Hi @bodmaishchele ,
Just curious, Is this a government form for work?
I will assume that by signing online, you are referring to using a web browser?
If that would be the case, Although new modern web browsers advertise their PDF rendering capabilities to be able to fill and sign a PDF, it is limited to electronic-based (e-Signature) , not certificate-based digital signatures, specifically secured PDF forms developed in LiveCycle Designer, for example.
If I am not mistaken this is true in both Windows and Linux boxes. In which case, you still need an app capable of rendering PDF objects such as embedded signature field objects.
Even more important, how is the digital signature employed (i.e. self-signed certificate-based digital signature or using a smart card with reader)?
You may be able to experiment with Adobe Sign though.
A subscription is required if you are the creator and sender of the PDF document. If you are the signer it does not.
Personally I haven't check this myself, but since it doesn't require the signer to install Acrobat Pro or Acrobat Reader on their computers , a web browser should do, but it is done using a Cloud Signature Provider.
The form must also be designed to provide the designated signature fields for your intended recipients
See here:
You may also use online self-signed certificate generating websites with or without a a root certificate authority.