PDF VIEWER
View documents with high fidelity in a well-designed PDF viewer
Create a seamless user experience in any app environment with robust, high-performance PDF viewing capabilities — including multi-format support, responsive rendering, and interactive user interfaces.
Use cases
Optimize PDF rendering
Integrate fast, high-performance PDF rendering into your application — even for complex documents with multiple pages and high-resolution content. Our rendering engine preserves complex layouts, fonts, and graphics, ensuring documents appear consistently across devices and screen sizes.
Add search functionality to PDFs
Add powerful indexed search functionality to help users quickly locate specific terms or phrases within large PDFs. See how intuitive the user interface is, and explore other features, like annotation, high-fidelity rendering, and document management.
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Integrate form viewing and filling in your PDFs
Seamlessly integrate PDF form viewing and filling capabilities directly within your app across web and mobile platforms. Encourage collaboration with support for comments and stamps, allowing users to interact with documents directly.
Customize the PDF viewer UI
Tailor the PDF viewer’s UI and features to meet your app’s requirements, such as custom toolbars, navigation, and annotation tools.
Relied upon by industry leaders
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How we help
Viewer
Deliver seamless PDF viewing experiences
Deliver seamless PDF viewing experiences
Enable fast, responsive PDF rendering with customizable viewing options, supporting high-resolution documents, multipage navigation, and advanced zoom. Boost user engagement with interactive features like annotations, bookmarks, and form handling, all in a configurable, intuitive interface.
Deployment options
Learn more about the different client-side and server-side deployment types for our Web viewer using Document Engine. Whether you want to integrate our SDK into educational platforms to enable students to annotate lecture notes, or allow your legal professionals to review and comment on lengthy contracts, we make it seamless for you to put your use cases into action.
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Frequently asked questions
What is the Nutrient PDF viewer SDK?
The Nutrient PDF viewer SDK is a high-performance, fully customizable software development kit that enables developers to integrate a powerful PDF viewing experience into web, mobile, or desktop applications. It supports smooth rendering, responsive design, and advanced features like annotations, bookmarks, dark appearance, and precise zoom controls to meet diverse document interaction needs.
How does the PDF viewer SDK ensure high-fidelity rendering across different browsers and devices?
The PDF viewer SDK has built-in mobile support for displaying your PDFs. It comes with a responsive UI that works on all screen sizes. The UI adapts to the screen automatically, providing you with a seamless experience. It provides the same features on desktop, tablet, and mobile views.
How easy is it to integrate the PDF viewer SDK into my app?
Integrating the PDF viewer SDK into your app is straightforward and efficient. Nutrient provides easy-to-follow documentation and APIs that allow you to embed the PDF viewer in your web, mobile, or desktop app with just a few steps. You can also customize the UI to match your app’s design and add advanced features like text search and annotation support.
Can Nutrient's Web Viewer SDK be customized to match our brand’s UI/UX design?
Nutrient Web Viewer SDK makes it easy to customize every part of the user interface. Our robust API for configuring behavior and appearance lets you hide or add buttons, change the theme to match your look and feel, trigger workflows, create overlays, and much more. See our user interface customization guide for more details.
What customization options does the PDF viewer SDK offer?
The SDK offers extensive customization options for the viewer interface. You can adapt the toolbar placement, color schemes, and navigation elements to align perfectly with your app’s branding and user experience. Additionally, developers can customize features such as bookmarks, outline navigation, and optional content layers to tailor the viewer to specific app requirements.
How secure is the PDF viewer SDK, and what security features are included?
The Nutrient SDK is based on an optimized fork of PDFium, the most trusted platform for PDF rendering. PDFium is the same PDF engine used in Chromium, Android, and countless other applications. The PDFium project is backed by Google, Microsoft, Amazon, and Dropbox.
The PDF web viewer SDK is developed with a security-conscious approach. Encrypted PDFs are supported, and they cannot be accessed without the matching password. PDF passwords are never persisted, and code commits undergo peer review and extensive testing before being merged.
