Sign a PDF with your certificate.
plume · local · secure/digital-signature · works offline
A certificate signature runs your PDF through SHA-256 and seals that hash with the private key in your .p12 or .pfx file, so Acrobat and other readers can verify it and any later edit shows as invalid. Open the PDF, enter your certificate password, optionally place a visible stamp, then Sign & download. The file, certificate and password never leave this tab.
1
Open your PDF
Drop in the document to sign. It never leaves your device.
2
Unlock your certificate
Pick your .p12 / .pfx file and enter its password. Both stay in this tab's memory only.
3
Sign PDF
Optionally place a visible signature stamp, then download the cryptographically signed PDF.
Processed on your deviceNo uploads, everNo sign-up & free
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