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

# 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. ## How to navigate this site - **Per-SDK guides indexes** live at `/guides/<sdk>/llms.txt` — each lists the topic indexes available for that SDK. - **Per-SDK API references** live at `/api/<sdk>/llms.txt` — same shape, for the SDK’s API surface. - Each per-SDK index points at **per-topic sub-indexes** named `/guides/<sdk>/llms-<topic>.txt` (and the matching `/api/<sdk>/llms-<topic>.txt`). Available topics vary per SDK — fetch the per-SDK index to see what each SDK covers. Topic URLs that aren’t listed in a per-SDK index do not resolve (404), so the per-SDK index is the authoritative signal of available topics for that SDK. - For **bulk content ingestion**, see [/llms-full.txt](/llms-full.txt). ## SDK families - [Web SDK guides](/guides/web/llms.txt) · [Web SDK API](/api/web/llms.txt) — JavaScript / WASM PDF SDK (highest-priority surface). - [iOS SDK guides](/guides/ios/llms.txt) · [iOS SDK API](/api/ios/llms.txt) — Swift / Objective-C mobile SDK. - [Android SDK guides](/guides/android/llms.txt) · [Android SDK API](/api/android/llms.txt) — Kotlin / Java mobile SDK. - [React Native guides](/guides/react-native/llms.txt) · [React Native API](/api/react-native/llms.txt) — Cross-platform mobile SDK. - [Flutter guides](/guides/flutter/llms.txt) — Cross-platform mobile SDK. - [.NET MAUI guides](/guides/maui/llms.txt) · [.NET MAUI API](/api/maui/llms.txt) — Cross-platform .NET SDK. - [.NET (GdPicture) guides](/guides/dotnet/llms.txt) · [GdPicture API](/api/gdpicture/llms.txt) — Server-side document toolkit; [DocuVieware](/api/docuvieware/llms.txt) is the HTML5 viewer that pairs with it. - [Java SDK