Our SDK is compatible with major operating systems, including Windows, macOS, and Linux. We also offer APIs for popular languages such as JavaScript, Python, and C# to minimize the external dependencies required, simplifying the integration process.
Is the PDF viewer SDK accessible for all users?
Yes. Accessibility is a key focus of the PDF viewer SDK. It uses WCAG-compliant HTML rendering to ensure the viewer is accessible, particularly for users with disabilities. The responsive design and full touch support also make it usable across all device types and screen sizes, providing an inclusive and smooth user experience.
How easy is it to integrate the JavaScript PDF Viewer with other tools and frameworks, such as React or Angular?
Our Web Viewer SDK is compatible with any JavaScript framework, including React, Next, Angular, Vue, Svelte, Blazor, Solid, Nuxt.js, and jQuery. It’s also compatible with Electron, ASP.NET, PHP, Laravel, and Rails, as well as plain HTML5, JavaScript, and TypeScript.
What are the system requirements for integrating the JavaScript PDF Viewer into a web app?
Nutrient Web Viewer SDK can be operated either as a standalone JavaScript PDF library that runs entirely on the client, or together with Document Engine. Both operational modes support all commonly used browsers in their latest versions. Our Web Viewer SDK uses WebAssembly to render documents. Refer to our Real-World WebAssembly Benchmark to test the performance of your browser and OS, or learn more in the performance guide.
PDF viewer SDK
What is a PDF viewer SDK?
A PDF viewer SDK lets developers embed high-performance PDF viewing into their applications. It allows users to open, read, and interact with PDF files inside your software, without needing third-party viewers. Nutrient’s PDF viewer SDK delivers smooth, responsive rendering and supports interactive features like annotations, form filling, and document navigation across platforms.
- High-fidelity rendering for PDFs of all sizes and complexities.
- Supports annotations, bookmarks, form fields, and links.
- Cross-platform support for web, mobile, and desktop apps.
- Customizable viewer UI with full API access.
- Built-in support for accessibility and keyboard navigation.
How to choose the right PDF viewer SDK?
Choosing the right viewer depends on how deeply you want to integrate document viewing into your application — and what kind of user experience you want to deliver. Here’s what to consider:
- Rendering performance — Can it handle large or complex PDFs without lag?
- Feature set — Does it support annotations, bookmarks, fillable forms, and embedded media?
- Cross-platform compatibility — Does it work on web, iOS, Android, and desktop?
- Customizability — Can you tailor the UI to fit your app’s look and feel?
- Security and compliance — Are documents protected and handled securely?
What are the best solutions to solve my PDF viewing problem?
There are several players in the space, but not all deliver the same level of control, speed, or user experience. Here’s how the top solutions stack up:
- Nutrient SDK — Full-featured, fast, and developer-friendly, with a clean UI and deep customization.
- Apryse (PDFTron) SDK — Enterprise-grade with broad capabilities but more complex to integrate.
- Adobe Acrobat SDK — Robust viewer with limited UI flexibility and more overhead.
- Foxit PDF SDK — Lightweight and efficient, though not as flexible for advanced UI needs.
What are the benefits of using Nutrient’s PDF viewer SDK?
Nutrient’s SDK offers a powerful, customizable viewing experience that’s easy to embed and scale, no matter your app architecture.
- Lightning-fast rendering — Optimized engine for smooth scrolling and zooming.
- Full document interaction — View, annotate, navigate, fill forms, and more.
- Custom viewer UI — Adapt the interface to your app’s branding or user needs.
- Built for developers — Clean, well-documented API with fast implementation.
- Works everywhere — Seamless performance on web, iOS, Android, and desktop.
How does Nutrient’s SDK compare to other PDF viewer solutions?
Nutrient’s SDK outshines many competitors with its balance of performance, flexibility, and ease of use — especially for teams that want full control without a steep learning curve.
- More UI control — Modify toolbars, panels, navigation, and themes with ease.
- Better developer experience — Fewer dependencies and easier setup.
- Superior rendering — Handles complex PDFs without delays or memory issues.
- Rich feature set — Includes bookmarks, comments, forms, links, and more.
- Compliance-ready — Built with security and accessibility in mind.