---
title: "Flutter PDF collaboration library | Nutrient SDK"
canonical_url: "https://www.nutrient.io/guides/flutter/instant-synchronization/"
md_url: "https://www.nutrient.io/guides/flutter/instant-synchronization.md"
last_updated: "2026-05-30T02:20:01.293Z"
description: "Learn how to achieve Instant synchronization in Flutter with our comprehensive guide. Discover the secrets to real-time data updates now!"
---

# PDF collaboration library for Flutter

Nutrient 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 [Document Engine](https://www.nutrient.io/guides/document-engine.md), which can be used together with Web SDK.

[Try for Free](https://www.nutrient.io/try)

[Free Trial](https://www.nutrient.io/try/)




## Key capabilities

- **Real time** — Sync edits and annotations to a server or across devices

- **Self-hosted** — Maintain complete control over your data

- **Device agnostic** — Consistent UX across web, mobile, and desktop clients

- **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 over what users can see or edit

## Guides for Instant synchronization

**[Get started with Nutrient Instant](https://www.nutrient.io/guides/flutter/instant-synchronization/get-started.md)**\
How to get started with Nutrient Instant

**[Authentication](https://www.nutrient.io/guides/flutter/instant-synchronization/authentication.md)**\
Learn how authentication works

**[Usage](https://www.nutrient.io/guides/flutter/instant-synchronization/usage.md)**\
Learn about the Instant API and how to use it for displaying documents

**[Annotation sync](https://www.nutrient.io/guides/flutter/instant-synchronization/annotation-sync.md)**\
How to configure annotation synchronization to Document Engine

**[Instant layers](https://www.nutrient.io/guides/flutter/instant-synchronization/instant-layers.md)**\
Learn about Instant layers and how they can be used

**[Comments](https://www.nutrient.io/guides/flutter/instant-synchronization/comments.md)**\
How to view, add, and delete comments in PDF documents

**[Offline support](https://www.nutrient.io/guides/flutter/instant-synchronization/offline-support.md)**\
Learn how Instant works with offline devices or unstable connections

**[Document state](https://www.nutrient.io/guides/flutter/instant-synchronization/document-state.md)**\
Learn how a document transitions to different states over its lifecycle

**Call to Action**

Start your free trial for unlimited access and expert support.

[Learn More](https://www.nutrient.io/sdk/flutter/getting-started.md)
---

## Related pages

- [Sync PDF annotations in Flutter apps](/guides/flutter/instant-synchronization/annotation-sync.md)
- [Create PDF annotation layers in Flutter](/guides/flutter/instant-synchronization/instant-layers.md)
- [Client authentication in Nutrient Instant](/guides/flutter/instant-synchronization/authentication.md)
- [Integrating real-time collaboration into your Flutter application](/guides/flutter/instant-synchronization/get-started.md)
- [Adding Instant comments to PDFs in Flutter](/guides/flutter/instant-synchronization/comments.md)
- [Instant sync and document state in Flutter](/guides/flutter/instant-synchronization/document-state.md)
- [Offline PDF annotations with automatic sync](/guides/flutter/instant-synchronization/offline-support.md)
- [Nutrient Instant usage](/guides/flutter/instant-synchronization/usage.md)
- [NutrientInstantView widget](/guides/flutter/instant-synchronization/instant-view.md)