Extract text from EAGLE design rule files (DRU)
To convert DRU design rules to another format, you need Autodesk Fusion or other Cad software.
To convert other file formats to the "PCB Design Rules" file type, you need software like Autodesk Fusion or a similar tool.
A .DRU file is a Design Rules file used primarily by Autodesk EAGLE (now integrated into Autodesk Fusion) for Printed Circuit Board (PCB) design. These files act as the gatekeepers of your engineering constraints, storing critical parameters such as minimum trace widths, clearance distances between copper features, and drill sizes.
The main issue with .DRU files is their opacity outside the EAGLE ecosystem. While modern versions are text-based, they are formatted specifically for the EAGLE Design Rule Check (DRC) engine, making them difficult to interpret for fabrication houses or collaborators who do not possess a paid subscription to Autodesk Fusion. Furthermore, moving these rules between different EDA tools (like moving to KiCad) often requires manual reentry because direct conversion is rarely supported natively.
To overcome these barriers, users often convert .DRU files to TXT or XML to inspect the raw parameter values without launching heavy CAD software. For documentation and archiving, converting the rule summary to PDF ensures that your fabrication constraints are human-readable and preserved independently of software version changes.
Convert.Guru analyzes your DRU file, detects the exact format, and lets you read the text inside.
If you want to convert DRU file to , you can use Autodesk Fusion or similar software from the "PCB Design Constraints" category. In the File menu, look for Save As… or Export….
To convert files to DRU, try Autodesk Fusion or another comparable tool in the "PCB Design Constraints" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our DRU converter.