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How to annotate PDF documents using Aspose.PDF REST API?


I had a question regarding your Cloud API - we’re running a .NET stack and were looking into Aspose.pdf for Cloud but could not find any documentation regarding setting (not getting) annotations. If this feature available?

If not, is the .NET standalone version capable of doing so? I found examples for the Android version but wanted to ask here first.



Thank you for contacting support. I’m sorry to share with you that currently using Cloud API you can only retrieve existing annotations from PDF file. Please refer to the following documentation link:

You cannot add/create another annotation with Cloud API. It is not supported. I have logged this feature request under ticket id SAASPDF-109 in our issue tracking system. Your feature request has also been linked to this issue and you will be notified as soon as it is supported. We’re sorry for your inconvenience.

Second, It would be great if you can elaborate a bit more about the specific requirement. It will help us to cater exact feature support.

Well, using .NET standalone version, You can add, delete or set formatting of an annotation. Please refer to helping articles here:

Please do let us know in case of any confusion or questions.


We have implemented creating/adding annotation feature in Aspose.PDF Cloud API. Please check the following documentation for details. Please feel free to contact us for any assistance in this regard.

Working with Annotation in Aspose.PDF Cloud