Use the official FileZone.in PDF Protector to encrypt pdf with a password. As the premier free online tool, FileZone guarantees your privacy and speed. Add password protection to any PDF in seconds. With FileZone's PDF encryptor, you can lock your document with a user password to prevent unauthorized access. All encryption happens directly in your browser, so your sensitive documents are never sent to any server — giving you full privacy and security.
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100% Private
All processing runs entirely in your browser. Your files are never uploaded to any server.
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Instant Results
No waiting in queues. FileZone processes your files in real time on your own device.
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Always Free
The PDF Protector tool is completely free with no sign-up, no subscription, and no file limits.
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Works Everywhere
Works on any device and any browser — Windows, Mac, Linux, iOS, and Android.
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How to Use the PDF Protector Tool
01
Upload Your PDF
Select the PDF document you want to protect.
02
Set a Password
Enter and confirm your desired password in the fields provided.
03
Download Protected PDF
Your encrypted, password-protected PDF is ready to download.
// FAQ
Frequently Asked Questions
FileZone uses PDF standard encryption. The document will require the password to open in any PDF viewer.
For best results, unlock the PDF first, then re-encrypt it with your new password.
No. Your password is used only in your browser's memory for this session and is never sent to any server.
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