Protect PDF with Password
Add a password to your PDF with AES-256 encryption. Everything is processed in your browser — the file is never sent to any server.
Drop a PDF here
or click to choose
Keep your password safe — it cannot be recovered later.
0 bytes sent — this file never leaves your computer
In doubt? Open DevTools (F12) → Network tab: no upload occurs.
How it works
1
Upload the PDF
One file at a time.
2
Choose a Password
Confirm to avoid typos.
3
Download
PDF protected with AES-256.
Related tools
Frequently asked questions
How to password protect a PDF for free?
Upload the PDF, set your password, and download the protected file. Password protecting a PDF is free, no registration required, and done entirely in your browser.
Is the PDF password saved on a server?
No. Encryption is applied in your browser; neither the file nor the password is sent anywhere. Only someone with the password you set can open the PDF.
What type of protection is applied to the PDF?
The PDF is encrypted with an opening password, requiring the code to view its content. All for free, no registration, 100% in your browser, without sending your document to servers.