Digital signature
Sign a PDF with a digital certificate.
- Add files
- Edit
- Review
- Result
Runs on your device. Your file is not uploaded.
How to use Digital signature
- Choose or drop one PDF.
- Choose your .p12 or .pfx certificate file and type its password.
- Press Sign with certificate and download. Open it in a PDF reader to see the signature.
Is this a qualified electronic signature?
No. It is a basic PAdES signature (B-B level) made with your own certificate file, with no trusted timestamp. It proves the file hasn't changed since you signed it. It is not an EU-qualified signature under eIDAS. Your certificate and password never leave your device.
Works well with Digital signature
Explore all Secure tools- Verify PDF signaturesCheck the digital signatures in a PDF and whether it changed after signing.
- Protect PDFEncrypt a PDF with a password so only people who know it can open it.
- PDF to PDF/AMake an archive-ready PDF/A copy of your document and check how it conforms.
- Sign PDFDraw, type or upload your signature and place it on a PDF.
- Compress PDFReduce the file size of your PDF, with control over image quality.
- Request signaturesAdd signers and fields to a PDF, choose the order and send it for signing.
Put your pages in order
Merge, split, reorder, rotate and number pages. All on this device.
Runs in your browser, so your file is not uploaded.
Questions
Are my files uploaded?
Runs in your browser, so your file is not uploaded.
Is Digital signature free?
Yes. No signup and no watermark.
Will it work on an old phone?
Yes for most files. On low-memory phones files up to 20 MB are safest; above your device's limit you get a warning and can try anyway.
Does it work on Mac, Windows, iPhone and Android?
Yes. It runs in any current browser, so there is nothing to install on any of them.