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ZingPDF

Commercial PDF toolkit for .NET·zingpdf.dev

ZingPDF is a commercial .NET library for loading, editing, creating, templating, extracting, redacting, filling and flattening forms, signing, encrypting, and saving PDFs. It offers a fluent authoring API, Liquid HTML template rendering to PDF, AcroForm handling, and text extraction through a single .NET API. The core package targets .NET 8 and runs on Windows, Linux, and macOS, with optional add-on packages for HTML rendering, Google Fonts, and OCR.

What it's for

Loading and inspecting existing PDF documentsCreating new PDFs from scratch with a fluent authoring APIMerging, splitting, rotating, and watermarking PDF pagesGenerating documents (e.g. invoices) by rendering Liquid HTML templates to PDFFilling, creating, and flattening AcroForm form fieldsSigning existing or hidden validation-only form fieldsExtracting plain text from PDFsRunning OCR on scanned or image-based PDF pagesRedacting supported page textEncrypting and password-protecting PDFsUpdating PDF metadata

Features 17

Add text, images, vector paths, watermarks, and fonts
Append, insert, delete, rotate, and merge pages
Authenticate encrypted PDFs
Create blank PDFs
Extract plain text from PDFs
Fill, create, and flatten AcroForm form fields
Fluent PDF authoring via Pdf.New()
Google Fonts support via ZingPDF.GoogleFonts
HTML-to-PDF conversion via ZingPDF.FromHTML
Incremental saving and rewriting to a clean latest state
Load existing PDFs from streams
OCR for scanned or image-based pages
Password-protect and encrypt PDFs
Render Liquid HTML templates to PDF
Sign existing or hidden validation-only form fields
Structurally redact supported page text
Update PDF metadata

At a glance

free tierAPI

TypeLibrary / SDK

DeploymentInstalled (local)

PlatformsWindows, Linux, macOS

For.NET developers

CompanyZingPDF

Integrations

Fluid

Resources

Pricing

Non-commercial evaluation is free with no fixed trial period. Commercial use requires a seat-based paid subscription; exact per-seat pricing is not publicly listed and custom terms/invoicing are available on request.

Free to evaluateFree

A paid plan is only needed once commercial use begins.

For trial, evaluation, and other non-commercial work only; no fixed trial period.

Seat-based commercial licenseQuote

Custom terms and invoicing available on request for procurement or larger seat counts.

Number of seats is chosen to match team size; exact price not publicly listed.