Protect PDF
Add a password to a PDF file online for free. Protect your PDF with encryption instantly.
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PDF only · Max 100 MB · Password will be added instantly
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PDF Protected!
Protect PDF with Password — Free Online Tool
Add password protection to any PDF document online for free. Our tool encrypts your PDF so only people with the correct password can open it. All processing happens in your browser — your files are never sent to any server.
Protect PDF — FAQs
Yes. AES-256 encryption is applied to your PDF. The password-protected file will require the correct password to open in any PDF viewer.
Yes. Use the "Unlock PDF" tool on this site — upload the password-protected file, enter the password, and download the unlocked version.
There is no way to recover a forgotten PDF password without brute-force tools. Please store your password safely.
PDF files up to 100 MB are supported. All processing happens in your browser — no uploads to servers.