SignXML

XML stands for Extensible Markup Language and it is a format especially used for storing data and settings for files that need to be distributed over the Internet or together with software applications.
Developers who also want to add a digital signature to their XML files can rely on SignXML for this task and some additional ones.

Command-line XML signer

The application does not need to be installed onto the host computer so you can keep it on your removable drive and run it only when you want to digitally sign your files.
It needs to be mentioned from the beginning that the utility run in a Command Prompt window, so you need to be familiarized with the correct syntax in order to benefit from all the functions.
However, if you are not an expert in this area, you can just take the time to analyze the instructions displayed when running it, then experiment a little while until you learn the commands.
Basically, you only need to run the app, then choose the action that you want to perform, such as sign a certain XML file or reindent it before signing. You can also specify the full or partial subject of the code signing certificate that you want to use, otherwise the first valid certificate will be deployed.

Check XML signature

Another function that SignXML comes with is verifying the signature of the XML file you specified - you can also rely on wildcards rather than choose a single file to be processed.
Furthermore, if you use the correct command you can view the list of all available code signing certificates.

Conclusion

All in all, SignXML can come in handy to all users who want to quickly add a digital signature to their XML files, as well as verify the signature or reindent the XML files.