PDF Collaboration Library for Android

PSPDFKit Instant is our prebuilt solution for synchronizing annotations across multiple concurrent users, devices, or sessions. It offers developers a self-hosted solution that handles document viewing on any platform, data management, conflict resolution, version tracking, diffing, and merging. It’s a licensable component that’s included as part of PSPDFKit Server.

Launch Demo

PSPDFKit SDKs are deployed in some of the world’s most popular applications, such as those made by PlanGrid, Disney, DocuSign, Dropbox, IBM, and Lufthansa.

Key Capabilities

  • Realtime — Sync edits & annotations to a server or across devices

  • Self-hosted — Maintain complete control over your data

  • Clients — Seamless web, mobile, and desktop viewer integration

  • Conflict resolution — Handle simultaneous concurrent edits

  • Secure authentication — Easy integration with existing systems

  • Data management — Separate layer for annotation and form data

  • User permissions — Fine-grained control

Guides for Instant Synchronization

Get Started with PSPDFKit Instant
How to get started with PSPDFKit Instant

Learn how authentication works

Learn about the Instant API and how to use it for displaying documents

Annotation Sync
How to configure annotation synchronization to PSPDFKit Server

Instant Layers
Learn about Instant layers and how they can be used

How to view, add, and delete comments in PDF documents

Offline Support
Learn how Instant works with offline devices or unstable connections

Document State
Learn how a document transitions to different states over its lifecycle

Free Trial

  • Unlimited trial usage

  • Guidance and tech support from developers

  • Get started