The #1 PDF SDK library for viewing, editing, eSigning, and more

# Nutrient — Intelligent document platform for developers > Developer-first SDKs, cloud APIs, and low-code tools for building, processing, and automating document workflows. Our Web SDK (WASM) and Document Engine power high-fidelity viewing, editing, redaction, conversion, OCR, and AI-assisted tasks across web, mobile, and server environments. ## Key pages (start here) - [Web SDK (WASM) overview](https://www.nutrient.io/guides/web/) — Standalone, client-side PDF viewer/editor with annotations, forms, redaction, and more. - [Document APIs overview](/api/) — Browse Nutrient DWS document APIs for PDF, OCR, conversion, extraction, security, and AI workflows. - [DWS Processor API overview](/api/processor-api/) — Cloud document processing API for PDF generation, conversion, OCR, redaction, extraction, PDF/A, signatures, and more. - [DWS Processor pricing](/api/pricing/processor-api/) — Credit-based pricing, free-trial path, and production-evaluation guidance for Document Web Services. - [Processor API pricing per tool](/api/pricing-per-tool/) — Connect exact DWS workflows like OCR, HTML-to-PDF, extraction, and redaction to per-tool credit pricing, calculators, and commercial evaluation paths. - [DWS Processor getting started](/guides/dws-processor/getting-started/) — Create an account, get your API key, and make your first request. - [DWS Viewer API overview](/api/viewer-api/) — Cloud document viewing API for secure browser-based rendering, annotations, forms, signing, and collaboration. - [DWS Viewer pricing](/api/pricing/viewer-api/) — Viewer-session pricing, free-trial path, and evaluation guidance for embedded document viewing. - [DWS Accessibility API overview](/api/accessibility-api/) — Cloud PDF accessibility API for auto-tagging and validation workflows. - [DWS Accessibility pricing](/api/pricing/accessibility-api/) — Quota-based pricing for PDF/UA auto-tagging and validation workflows. - [HTML-to-PDF API](/api/html-to-pdf-api/) — Convert