Protect PDF with Password
Add password protection to PDF documents. Set permissions for printing, copying, and modifying. Free online PDF encryption tool.
Free PDF password protection. Encrypt PDFs with custom permissions for printing, copying, and editing. Secure encryption in browser.
- ✓ Set user and owner passwords
- ✓ Control printing, copying, modifying permissions
- ✓ Strong PDF encryption
- ✓ Encrypted locally in browser
- ✓ Password never sent to any server
How to Protect a PDF with Password
- 1 Upload the PDF file you want to protect
- 2 Enter a strong password and confirm it
- 3 Set optional permissions for printing, copying, and modifying
- 4 Click 'Protect PDF' to encrypt your document
- 5 Download your password-protected PDF file
Frequently Asked Questions
Can I merge PDFs without uploading them? ▼
Yes! MagicKit processes all PDFs directly in your browser using pdf-lib. Your files never leave your device.
Is there a file size limit? ▼
No strict limit. Since processing happens in your browser, larger files may take longer but there's no server-imposed restriction.
Will the PDF quality be reduced? ▼
No. MagicKit preserves the original quality of your PDFs. Compression is only applied when you explicitly choose it.
Can I process password-protected PDFs? ▼
Yes, use our PDF Unlock tool to remove passwords, or enter the password when prompted in other tools.
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Last updated: January 15, 2026 · v2.1