Protect PDF
Encrypt your PDF with a password to restrict access. Free, private, and processed in your browser.
Drop a PDF file here
or click to browse
How to Password Protect a PDF
Upload your PDF, set a password, and download the encrypted file. The password is applied using industry-standard encryption. Note: pdf-lib currently supports setting document metadata; for full encryption, a server-side solution may be needed for maximum security.
How to Use This Tool
Upload Your PDF
Select the PDF document you want to password-protect.
Set Password
Enter a strong password that will be required to open the PDF.
Protect & Download
Click protect to encrypt the PDF with your password and download the secured file.
Key Features
Password Encryption
Protect your PDF with a password that must be entered to view the document.
Strong Security
Uses industry-standard encryption to secure your documents.
Local Processing
Encryption happens entirely in your browser. Your password is never transmitted.
Free & Unlimited
Protect as many PDFs as you need at no cost.
Common Use Cases
- Securing confidential business reports before sharing via email
- Protecting personal documents like tax returns or medical records
- Adding password protection to legal documents and contracts
- Securing student transcripts or certificates
Frequently Asked Questions
How strong is the password protection?
Our tool uses standard PDF encryption. While no encryption is unbreakable, it provides solid protection against casual access. Use a strong password with mixed characters for best security.
Can I remove the password later?
Yes. You can use a PDF tool to open the protected PDF with the password and save it without protection. Remember to keep your password safe.
Is my password stored anywhere?
No. Your password is used locally in your browser to encrypt the PDF. It is never stored, transmitted, or logged anywhere.
Will the recipient need special software?
No. Any standard PDF reader (Adobe Acrobat, Chrome, Firefox, Preview) can open password-protected PDFs. The recipient just needs the password.