Free Online PRC Viewer (No Signup)
Also opens DWG, DXF, STEP, IGES, IFC, SKP, STL, OBJ, GLB, FBX, 3DM and other 3D/CAD files. Drop any file on the viewer.
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Open the AI GeneratorWhat Is a PRC File?
PRC (Product Representation Compact) is the format Adobe uses to store CAD models in PDF documents, standardised as ISO 14739-1. A PRC file holds a product structure (assemblies, parts and their placements), the geometry of each part as exact B-rep surfaces, as triangle meshes or both, and the colours, materials and names that go with them. Acrobat 3D, Tetra4D, PDF3D and the “Publish to 3D PDF” commands of SOLIDWORKS, CATIA, NX and Creo write it, and so do TeX tools such as Asymptote with movie15 or media9.
This viewer reads the file in your browser, with no Acrobat. It follows the assembly tree and places each part, reads triangle meshes, fans and strips with their normals, draws wire edges as lines, and rebuilds the highly compressed meshes Acrobat writes triangle by triangle, with the exact arithmetic the standard prescribes. Colours come from the file’s styles and materials, sizes from its unit (millimetres when none is stated), and the model is turned upright from Z up.
A 3D PDF that is mostly model opens as that model, with the pages of the PDF one click away in the sheet picker; a document that holds only a small 3D view among its pages stays a document. The model exports to GLB, OBJ, STL and the other formats in the Export menu. 3D PDFs that carry U3D open in the U3D viewer.
Who Uses PRC Files?
Engineers and buyers who receive a 3D PDF of a part or an assembly, manufacturers and suppliers who publish their product models as 3D PDFs, technical writers with interactive manuals, and anyone with a .prc file saved from a PDF or a TeX document and no Acrobat to hand.
Common Use Cases
- Look at the model in a 3D PDF without Acrobat, on a computer or a phone
- Get the meshes of a 3D PDF out as GLB, OBJ or STL
- Go through the parts of an assembly in the object tree and hide the ones in the way
- Open a .prc file written by Asymptote or another TeX tool
- Measure a part from a supplier’s 3D PDF
Features
PRC Files and 3D PDFs
A bare .prc opens, and so does the PRC model inside a 3D PDF, with the PDF pages one click away in the sheet picker.
The Whole Assembly
Assemblies, parts and their placements are followed, so every part sits where the product structure puts it, under its own name.
Compressed Meshes Rebuilt
The highly compressed meshes Acrobat writes are rebuilt triangle by triangle with the arithmetic ISO 14739-1 prescribes.
Meshes, Fans, Strips and Wires
Plain triangle meshes, fans and strips keep their normals, and wire edges are drawn as lines.
Colours and Units
Colours come from the file’s styles and materials, sizes from its unit, and Z-up models are turned upright.
Convert to GLB, OBJ or STL
Save the model as GLB, OBJ, STL, FBX, glTF, DAE, USDZ or 3MF, or the view as PDF, PNG or JPG.
Nothing Is Uploaded
The file is read and drawn entirely in your browser. No account, no upload, no copy of your model on a server.
Share and Embed
Send a link that opens the model in any browser, or drop the viewer into your own page with one iframe.
Compatibility & Format Notes
Read: bare .prc files and the PRC stream of a 3D PDF; the product structure (assemblies with their placements, part definitions, representation items and names); triangle, fan and strip tessellations with their normals; wire tessellations as lines; compressed tessellations (TESS_3D_Compressed), rebuilt exactly; and colours from styles and materials.
How it is drawn: the model is turned from Z up to Y up. Sizes are in the file’s unit, or in millimetres when the file states none. Each part keeps its place in the object tree.
Not read: exact B-rep geometry (NURBS and other surfaces) is not evaluated, so a file that holds only exact geometry and no mesh shows nothing. A part whose compressed mesh cannot be rebuilt faithfully is left out, and a note in the viewer says how many. Textures are not applied.
Embed on Your Website
Add this viewer to your own site with a single line of HTML. Click Embed in the toolbar to generate an embed code, or use the snippet below with your own file URL.
Your Files Stay on Your Computer
Your PRC files are parsed entirely in your browser. Nothing is uploaded, stored, or shared unless you explicitly click the Share button. Shared files are hosted for 90 days then deleted.
Frequently Asked Questions
▶How do I open a 3D PDF without Acrobat?
Drop the PDF on the viewer on this page. If its 3D content is PRC, the model opens in 3D that you can orbit, with the object tree, in any browser and on a phone. The pages of the PDF are one click away in the sheet picker. Nothing is uploaded.
▶Why does my model show nothing?
The file holds only exact geometry (B-rep surfaces such as NURBS) and no mesh. The viewer draws the meshes PRC stores and does not evaluate exact surfaces. Publish the 3D PDF again with a tessellated (mesh) representation, an option most exporters offer.
▶Some parts are missing. Why?
A part whose compressed mesh cannot be rebuilt faithfully is left out so that it does not draw distorted, and a note in the viewer says how many parts were left out.
▶Can I get the model out of a 3D PDF?
Yes. Open the PDF, then use Export to save it as GLB, OBJ, STL, FBX or another format. The parts keep their colours and their place in the assembly.
▶Is this PRC viewer really free?
Yes, completely free. No signup, no watermarks, no file size limits on the viewer (the optional share-link feature has a 100 MB upload cap). Built by Innerscene as a tool for architects, engineers, and designers.
▶Are my files uploaded to a server?
No. All parsing, rendering, and conversion runs in your browser: nothing is uploaded, stored, or transmitted by default. The Share button is the only feature that uploads a file, and only when you explicitly click it.
▶Can I convert to another format?
Yes. Click Export in the toolbar to save as STL (3D printing), OBJ (Wavefront), GLB (glTF binary), or PDF (snapshot of the current view).
▶Can I embed this viewer on my own site?
Yes. Click Embed in the toolbar to generate a one-line <iframe> snippet you can paste into any HTML page. You can choose whether the embed shows the viewer’s toolbar.
Acrobat is a trademark of Adobe Inc. Innerscene is not affiliated with Adobe.