---
title: "Guides: PDF library for Flutter | Nutrient SDK"
canonical_url: "https://www.nutrient.io/guides/flutter/intro/"
md_url: "https://www.nutrient.io/guides/flutter/intro.md"
last_updated: "2026-05-15T09:08:03.624Z"
description: "Welcome to the Nutrient Flutter SDK developer guides. These guides show you how to add document functionality to Flutter apps."
---

# Flutter guides: Integrate our PDF library

Welcome to the Nutrient Flutter SDK developer guides. These guides show you how to add document functionality to Flutter apps.

If you’re brand new to Nutrient, have a look at our [get started guides](https://www.nutrient.io/sdk/flutter/getting-started.md) to quickly add PDF viewing, annotation, and editing to your application.

## Guides

**[PDF viewer](https://www.nutrient.io/guides/flutter/viewer.md)**

How to configure the document viewer

**[Open a document](https://www.nutrient.io/guides/flutter/open-a-document.md)**

How to open a PDF from local storage

**[Save a document](https://www.nutrient.io/guides/flutter/save-a-document.md)**

How to save a PDF to local storage

**[Save as](https://www.nutrient.io/guides/flutter/save-a-document/save-as.md)**

How to save a document as a new file

**[User interface](https://www.nutrient.io/guides/flutter/user-interface.md)**

How to customize toolbars, localize for different languages, and more

**[Annotations](https://www.nutrient.io/guides/flutter/annotations.md)**

How to import, export, create, edit, and flatten annotations, and more

**[Forms](https://www.nutrient.io/guides/flutter/forms.md)**

How to fill form fields, extract data, flatten, and more

**[Redaction](https://www.nutrient.io/guides/flutter/redaction.md)**

How to redact content programmatically or by using the UI

**[Instant synchronization](https://www.nutrient.io/guides/flutter/instant-synchronization.md)**

How to sync annotations across multiple users, devices, or sessions

**[Signatures](https://www.nutrient.io/guides/flutter/signatures.md)**

How to add electronic and digital signatures to PDF documents

The digital signature functionality isn’t directly accessible within Nutrient Flutter SDK. To implement it, leverage the capabilities of the underlying platform — [Web](https://www.nutrient.io/guides/product-archives-and-deprecated-solutions.md), [iOS](https://www.nutrient.io/guides/ios/knowledge-base/invisible-signature.md), or [Android](https://www.nutrient.io/guides/android/features/digital-signatures.md).

**[PDF generation](https://www.nutrient.io/guides/flutter/pdf-generation.md)**

How to generate PDFs from a template, HTML, images, and more

**[Measurement](https://www.nutrient.io/guides/flutter/measurements.md)**

How to measure area, distance, and perimeter in PDF documents

**[Events and notifications](https://www.nutrient.io/guides/flutter/events-and-notifications.md)**

How to listen to events that are dispatched when interacting with the UI
---

## Related pages

- [Flutter PDF bookmark SDK](/guides/flutter/bookmarks.md)
- [Explore advanced PDF capabilities with demos](/guides/flutter/demo.md)
- [Dart PDF library](/guides/flutter/dart.md)
- [Download Flutter library](/guides/flutter/downloads.md)
- [Bridge Nutrient native Android, iOS, and Web APIs in Flutter](/guides/flutter/customize.md)
- [Changelog for Flutter](/guides/flutter/changelog.md)
- [Flutter PDF library](/guides/flutter.md)
- [Knowledge base](/guides/flutter/kb.md)
- [Open PDF files in Flutter](/guides/flutter/open-a-document.md)
- [Troubleshooting](/guides/flutter/troubleshoot.md)
- [Upgrade and migration guides](/guides/flutter/upgrade.md)