Despite countless file formats, PDF remains the gold standard for contracts, statements, reports, invoices, and e-books. Universally readable and hard to tamper with, PDFs empower organizations to share pixel-perfect documents—yet manipulating them programmatically has long required expensive, heavyweight toolkits.

Doconut PDF Viewer

Doconut changes the game with an all-in-one PDF toolkit—viewing, annotating, redacting, merging, splitting, and form filling—wrapped in a clean .NET API. Whether you’re building a paperless office portal, a legal e-discovery platform, or a cloud signing service, Doconut gives you everything you need in a single DLL—no Adobe licensing, no third-party binaries, and no command-line hacks.

🚀 What Sets Doconut’s PDF Engine Apart?

Capability Business Value
High-Fidelity Viewer Crystal-clear rendering with selectable text, internal links, and bookmarks.
Annotations & Comments Add highlights, sticky notes, drawings—perfect for reviews and approvals.
PDF/A & PDF/UA Output Generate archival-ready or accessible PDFs with a single flag.

🔧 Developer-Friendly API, Enterprise-Grade Performance

  • Pure .NET (Core / 5 / 6 / 8)—no COM Interop, no platform-specific drivers.
  • Works on Windows, Linux, Docker, and serverless deployments.
  • Thread-safe for multi-tenant SaaS apps.
  • Built-in hardware-accelerated graphics pipeline for lightning-fast page rendering.

Doconut streams large PDFs in chunks, so even 5,000-page engineering manuals render in milliseconds without blowing up your RAM budget.

🌐 End-to-End PDF Workflows—All in One Toolkit

  1. Receive a contract upload via your web app.
  2. Parse & Validate its metadata and digital signatures with Doconut.
  3. Auto-Redact PII (emails, social security numbers) using RegEx masks.
  4. Add Stamps & Comments for internal review.
  5. Flatten & Convert to PDF/A for long-term storage.
  6. Serve the final document instantly in Doconut’s viewer—complete with thumbnails and outlines.

All steps handled by one DLL—no shelling out to Ghostscript, Poppler, or Python scripts.

🏆 Perfect Fit for Multiple Industries

  • Legal Tech – E-discovery, Bates stamping, privilege redaction.
  • Finance & Insurance – Batch stamping and locking policy docs.
  • Healthcare – HIPAA-compliant redaction of patient identifiers.
  • Government & Archives – PDF/A generation for FOIA releases.
  • E-Signature Platforms – Real-time form filling, signature capture, and flattening.

🔒 Security You Can Trust

  • On-prem or private-cloud friendly—zero document leaves your infrastructure.
  • Supports AES-256 encryption and certificate signatures.
  • Optional watermarking to deter leaks.

🧑‍💻 Quick Start for Developers

Download a 60-day trial from Doconut.com, reference the DLL, and you’re minutes away from your first rendered PDF. Full Swagger docs and sample projects for ASP.NET, Blazor, MVC, and WPF accelerate onboarding.

🚀 Take Control of Your PDF Pipeline Today

Stop juggling half-baked open-source libraries or pricey Acrobat automation.
With Doconut’s PDF viewer, you gain:

  • Faster go-to-market times.
  • Lower licensing costs.
  • A future-proof API for every PDF challenge.

👉 Download Doconut and supercharge your .NET applications with industrial-strength PDF capabilities.