Password Protect PDF Online
Encrypt your PDF with a password to prevent unauthorized access. Protect sensitive documents in seconds.
Coming Soon — Enhanced Encryption
We are working on a more secure PDF encryption implementation. This feature will be available very soon.
Drop your PDF here or click to upload
PDF files only — max 10MB free / 100MB Pro
ToolSnap PDF Password Protect is a free online tool that lets you encrypt any PDF with a password — no software installation, no account required. Once protected, the PDF will require the password to open, preventing unauthorized access. This is ideal for securing contracts, financial documents, personal records, and any sensitive file you need to share safely. Simply upload your PDF, set a password, confirm it, and download your encrypted file. Your document is processed securely and deleted immediately — we never store your files.
How to Password Protect a PDF
- Upload your PDF by dragging it into the box or clicking to select
- Enter a strong password (minimum 4 characters)
- Confirm the password in the second field
- Click "Protect PDF with Password" and download your encrypted file
Frequently Asked Questions
Is this PDF password tool free?
Yes, completely free. No account required.
What happens if I forget the password?
There is no way to recover a lost PDF password. Make sure to store your password securely before encrypting.
What encryption does this tool use?
The tool uses pdf-lib's built-in encryption which applies AES-based PDF encryption, requiring the password to open the file.
What is the maximum file size?
Free users can protect PDFs up to 10MB. Pro users get up to 100MB.
Are my files stored on your servers?
No. Your PDF is processed and immediately deleted. We never see or store your password or document.