Adding Comments to PDFs on Web and Mobile

This guide outlines everything you need to know about adding comments to PDFs on web and mobile.

Licensing

Comments require a separate component in your PSPDFKit license. Without this included in your license, your app won’t be able to view, search, or add comments. Please contact our Sales team to add comments to your license.

If you’re a new customer, you can try comments without a license key. If you’re an existing customer, please ask our Sales team for a trial license if you’re interested.

Terminology

Before continuing, it’s helpful to first define some terminology as it relates to comments:

  • root annotation — This is the annotation to which all the comments in a single thread are linked.

  • comment thread — This is a group of comments with the same root annotation.

  • comment — This is a single comment added by any user.

Introduction

All comments are linked to their respective root annotations. The comments with the same root annotation are part of a single comment thread. There can be two types of root annotations:

Getting Started

Adding a Comment

Since there are two types of root annotations, there are two ways you can add comments with the user interface.

Note that, at the moment, we don’t support the addition of comments or comment marker annotations using programmatic APIs. This is something that might change in future.

Deleting a Comment

Information

Comment editing isn’t supported in the current version.

Supported Platforms

Comments are supported on various platforms using PSPDFKit’s SDKs. Learn more by following the links below:

Instant Comments on iOS
Use Instant Comments in your iOS applications

Instant Comments on Android
Use Instant Comments in your Android applications

Instant Comments on Web
Use Instant Comments in your web (browser-based) applications

Instant Comments on Flutter
Use Instant Comments in your Flutter applications

Instant Comments on React Native
Use Instant Comments in your React Native applications