Many construction projects sit under a non-disclosure agreement. Defence and government work, healthcare and pharmaceutical fit-outs, data-centre commissions, embassy projects, private residences for high-profile clients. The PDF drawing set is meant to live on the architect's drive and the contractor's drive, not on a third-party server. Most modern PDF editors require cloud sign-in to use, some upload the file to render it on a remote machine, some store annotations server-side. For confidential construction drawings, that is a compliance violation waiting to happen.

Why cloud PDF editors are a problem for confidential projects

When a PDF editor uploads your drawing to render it in a browser, the file leaves your machine and lands on a server in someone else's data centre. Server logs record the file name, the upload timestamp, the user account, and often a content fingerprint. Annotations stored server-side become a second copy of the project living outside the NDA boundary. For a defence or healthcare project, that copy can be a compliance breach even if no human ever reads it. For a private residential project, the client did not consent to a copy of their floor plan sitting on a third-party server. The risk is not theoretical, and the contract language often makes it explicit.

How Ncored handles confidential drawings

Ncored is a desktop application. The PDF drawing stays on your local drive. The application does not upload your file to render it, does not require a cloud account to use, does not sync annotations to a remote server, and does not phone home with your document contents. The trial requires no email, no signup, no account. Annotations are written back into the same local PDF file using standard PDF annotation streams, which any conforming PDF viewer (Adobe Acrobat, Bluebeam Revu, Apple Preview, Foxit PDF Editor) reads and writes. Works fully offline once installed.

Fully local rendering, no upload required
The PDF stays on the local drive. The renderer runs on your machine.
No account required to use
Trial requires no email, no signup, no third-party identity provider.
Offline-capable once installed
Works on an air-gapped jobsite laptop or in a defence office.
Standard PDF annotation streams
Annotations written into the local file, no proprietary cloud sync.
No content telemetry
The application does not transmit document contents off the machine.

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Cloud-free PDF editor comparison

Drawboard Projects is cloud-first by design and stores documents on its server. Bluebeam Studio Sessions provide collaboration features that tend to require cloud access. Adobe Acrobat increasingly nudges users into Document Cloud workflows for sharing and signing. Apple Preview is local by default but lacks the AEC-specific feature set. PDF-XChange Editor on Windows is fully local, but does not have a native Mac client. Ncored is fully local on both Mac and Windows.

Frequently Asked Questions

Does Ncored phone home with my document contents?
No. The renderer is fully local. The application does not transmit document contents off the machine. The only network traffic is the auto-updater check on app launch and license verification on activation, neither of which touches your PDF.
Where are my annotations stored?
Annotations are stored as standard PDF annotation streams written back into the same local PDF file. No separate database, no cloud sync, no proprietary format.
Does the trial require email signup?
No. Just download and start using, 14 days free, no signup or email needed.
Can Ncored run on an air-gapped machine without internet?
Yes, once installed. Initial download requires internet, but the application works fully offline after that. License verification can be configured for offline activation for defence and government use cases on request.
Is there a no-telemetry mode for projects under strict NDA?
The default install does not transmit document contents. The auto-updater check on launch can be disabled in preferences for environments where all network traffic must be approved.