PDF Password Protector & Unlocker
Secure a PDF with AES-256 encryption or remove its password entirely in your browser.
Create a document password
Recipients will need this password whenever they open the protected PDF.
Use 12+ characters with letters, numbers, and symbols.
Advanced: owner password
If left blank, a secure owner key is generated automatically. Save a custom owner password if you may need administrative access later.
How to Use
Choose Protect or Unlock, add your PDF, enter the required password, process it, and download the new document.
Security
Protection uses modern 256-bit AES encryption. Passwords and document bytes remain in your browser memory and are never sent to our server.
Related Tools
Keep confidential documents private
Password protection helps control access when sharing contracts, financial documents, reports, and personal records. The original page streams are preserved, so text remains selectable and visible quality does not change.
Frequently Asked Questions
Is my PDF uploaded? +
No. The PDF and passwords are processed locally with WebAssembly in your browser.
Which encryption is used? +
Protected downloads use modern AES-256 PDF encryption.
Can you recover a forgotten password? +
No. This tool only unlocks a PDF when you provide a valid user or owner password.
Does protection reduce PDF quality? +
No. QPDF applies encryption without rasterizing pages or changing visible content.
What is an owner password? +
It provides administrative access to document security settings. It may differ from the password used to open the PDF.
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