From AutoCAD to the viewer: what you can present with DXF

DRB Studio opens text-based DXF files to display supported AutoCAD geometry. A flat drawing opens as a 2D sheet; supported three-dimensional geometry can be shown in 3D. Saving a floor plan as DXF does not automatically build a house. Start by identifying what your drawing contains and what the client needs to see.

The viewer interface is in Spanish. Spanish control names are followed by their English meaning in this guide.

Editorial review: October 20, 2026 · DRB Studio.

1. Establish whether you have a 2D floor plan or a 3D model

   Open the original DWG in AutoCAD and inspect its content before exporting. A floor plan made of lines describes a layout, but may contain no modeled heights, roofs or openings. An isometric view helps reveal whether there is actual volume or simply linework on a plane.

   Define the meeting’s scope. A drawing may be enough to discuss a door’s position. To explain the height of a room, you need geometry that represents it. Avoid promising an interior walkthrough from information that has not been modeled.

   Keep the working DWG and create an exchange copy. Identify the revision and note what must appear: the site boundary, walls, entrance or relevant furniture. Save a reference of the original view so you can check the export rather than trusting a first impression.

2. Save a text-based DXF and check its content

   Autodesk documents both ASCII and binary DXF, with options to export a drawing or a selection. DRB requires ASCII, meaning text; its reader does not support binary DXF. See Autodesk’s AutoCAD LT 2026 DXF exchange documentation (source review: October 20, 2026). Choose DXF in your edition’s save or export dialog and review the options before confirming.

   Use a new filename to preserve the original. Reopen the export in AutoCAD and check the included elements. This separates export problems from differences introduced by the browser reader. Record the selected DXF version rather than assuming every variant will behave the same.

   For files from specialist products, inspect their custom objects too. Seeing an object in its authoring software does not mean it has been converted into an entity another reader can draw. Start with a small selection when in doubt.

3. Confirm units using a known dimension

   AutoCAD’s INSUNITS variable declares units for insertion behavior, with values including millimeters, centimeters and meters. See Autodesk’s AutoCAD 2026 INSUNITS reference (source review: October 20, 2026). DRB’s DXF reader uses recognized declared units; when they are absent, it may infer a scale. Verify that inference.

   Choose a real project dimension and compare the geometry, not just the number in a dimension label. Text can state one measurement while the lines have another. If they differ, correct the source drawing before using it to discuss dimensions.

   Do not change the unit declaration merely to make the result fit the screen. First determine how the file was drawn. Use the same geometric reference when comparing versions. The exchange should retain the project’s actual size even when automatic framing makes different scales look similar.

4. Know which entities the viewer can draw

   The current reader interprets lines, polylines, circles, arcs, 3D faces and certain blocks. It organizes geometry by layer and prepares text for the flat view. This supports many working drawings, but does not reproduce every AutoCAD feature or style.

   ACIS solids and hatches are not displayed by this reader, and some MESH entities are omitted. Certain curves are approximated. Read the warnings and compare important areas visually. A facade without fills may still show its outline, while a solid-based component may have no useful representation.

   If a critical element is missing, check its type in the source file. Prepare a copy with compatible geometry or present that area in an exported drawing. There is no need to explode the entire DWG without a diagnosis. Keep the original and check every conversion before replacing the delivery copy.

5. Use the 2D sheet to explain a flat drawing

   Drag the DXF into the viewer or select it through the file picker. If recognized as flat, it opens in the 2D sheet. Check outlines and text carefully. The sheet shows layer information and warns about some omitted elements; use these to compare it with your reference.

   “Ver en 3D” (View in 3D) changes how you look at the available geometry. It does not extrude a floor plan or infer rooms automatically. Lines at a single height remain a flat drawing. To explain an inhabitable space, prepare its model in the source software.

   Organize the discussion by area: locate the entrance, follow a circulation route, then reach the question being reviewed. If DXF text or symbols are not sufficiently legible, include a reference PDF from AutoCAD. Identify the same revision in both files.

6. Rehearse the 3D view and prepare the file for your client

   When a DXF includes compatible faces or volume, check that roofs, supports and surfaces needed to understand it are present. An elevated line is not a finished wall. Compare the form with the source before using shadows or interior views to support a design decision.

   In the standard 3D view, left-drag orbits, right-drag pans, scrolling zooms toward the cursor as in SketchUp, and middle-mouse dragging looks around from your current position. These controls apply to model navigation; the sheet has its own flat-view interaction. Rehearse the mode you will actually use.

   Test the copy on the final device and keep the DWG outside browser storage. Project cloud storage is currently disabled; an account does not turn your file into a private link. If you deliver a 3D project as a .drb package, check opening it using the project-sharing guide. This guide is based on the reader’s capabilities and Autodesk documentation. Your drawing type has not been validated through an AutoCAD export for this guide; test your own file before presenting it.