Protect PDF
Add password protection and encryption to a PDF. 100% free, no signup.
This server doesn't have qpdf or Ghostscript installed, so files are protected with a built-in 128-bit RC4 encryption (the classic PDF standard — opens in every PDF reader). Install qpdf on the server for stronger 256-bit AES encryption.
Drop a PDF here, or browse a file
Maximum size: 50 MB
document.pdf
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About the encryption
Files are protected with 256-bit AES encryption (the current PDF standard) when qpdf is available on the server, or Ghostscript's PDF encryption as a fallback. If you forget this password, the file cannot be recovered — there is no backdoor.