Encrypt your PDF with a password so only the right people can open it. Strong, secure protection.
Some documents should not be opened by just anyone — contracts, invoices, medical records, ID scans. Protect PDF encrypts your file with a password of your choice, so only people you share the password with can open it. It is a simple, strong way to keep sensitive files private.
Step-by-step guide: Read how to protect pdf with tips & FAQsDrop your PDF onto the Protect PDF tool above, or click to browse and pick it from your device.
Choose a strong password that is hard to guess, and KOIAE encrypts the document so it can only be opened with it.
Download a password-protected PDF in one click. Any files you upload are deleted automatically afterwards.
Yes — Protect PDF is free. There is no account to create, no watermark on your files, and generous daily limits for everyday use.
Drop files here or click to browse