Password-Protect PDF Online — Free & Private
Privacy-First PDF Tools
Drop your PDF file here
Supported: PDF files
FAQ
What type of encryption is used?
PDFGem writes PDF 1.7 Standard security revision 4 with an AESV2 crypt filter and a 128-bit key: AES-128.
What's the difference between user and owner password?
The user password is required to open the PDF. The owner password sets permission flags, but their enforcement depends on the PDF reader.
Can I restrict printing or copying?
You can request restrictions on printing, modifying, copying, and annotations. These flags are enforced by compatible readers and may be ignored by other software.
Is my password stored anywhere?
No. Your password is used only during encryption in your browser and is never sent to any server.
Can the protection be removed later?
Yes, with the correct password and supported encryption. Unlocking or otherwise re-saving a certificate-signed PDF can invalidate its digital signature.