Protect PDF — Free
Password-protect and encrypt your PDF. Free to run. No card. Email only if you want to download. Add email later for larger uploads or e-signature.
Drop your file here
or click to browse · .pdf · Max 25 MB per file
How to Protect PDF
Upload your PDF
Set a password
Choose permissions (print, copy, edit)
Download protected PDF
Common questions
Frequently Asked Questions
How do I password protect a PDF for free?
Upload your PDF to ZiaSign, set a password, choose permissions (allow/block printing, copying, editing), and download the encrypted PDF. Free to run. No card. Email only to download.
What encryption is used?
AES-256, the same standard used by banks, governments, and military organizations. Your PDF is securely encrypted.
Can I allow printing but block editing?
Yes. You can set granular permissions — allow printing while blocking editing, copying, or other actions.
Does the PDF protector add a watermark?
No. ZiaSign never adds watermarks. Your encrypted PDF looks exactly like the original.
Next step
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