Nutrient Document Web Services (DWS) is a cloud-native platform that provides two powerful PDF API services: the Viewer API for browser-based document interactions and the Processor API for headless document workflow processing. Our PDF tools API enables developers to view, annotate, edit, generate, convert, and process documents without managing any infrastructure.

The Nutrient DWS Processor API is a cloud-based document processing API that provides over 30 modular tools for automating document workflows. It's designed for backend operations like PDF generation from HTML and Office files, document format conversion, OCR and data extraction, document editing and manipulation, watermarking and digital signatures, AI-powered redaction, and PDF/A archiving. The API handles everything from simple conversions to complex multi-step document processing workflows — all through simple HTTP API calls without requiring any server infrastructure.

The Nutrient DWS Viewer API is a cloud-based PDF viewer API that enables you to embed fully interactive document viewing experiences directly into your web applications. It supports viewing PDFs, Microsoft Office files (Word, Excel, PowerPoint), and images (PNG, JPG, TIFF) with advanced features like annotations, form filling, electronic signatures, and real-time collaboration—all without requiring any backend infrastructure setup.

The Viewer API is our PDF viewer API for embedding interactive document viewing, annotation, form filling, and signing capabilities directly into web applications. It provides real-time collaboration and client-side rendering. The Processor API is our PDF processing API designed for backend workflows—document generation, conversion, OCR, data extraction, watermarking, and batch processing. Many developers use both APIs together for complete document workflows.

Our API services support a wide range of formats including PDF documents (.pdf), image files (.png, .jpg, .tiff, .webp), and Microsoft Office files (.doc, .docx, .ppt, .pptx, .xls, .xlsx). You can convert between formats, generate PDFs from HTML, and process documents in all these formats through our unified API.

No infrastructure setup required! Both Viewer API and Processor API are fully cloud-hosted and managed. You simply integrate our API with a few lines of code, and we handle all the scaling, security, updates, and maintenance. This lets you focus on building your application instead of managing document processing infrastructure.

Security is built into every layer of our API services. We're SOC 2 Type II certified and GDPR compliant. All data is encrypted in transit (HTTPS) and at rest. We provide configurable access tokens, support for password-protected documents, and digital signatures. Learn more about our security practices .

Absolutely. Our cloud infrastructure automatically scales to handle your workload, from a few documents per day to millions per month. Fortune 500 companies rely on our API for mission-critical applications. You can start on the free tier, upgrade as you grow, and we offer custom enterprise plans for high-volume needs.

Our API services are language-agnostic and work with any framework capable of making HTTP requests. The APIs integrate seamlessly with React, Angular, Vue, Next.js, Node.js, Django, Flask, Spring Boot, .NET, and more. We also offer no-code integration through Zapier .

All paid plans include technical support from our expert team. You'll have access to comprehensive documentation , integration guides, code examples, and our Discord community . Enterprise customers receive priority support with guaranteed response times. We're here to help you succeed with our PDF tools API.

We use a simple credit-based system where 1 credit equals 1 API operation. Different tools consume different credits (for example, HTML to PDF uses 0.5 credits, while OCR uses 2 credits). Plans start at $75/month for 1,000 credits, with volume discounts available. Annual plans save you 10% compared to monthly billing. Unused credits don't roll over. View our detailed pricing page for more information.

Pricing is subscription-based with different tiers depending on your usage needs. You pay monthly or yearly for a specific allocation of viewer sessions, document uploads, storage, and document limits. Annual plans save you 10% compared to monthly billing. View our detailed pricing FAQ for more information.

Yes! Our Processor API includes AI-powered features like document understanding, key-value extraction, and automated redaction. We also offer the Nutrient DWS MCP Server for seamless integration with Large Language Models (LLMs) like Claude, enabling you to create, edit, and process documents using natural language. This makes it easy to build AI-powered document workflows.