asdftools.
Free online tool

DWG viewer (2D preview)

Open a DWG drawing in your browser, zoom and pan, and switch layers on or off. Free 2D preview without uploading your file.

Browser-basedFree

Your workspace

On-device processing
Limits & notes · 20 MiB / 60 s

One DWG, up to 20 MiB; 60 seconds; 50,000 drawn objects, 1,000,000 points and 512 layers. R14–2018 format signatures are accepted, but compatibility varies. 2D model space only: no 3D solids, layouts, external references, hatches or custom fonts. Text, dimensions and line styles may differ or be missing. No editing, DWG saving or precision measurement. Files stay in browser memory; nothing is uploaded. Requires WebAssembly and substantial free memory; large drawings may fail on mobile.

Drag to pan; use the wheel or zoom buttons to zoom. Keyboard: arrow keys to pan, +/− to zoom, Home to fit. Curves and text are approximate. No measurement or file export is provided.

Layers

Drag to pan; use the wheel or zoom buttons to zoom. Keyboard: arrow keys to pan, +/− to zoom, Home to fit. Curves and text are approximate. No measurement or file export is provided.

Open-source engine and viewer: license and corresponding source code. GNU GPL / LibreDWG · Source ZIP · LibreDWG source

Your files and text are processed in this browser. They are not uploaded to our server. Closing or refreshing the page clears your work.

Quick start

  1. Select one .dwg file. The drawing opens automatically on your device.
  2. Use zoom, drag to pan, and layer checkboxes to inspect the drawing.
  3. Read any compatibility warning. Clear the drawing when finished and keep the original.

Before you start

One DWG, up to 20 MiB; 60 seconds; 50,000 drawn objects, 1,000,000 points and 512 layers. R14–2018 format signatures are accepted, but compatibility varies. 2D model space only: no 3D solids, layouts, external references, hatches or custom fonts. Text, dimensions and line styles may differ or be missing. No editing, DWG saving or precision measurement. Files stay in browser memory; nothing is uploaded. Requires WebAssembly and substantial free memory; large drawings may fail on mobile.

A closer look

Inspect supported model-space geometry in a DWG without installing CAD software. This read-only preview draws lines, arcs, circles, polylines, basic text and supported blocks. It is not a CAD editor or a reliable construction drawing; compare important details with the source application.

A practical example

Choose a floor-plan DWG, zoom into a room, then turn a layer off to inspect the remaining geometry. The original file is unchanged.

Quick answers

Does this tool send my input to a server?

No. Your input is processed in this browser. Download the result before closing the page; your workspace is not saved to an account.

What should I check before using the result?

Keep the original. Check the output’s content, layout, quality and format before sharing it or using it for important work. Review the limitations above for details.

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