Avanquest offers four related but distinct products. Picking the right one up front will save you an integration rewrite later.
- PDF API — a cloud REST API for server-side, one-off or batch document operations (merge, split, convert, OCR, compress, protect) without hosting anything yourself.
- PDF SDK (desktop) — a native library (Windows/Linux, C#/C++) for building document features directly into a desktop or server application, without depending on a hosted API.
- PDF Web SDK / Web Viewer — a JavaScript/WebAssembly toolkit for in-browser or in-app viewing, annotation, form-filling, and signing, available as a ready-made UI component library or as a headless (no-UI) engine.
- PDF Printer — a Windows virtual printer driver that lets any application "print to PDF" as part of an automated workflow.
As a rule of thumb: if your users need to see and interact with a document inside your app, start with the Web SDK's UI Component Library or PDF Viewer. If you're processing documents in the background with no user interface, use the PDF API (if you don't want to manage infrastructure) or the PDF SDK / Headless Web SDK (if you need on-device or server-side processing without calling out to a hosted API).