Free tool

Sign a PDF with a digital certificate

Sign your PDF documents with your digital certificate (.p12 or .pfx) in seconds, free and with no sign-up. And most importantly: your certificate and its password never leave your browser, they are not uploaded to any server. Upload the PDF, upload your certificate, type the password and download the signed PDF.

🔒 Privacy: your certificate, its password and the PDF are NOT uploaded anywhere. Everything happens in your browser.

How it works

  1. 1Upload your PDF and certificateThe document and your .p12 or .pfx file.
  2. 2Type the passwordYour certificate's password. Used only in your browser.
  3. 3Download the signed PDFReady to send or submit.

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Frequently asked questions

Is signing the PDF free?
Yes, sign as many PDFs as you like for free and without signing up.
Is my certificate or password uploaded?
No, never. All signing happens in your own browser. Neither your certificate, nor its password, nor the PDF is sent to any server.
What certificate do I need?
A digital certificate in .p12 or .pfx format, the one you export from your browser or certificate manager.
Is the signature valid?
A standard digital signature with your certificate is embedded in the PDF. Legal validity depends on your certificate and where you submit it. Check the signature in your PDF viewer (for example Adobe) before using it for an official procedure.

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