Click the "Select File" button above, and choose your DC3 file.
You'll see a preview.
Click the "Convert file to..." button to save your file in the format you want.
Convert DC3 to another file type
The converter easily converts your DC3 file to various formats - free and online. No AutoCAD or extra software needed.
Convert a file to DC3
The converter also works in reverse, so you can convert other Raster Image formats to DC3 with high quality output.
About DC3 files
The .DC3 extension is a "container of mystery" because it serves three distinct, incompatible masters, making it frustratingly opaque for standard users.
Medical Imaging (DICOM): Most frequently in a conversion context, .DC3 files are individual slices from a CT, MRI, or Ultrasound scan, adhering to the DICOM standard. Unlike standard JPG or PNG files, these contain high-bit-depth raw pixel data and sensitive patient metadata (PHI). Standard operating system tools like Windows Photos or macOS Preview cannot render them, often leading to panic that the file is corrupt.
DesignCAD 3D Drawings: In engineering and architectural archives, .DC3 represents legacy 3D ASCII drawings created by IMSI/Design's DesignCAD software. These are vector-based files that modern CAD giants like AutoCAD often refuse to import directly without intermediate conversion steps.
Proprietary Data (Games & Tax): Statistically, your file might also be a save file from the Decisive Campaigns wargame series or a Russian tax declaration. These are proprietary binary blobs; they are not convertable to images or text and must be opened strictly within their parent applications.
Best Conversion Targets:
For Viewing/Web: Convert DICOM .DC3 files to JPG or WEBP. This makes the image viewable on any device but strips the ability to adjust window leveling (brightness/contrast) dynamically.
For Documentation: Convert to PDF to preserve a standardized layout for medical reports or tax records.
For Editing: Legacy DesignCAD files should be converted to DXF or STL to be usable in modern 3D modeling environments like Blender or SolidWorks.
Use Convert.Guru to open and convert your DC3 file.
If you want to convert DC3 file to DWG, DXF, DGN, RVT, RFA, SKP, 3DM, STEP, IGES, SAT, X_T or X_B, you can use MicroDicom or similar software from the "Medical Imaging & Game Storage" category. In the File menu, look for Save As… or Export….
To convert SLDASM, DGN, PRT, IAM, X_B, CATPRODUCT, SLDPRT, RVT, ASM, DWG, CATPART or DXF files to DC3, try MicroDicom or another comparable tool in the "Medical Imaging & Game Storage" category.
The DC3 Converter Story
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 DC3 converter.