Protect PDF
Add a password to a PDF — encrypted in your browser, never uploaded
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Drop a PDF or click to upload
About Protect PDF
Add a password to a PDF so it can only be opened by people who know it. Encryption happens in your browser.
How to use the protect pdf
- Upload your PDF.
- Choose a password.
- Download the encrypted, password-protected PDF.
Frequently asked questions
What encryption is used?
The PDF is encrypted with a standard password so viewers must enter it to open the file. Keep the password safe — it cannot be recovered here.
Are my files uploaded to a server?
No. Everything runs locally in your browser, so your files and text never leave your device.
Is this tool free?
Yes, completely free with no signup, watermarks or limits.