Download Sample DWG Files (AutoCAD Drawing)
Download free sample DWG files. This is the native binary format for AutoCAD. Use these files to test version compatibility (2010 vs 2018), 2D vs 3D rendering, and external reference (XREF) handling. STANDARD Versions & Dimensions File Name Specs Size Action floor_plan_2010.dwg Legacy (AC1024) Saved in AutoCAD 2010 format. Essential for testing backward compatibility with…
Download free sample DWG files. This is the native binary format for AutoCAD. Use these files to test version compatibility (2010 vs 2018), 2D vs 3D rendering, and external reference (XREF) handling.
STANDARD
Versions & Dimensions
| File Name | Specs | Size | Action |
|---|---|---|---|
| floor_plan_2010.dwg Legacy (AC1024) |
Saved in AutoCAD 2010 format. Essential for testing backward compatibility with older viewers. | 150 KB | Download |
| architecture_2018.dwg Modern (AC1032) |
Saved in AutoCAD 2018 format. Uses newer object types that crash older software. | 250 KB | Download |
| mechanical_part_3d.dwg 3D Solids |
Contains 3D geometry (not just 2D lines). Tests if your viewer supports Z-axis rendering and rotation. | 500 KB | Download |
QA / LAYOUTS
XREFs & Paper Space
| Test Case | Description | Size | Action |
|---|---|---|---|
| Missing XREF | Broken Link. This file references an external image that is missing. Tests error handling (should display text path instead of image). | 50 KB | Download |
| Paper Space (Layouts) | Contains multiple print layouts (“Sheets”) with Viewports. Viewers often incorrectly show only the Model Space. | 200 KB | Download |
| Heavy Hatching | Performance Test. Contains complex hatch patterns (textures). Use to stress-test the rendering engine speed. | 2 MB | Download |
Technical Specs: DWG
- Internal Versions: You can check the version by opening a DWG in a text editor (Notepad). The first 6 characters indicate the version:
AC1032= AutoCAD 2018/2019/2020/2021AC1027= AutoCAD 2013/2014/2015/2016/2017AC1024= AutoCAD 2010/2011/2012
- Binary Format: DWG is proprietary. Most 3rd party parsers use the “Teigha” libraries (Open Design Alliance) to read it.
- MIME Type:
image/vnd.dwgorapplication/acad.
Frequently Asked Questions
Why does my viewer show a blank page?
The drawing might be “Zoomed Out” too far, or the viewer is displaying “Paper Space” (which is empty) instead of “Model Space”. Try “Zoom Extents”.
The drawing might be “Zoomed Out” too far, or the viewer is displaying “Paper Space” (which is empty) instead of “Model Space”. Try “Zoom Extents”.
What is the difference between DWG and DXF?
DWG is binary (smaller, faster, proprietary). DXF is text-based (larger, slower, open-source). DXF is safer for long-term archiving.
DWG is binary (smaller, faster, proprietary). DXF is text-based (larger, slower, open-source). DXF is safer for long-term archiving.
How to view and convert DWG files?
You don’t need to pay thousands for AutoCAD just to view a file.
- Autodesk DWG TrueView: The official free viewer. It includes “DWG Convert” to downgrade newer files (e.g. 2018 -> 2010) so you can open them in older software.
- LibreCAD: Can open some simple DWG files, but prefers DXF.
- ODA File Converter: The best tool to batch convert DWG to DXF if you want to parse the geometry with Python.
Developer’s Corner: Version Check
Reading DWG geometry in Python is extremely hard. However, checking the version metadata is very easy.
# Python: Check AutoCAD Version
with open(“drawing.dwg”, “rb”) as f:
header = f.read(6).decode(“utf-8”)
versions = {
“AC1032”: “2018”,
“AC1027”: “2013”,
“AC1024”: “2010”
}
print(f“AutoCAD Version: {versions.get(header, ‘Unknown’)}”)
with open(“drawing.dwg”, “rb”) as f:
header = f.read(6).decode(“utf-8”)
versions = {
“AC1032”: “2018”,
“AC1027”: “2013”,
“AC1024”: “2010”
}
print(f“AutoCAD Version: {versions.get(header, ‘Unknown’)}”)