What is the BIM file format?
.bim files are catalog item files for Cadsoft Envisioneer, a residential and light-commercial building information modeling application developed by Cadsoft Computer Inc. (acquired by Meti, Canada). Each .bim file represents a self-contained building component - such as a door, window, cabinet, or fixture - that can be inserted directly into an Envisioneer design project.
The file encapsulates 3D geometry, material properties, manufacturer data, and placement metadata for a single architectural element. Cadsoft maintains an online catalog at cadsoft.com/bim_files/ where architects and designers can download manufacturer-supplied .bim objects for their projects.
The format is proprietary to Envisioneer, which remains under active development (version 14+ as of 2024-2026). For open-format interoperability, components can be exported to IFC, the industry-standard open BIM exchange format. Only Cadsoft Envisioneer opens .bim files natively on Windows.
Security & safety
RISK: LOWData file for architectural software; no executable code; low risk.
Format details
in a nutshell- Generic BIM file (Building Information Modeling) - '.bim' is sometimes used loosely to refer to any BIM-format file; no single universal .bim format exists outside Cadsoft's usage.
- BuildSoft BIM - Some structural engineering tools use .bim for structural model exports; unrelated to Cadsoft.
Programs that open BIM files
Windows1 app
Cadsoft Envisioneer
Paid Load a BIM catalog item via the component library or File → Import in Envisioneer. Technical details
deep spec| Format type | Proprietary 3D building component package |
| Encoding | Binary (likely proprietary or ZIP-based packaging) |
| Typical file size | 10 KB - 10 MB |
| Content | 3D geometry, material properties, manufacturer metadata, placement data |
| Component scope | Single architectural element per file (door, window, cabinet, fixture, etc.) |
| Software ecosystem | Cadsoft Envisioneer (residential and light-commercial BIM) |
| Catalog distribution | Manufacturer-supplied objects downloadable at cadsoft.com/bim_files/ |
| Associated OS | Windows |
| Interoperability | Can export to IFC for exchange with other BIM applications |
| Developer | Cadsoft Computer Inc. (acquired by Meti, Canada) |
| MIME type | application/octet-stream |
| Format documentation | No publicly documented magic bytes or format specification |
| Released | circa 2008-2012 (Cadsoft Envisioneer product line) |
| Latest version | unknown; active in Envisioneer 14+ (2024) |
| Specification | www.cadsoft.com |
BIM conversions
Community Q&A
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