Free · no upload · no account
Sign a PDF with a certificate
Apply a certificate-based digital signature using your own .p12 or .pfx file. Signing runs in your browser, so neither your certificate nor your PDF is uploaded.
Open Digital signature (certificate)Runs in this browser tab. Your file never leaves your device.
How to use Digital signature (certificate)
- Open the PDF to sign.
- Choose your .p12 or .pfx certificate and enter its password.
- Download the digitally signed PDF.
Questions
Is Digital signature (certificate) free in PDFMoose?
Yes. It is free in PDFMoose, with no account, no watermark and no daily task limit.
Are my files uploaded when I sign a PDF with a certificate?
No. The work happens entirely in your browser, so your file stays on your device and is never uploaded.
What certificate files can I use?
PDFMoose accepts a .p12 or .pfx certificate file that you provide.