Protect PDF
Add password protection to your PDF documents — processed in your browser
Drop a PDF here
or click to browse — add password protection
Why protect your PDF?
Control Access
Prevent unauthorized users from opening, reading, or sharing your confidential documents.
Document Security
Add a layer of security to contracts, financial reports, legal documents, and personal files.
Safe Sharing
Share documents via email or cloud storage with confidence — only people with the password can open them.
How it works
Upload PDF
Drop your PDF into the upload area or click to browse your files.
Set Password
Enter a strong password and confirm it. Minimum 4 characters required.
Protect
Click "Protect PDF" to embed password metadata into the document.
Download
Download your protected PDF and share it securely.
Who uses this tool?
Legal
Protect confidential contracts, agreements, and legal documents before sharing.
Business
Secure financial reports, business plans, and internal documents.
Academics
Protect research papers, theses, and academic submissions.
Personal
Secure personal documents like tax returns, medical records, and ID scans.
Frequently Asked Questions
How strong is the protection?
The free plan embeds password metadata. For AES-256 encryption, upgrade to Pro for server-side protection that opens with the password in Adobe Reader.
Will the password work in Adobe Reader?
Free plan uses metadata-level protection. Pro plan adds true PDF encryption compatible with all standard PDF readers.
Can I remove the protection later?
Yes — use the Unlock PDF tool with the same password to remove protection and access the original document.
Is my document safe during processing?
All processing happens in your browser. Your PDF never leaves your device.
About this tool
VisualDocs's PDF protection tool embeds password metadata client-side. For enterprise-grade AES-256 encryption, Pro plan offers server-side protection compatible with all PDF readers.