Digitally sign PDF

Sign a PDF with your own certificate, so any reader can verify it.

Drop a PDF here

Pages appear straight away — nothing is sent anywhere.

Read on this device. No account, no upload.

Settings

Nothing starts until you press the button, and nothing is sent when it does.

Your certificate

Certificate file

Your own PKCS#12 file, usually named .p12 or .pfx. It is opened on this device and never sent anywhere.

If your certificate looks greyed out

Some systems do not label these files, so the picker hides them. Switch the picker to all files and the certificate becomes selectable.

Passphrase

Unlocks your certificate on this device. Neither the passphrase nor the key it unlocks is stored, sent, or put in a link.

Choose the certificate that signs this document.

What the signature says

Reason

Written into the signature and shown by software that verifies it.

Location

Contact

On the page

InvisibleRecommendedIn the file onlyReaders show it in their signature panel. Nothing is drawn on the page.Visible blockDrawn on one pageAdds a block a reader can see. It carries no more weight than the invisible one.

Add a file to start

Runs in this tab. Your file is not uploaded.

Your account