--- title: "Guides: PDF library for iOS | Nutrient SDK" canonical_url: "https://www.nutrient.io/guides/ios/intro/" md_url: "https://www.nutrient.io/guides/ios/intro.md" last_updated: "2026-06-08T08:09:41.270Z" description: "Welcome to the Nutrient iOS SDK developer guides. These guides show you how to add document functionality to iOS apps using our Swift and Objective-C APIs." --- # iOS guides: Integrate our PDF library Welcome to the Nutrient iOS SDK developer guides. These guides show you how to add document functionality to iOS apps using our Swift APIs for SwiftUI and UIKit. If you’re brand new to Nutrient, have a look at our [get started guides](https://www.nutrient.io/sdk/ios/getting-started.md) to quickly add PDF viewing, annotating, and editing to your application. ## Guides **[PDF viewer](https://www.nutrient.io/guides/ios/viewer.md)**\ How to configure the document viewer **[Open a document](https://www.nutrient.io/guides/ios/open-a-document.md)**\ How to open a PDF from local storage, URL, in-memory data, and more **[Save a document](https://www.nutrient.io/guides/ios/save-a-document.md)**\ How to save a PDF to local storage, remote server, and more **[User interface](https://www.nutrient.io/guides/ios/user-interface.md)**\ How to customize icons, buttons, toolbars, the look and feel, and more **[Annotations](https://www.nutrient.io/guides/ios/annotations/introduction-to-annotations.md)**\ How to import, export, create, edit, sync, flatten, and more **[Forms](https://www.nutrient.io/guides/ios/forms.md)**\ How to fill form fields, extract data, submit, save, create, edit, and more **[Instant synchronization](https://www.nutrient.io/guides/ios/instant-synchronization.md)**\ How to sync annotations across multiple users, devices, or sessions **[Signatures](https://www.nutrient.io/guides/ios/signatures.md)**\ How to add electronic and digital signatures to PDF documents **[Editor](https://www.nutrient.io/guides/ios/features/document-processing.md)**\ How to merge or split documents, manipulate pages, and more **[PDF generation](https://www.nutrient.io/guides/ios/pdf-generation.md)**\ How to generate PDFs from a template, HTML, images, and more **[Conversion](https://www.nutrient.io/guides/ios/conversion.md)**\ How to convert MS Office to PDF, image to PDF, PDF to image, and more **[Extraction](https://www.nutrient.io/guides/ios/extraction.md)**\ How to read text in a PDF, parse content, extract text or pages, and more **[Redaction](https://www.nutrient.io/guides/ios/redaction.md)**\ How to redact content programmatically or by using the UI **[OCR](https://www.nutrient.io/guides/ios/ocr/overview.md)**\ How to make scans searchable, extract text from images, and more **[Document security](https://www.nutrient.io/guides/ios/document-security.md)**\ How to set permissions, add a password, encrypt or decrypt, and more **[Search](https://www.nutrient.io/guides/ios/search.md)**\ How to search for text in documents, pages, annotations, and more **[Compare documents](https://www.nutrient.io/guides/ios/compare-documents.md)** How to visually compare pages of different documents **[Measurement](https://www.nutrient.io/guides/ios/measurements.md)** How to measure area, distance, and perimeter in PDF documents **[Bookmarks](https://www.nutrient.io/guides/ios/bookmarks.md)**\ How to create, edit, and remove bookmarks **[Events and notifications](https://www.nutrient.io/guides/ios/events-and-notifications.md)**\ How to listen for annotation, form, text select, and bookmark events **[Instant JSON](https://www.nutrient.io/guides/ios/importing-exporting/instant-json.md)**\ Learn how to store annotation data in JSON format --- ## Related pages - [Agent skill](/guides/ios/agent-skill.md) - [Best practices](/guides/ios/best-practice.md) - [Mac Catalyst PDF library](/guides/ios/catalyst.md) - [iOS PDF bookmark SDK](/guides/ios/bookmarks.md) - [Cordova PDF library](/guides/ios/cordova.md) - [Compare documents on iOS](/guides/ios/compare-documents.md) - [Contributing to Nutrient projects](/guides/ios/miscellaneous/contributing.md) - [Discover innovative PDF SDK demos for multiple platforms](/guides/ios/demo.md) - [Download our iOS library](/guides/ios/downloads.md) - [iOS PDF library](/guides/ios.md) - [visionOS buides: Integrate our PDF library](/guides/ios/intro-visionos.md) - [Ionic PDF library](/guides/ios/ionic.md) - [iPhone PDF library](/guides/ios/iphone.md) - [iPad PDF Library](/guides/ios/ipad.md) - [Knowledge base](/guides/ios/kb.md) - [Swift PDF library](/guides/ios/swift.md) - [Upgrade and migration guides](/guides/ios/upgrade.md) - [visionOS PDF library](/guides/ios/visionos.md) - [Xamarin.iOS PDF library](/guides/ios/xamarin.md) - [Changelog for iOS](/guides/ios/changelog.md)