🔐 PDF Security

Password Protect PDF Online

Encrypt your PDF with a strong password. Restrict printing, copying, and editing — free and instant.

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Drag & drop your PDF here or browse file

🔑 Set Password

🛡️ Permissions

Allow Printing
Allow Copying Text
Allow Editing
Allow Annotations

Why Use KJSynthora PDF Protect?

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256-bit Encryption

Industry-standard AES encryption to keep your files safe.

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Granular Permissions

Choose exactly what viewers can and cannot do with your PDF.

No Signup Needed

Protect PDFs without creating any account.

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Browser-Only

Your file never leaves your device. 100% private processing.

Frequently Asked Questions

How do I password protect a PDF for free?

Upload your PDF, enter a password, set permissions for printing/copying/editing, and click "Protect & Download". Your secured PDF is ready instantly.

Is it safe to protect my PDF online?

Yes. All encryption is done locally in your browser using JavaScript. Your file is never uploaded to any server.

Can I restrict printing or copying on a PDF?

Yes. Use the Permissions section to toggle printing, text copying, and editing on or off before protecting your PDF.