Protect a PDF with real encryption
AES-256 encryption, an opening password, and fine-grained permissions for printing, copying, editing and form filling. Applied locally, the password never travels.
Drop your PDF here to start
to use Protect PDF (free, no account)
Files stay private: PDFs and images are edited in your browser.
AES-256 encryption
The document is encrypted with the strongest standard PDF protection. Without the password, the content is mathematically out of reach.
Granular permissions
Separate owner password and per-action permissions: allow or block printing, copying text, editing and form filling independently.
Runs in your browser
Encryption happens on your device. Your password is never transmitted, stored or logged anywhere.
Encryption, permissions, and where they are applied
AES-256 on your device, plus the four permission flags the PDF format actually defines.
Two passwords, two jobs
The open password locks the content. The owner password keeps the permissions yours to change later.
Strip what the file remembers
Metadata, embedded attachments and JavaScript actions travel with a PDF unless you remove them.
AES-256, applied locally
The document is encrypted in your browser: the password derives the key on your machine and is never transmitted, stored or logged.
Changed your mind?
Unlock removes the protection from a document you have the password for, and lifts permission-only restrictions on your own files.
The password is used locally to decrypt the file.
Two passwords, two jobs
The opening password locks the document itself: no password, no content. The owner password keeps you in control of the rules, change permissions later without sharing the master key.
Permissions that match real sharing
Sending a contract for review? Block editing but allow printing. Sharing a report? Block copying so the text does not get lifted. Each permission is an independent choice, so the protection fits the situation instead of fighting it.
Need to lift the rules from a document you own? The Unlock tool removes the protection once you provide the password.
Done in three steps
Upload your PDF
Drop the file above, it is read locally in your browser, never uploaded to a server.
Use the tool
The editor opens with the right tool selected. Make your changes in a couple of clicks.
Download the result
Save the finished PDF straight to your device. No account, no watermark, no wait.
Frequently asked questions
Documents are encrypted with AES-256, the strongest encryption standard available in the PDF format.
The opening password is required to view the document at all. The owner password controls who can change permissions like printing, copying and editing.
Yes. Printing, copying, editing and form filling are independent permissions you can set separately.
No. Encryption runs entirely in your browser, so the password never leaves your device.