup or watermarkDeleted after 1 hour

AES-256

Bank-grade encryption

Private

Password never stored

Temporary

Deleted after 1 hour

How it works

  1. 01

    Add your PDF

    Drop in a PDF, or click to browse. It's uploaded privately over TLS.

  2. 02

    Choose a password

    Pick a strong password and confirm it. We use it once to encrypt. We never store it.

  3. 03

    Download the locked PDF

    We encrypt it with AES-256 and hand it back. Your upload and result are deleted after 1 hour.

More PDF tools: Merge · Split · Rotate · Compress · Page numbers · Watermark · Organize · Crop · Sign · Redact · Add text · N-up · Unlock · Repair · PDF/A · OCR · To images · Extract images.

Common questions

How strong is the encryption?+

We use AES-256, the same strong encryption standard banks and governments rely on. Anyone opening the PDF will need the password you set.

Do you keep my password?+

No. Your password is used once on our server to encrypt the file, then discarded. We never store it. Because of that, if you lose it the PDF can't be recovered, so keep it somewhere safe.

Is my file private?+

Yes. It's uploaded over an encrypted connection, protected on our own server with no third-party APIs, and the upload and result are deleted after 1 hour.

Will the PDF still open everywhere?+

Yes. It stays a standard PDF. Acrobat, Preview, Chrome, phones and every common reader will simply ask for the password before opening it.

Is there a limit?+

No watermark, no signup, and generous file sizes, free to use.