PDF Protect – Add Password to PDF Free Online
Add password protection to PDF files. Set an open password and restrict copying and editing. Free PDF protector — no upload required.
Click to upload or drag & drop
PDF files up to 50MB
Frequently Asked Questions
The open password is required to view the PDF. The owner password controls permissions like printing and copying. If you only set an open password, it is used for both.
No. All processing happens in your browser using pdf-lib. Your files never leave your device.
The protected PDF will restrict copying text/images, modifying content, and filling forms. Low-resolution printing is allowed.
You would need to unlock it first using the PDF Unlock tool, then re-protect it with a new password.
What is PDF Protect – Add Password to PDF Free Online?
A PDF protector adds password encryption to a PDF file, preventing unauthorized access. You can set an open password (required to view the file) and restrict permissions like copying and editing. Our PDF Protect tool uses the @pdfsmaller/pdf-encrypt library running in your browser.
How to Use PDF Protect – Add Password to PDF Free Online
- 1Upload your PDF file.
- 2Enter the password you want to set.
- 3Optionally restrict copying and editing permissions.
- 4Click Protect.
- 5Download the password-protected PDF.
Key Features
- ✓Set open password
- ✓Restrict copying and editing
- ✓Runs in your browser
- ✓No file upload to server
Benefits
- →Protect confidential documents
- →Prevent unauthorized editing of contracts
- →Secure sensitive PDFs before sharing
Why Use Irreva for PDF Protect – Add Password to PDF Free Online?
Frequently Asked Questions
What type of encryption is used?
The tool uses AES-128 encryption, which is the standard for PDF password protection.
Will my PDF content be visible to anyone else?
No. @pdfsmaller/pdf-encrypt applies encryption entirely within your browser. The password you set and the resulting encrypted PDF are never sent to any external server.
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