Protect PDF
How to password protect a PDF in seconds: lock any file with a password and choose what readers can do — print, copy, or modify. Runs 100% in your browser — your password never leaves your device.
Password Protect PDF — Encrypt & Lock Your Documents
Our free PDF protection tool lets you add password encryption to any PDF and control exactly what recipients can do — print, copy text, or modify the document. Set a user password (required to open) and optionally an owner password with granular permissions, all processed locally in your browser using industry-standard AES-256 encryption. Your file and password never leave your device — no uploads, no server processing, no watermarks.
Why Use Our PDF Password Protection?
- 100% Private: Encryption happens entirely in your browser — your PDF and password never touch a server.
- Granular Permissions: Independently allow or block printing, text copying, and document modification.
- Strong Encryption: Uses AES-256 encryption, the same standard trusted by banks and governments.
- Free & Unlimited: Protect as many PDFs as you need — no sign-up, no watermarks, no limits.
How to Password Protect a PDF
- Upload your PDF to the protection tool.
- Set a user password (minimum 4 characters) required to open the file.
- Choose permissions: allow/block printing, copying, and modification.
- Click Protect & Download — your encrypted PDF saves instantly.
After protecting, you can remove the password later if needed, or compress the protected PDF for smaller file sizes. All tools work together — free, offline, and privacy-first.
Frequently Asked Questions
How do I password-protect a PDF?
Upload the PDF, set a password (at least 4 characters), choose the permissions you want to allow, then press Protect & Download.
What permissions can I control?
You can allow or block printing, copying text, and modifying the document, independently of each other.
What if I forget the password?
The password is only stored locally for the current session. Forgetting it means the file cannot be opened — store it somewhere safe.
Is protecting a PDF free?
Yes. It is completely free with no watermarks and no sign-up.
Are my PDFs or password uploaded?
No. Encryption happens entirely in your browser. Neither the file nor the password ever leaves your device.