Need to convert DWG (AutoCAD) hatch patterns to PAT files quickly? Use our DWG → PAT converter online to extract and save hatch patterns as .pat files in seconds.
Try it now — upload your DWG and get a PAT file ready for use.
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Converting DWG files to PAT files is a common hurdle for CAD users who need custom hatch patterns. While AutoCAD doesn't offer a "Save As PAT" button, several online tools and workarounds can bridge the gap. Top Online DWG to PAT Converters
Most "online converters" are actually general file conversion platforms. For specialized CAD patterns, these are the most reliable options:
CloudConvert: Handles DWG to various vector formats; best for extracting line work before manual PAT creation. dwg to pat file converter online
Aspose CAD Conversion: A robust browser-based engine that supports legacy DWG versions.
Convertio: Good for quick batches, though it may struggle with complex nested blocks. Why Direct Conversion is Tricky
A DWG is a complex drawing file, while a PAT file is a simple text-based set of coordinates and dash patterns.
Scale Issues: Patterns often look like a solid color if the scale isn't set correctly during conversion.
Line Types: Only basic lines translate well; circles and arcs must be broken into segments (tessellated). Need to convert DWG (AutoCAD) hatch patterns to
Origin Points: PAT files rely on a 0,0 coordinate; if your DWG geometry is far from the origin, the hatch will fail. The "Expert" Workflow (No Tool Needed)
If online converters produce messy results, many pros use the Express Tools already inside AutoCAD: Draw your pattern in a 1x1 unit square. Type SUPERHATCH in the command line. Select your object or block. Follow the prompts to define the boundary.
💡 Pro Tip: Use the free MakePat lisp routine if you frequently create custom hatches; it’s faster and more accurate than any online converter. If you'd like, I can help you: Find a specific LISP routine for pattern making. Troubleshoot broken hatch patterns that won't load.
Step-by-step instructions for editing a PAT file in Notepad.
Go to your chosen online tool (e.g., Hatchery). Click "Upload DWG" and select your prepared file. Try it now — upload your DWG and
A dedicated online converter that focuses solely on DWG to PAT.
Click "Convert." The server will analyze the vectors inside your bounding box. It will then generate a .pat text file. Download this file.
A DWG (Drawing) file is a proprietary binary file format used for storing two and three-dimensional design data. Created by Autodesk, it is the industry standard for architectural drawings, engineering schematics, and product designs. DWG files store vector image data and metadata.
Key features of DWG:
Do not upload a raw floor plan. The converter needs a single, closed, repeating unit.
Not all converters are created equal. Here are the three most reliable tools available today.