SignDesk — desktop signing application

Most signing tools make you upload the document somewhere first. SignDesk does not. The file stays on your machine, the signature is made with the certificate you already hold, and nothing travels anywhere it does not need to.

What it signs

PDFs, visibly

Place the signature where it belongs on the page — drag it, size it, choose what it shows, add a handwritten image if you want one. Or sign invisibly and leave the page exactly as it was.

Everything else

Any other file is signed as a separate signature file alongside it, or wrapped together with it into one envelope. Both are the formats European public administrations expect.

Checks other people's signatures

Open a signed document and SignDesk tells you who signed it, when, whether the content has changed since, and whether the certificate behind it was trustworthy at the time.

Works with the key you already have

A smart card, a USB token, a certificate installed on the machine, or a key held for you in the cloud — SignDesk reaches all of them the same way. You pick the certificate; it does the rest.

It never copies your private key, and it never asks you to hand it over. Cards and tokens keep the key where it belongs, and a cloud key stays with whoever holds it for you.

On whatever you run

Windows, macOS, Linux

One application, the same on all three, on both Intel and ARM machines. No browser plugin, no Java runtime, no separate helper to keep updated.

In your language

The interface is translated, and adding a language is a text file rather than a new release.

Offline if you need it

Signing works without an internet connection. Only checking whether a certificate has been revoked needs the network, and the application says plainly when it could not reach it.

Try it on your own documents

The quickest way to know whether SignDesk fits is to sign something real with it. Tell us what you sign and how often, and we will set you up.

Get in touch