BackToCAD Technologies, LLC

The PRC (3D PDF) File Format


"The PRC file format (ISO 14739-1) is an accurate, highly compressible 3D data format optimized to store, load, and display various 3D data, metadata, assembly structure, graphics information and Product Manufacturing Information (PMI).  The PRC file format can be viewed within the free Adobe Reader when encapsulated with the Portable Document Format (PDF).  It can be stored within PDF as either accurate B-Rep geometry or tessellated data (Net). Because of this, it can be extracted from a PDF for use years later in CAD, CAM, CAE systems.


Adobe released control of the PRC data format to ISO and published the specification. In 2009, AIIM ( established a working group to continue developing the PRC format. Working group participants include Boeing, Adobe, Bentley Systems, General Dynamics, TechSoft 3D, ITI Transcendata, and several other companies committed to open standards. PRC continues to be rapidly embraced by the standards community and the aerospace industry as a robust, neutral file format for 3D engineering data exchange and long-term data archival and retrieval.


As part of the PDF-2 open standard (ISO 32000-2:2017), the PRC file format provides users the assurance that 3D models, manufacturing instructions, and technical documents will be available years later for design reuse and in revisions to technical documents as part of the overall product lifecycle.


Adobe, for its part, is committed to continued support and advancement of the abilities of the free Adobe Reader to display and interact with PRC data. Adobe’s ongoing commitment ensures that engineering data can be shared with anyone, anywhere, both now and in the future.


Citation From 3DPDF Consortium,

3D PDF (PRC) Viewing with Acrobat

Acrobat 3D PDF Viewer

3D PDF Model as PRC

2D PDF Elements

BacktoCAD Technologies, LLC

601 Cleveland St, Suite 380

Clearwater, FL 33755, USA


Phone: (727) 303 0383

© Copyright 2019 BackToCAD Technologies, LLC. All rights reserved. Kazmierczak® is a  registered trademark of Kazmierczak Software GmbH. Print2CAD,, CAD Direct,, CAD Bot, New Era CAD, and CAD2Print are Trademarks of BackToCAD Technologies LLC. CADconv is a Trademark of BackToCAD Technolgies. DWG is the name of Autodesk’s proprietary file format and technology used in AutoCAD® software and related products. Autodesk, the Autodesk logo, Revit, AutoCAD, DWG are registered trademarks or trademarks of Autodesk, Inc., and/or its subsidiaries and/or affiliates in the USA and/or other countries. All other brand names, product names, or trademarks belong to their respective holders. This website is independent of Autodesk, Inc., and is not authorized by, endorsed by, sponsored by, affiliated with, or otherwise approved by Autodesk, Inc. The material and software have been placed on this Internet site under the authority of the copyright owner for the sole purpose of viewing of the materials by users of this site. Users, press or journalists are not authorized to reproduce any of the materials in any form or by any means, electronic or mechanical, including data storage and retrieval systems, recording, printing or photocopying. Parts of AI character are based on ALICE AI Foundation Project under the terms of the GNU General Public License.

Unfortunately all free trial version and free converison services are no more available for European Union (EU). If you are in EU do not download any free versions or use our free conversion services. Download the restricted Demo Programs instead.