What is the IMD file format?
.imd is the proprietary database file format used by CaseWare IDEA, a data analytics application designed for auditors and accounting professionals. Each .imd file is a self-contained binary database holding a complete audit dataset: table data, schema definition, field metadata, history log, user-added comments, indices, and embedded reports - all within a single file.
A distinctive naming convention ties .imd files to specific accounting modules in CaseWare Working Papers. The filename carries a two-letter database code suffix identifying the source module - for example, GL for General Ledger, AP for Accounts Payable, and BL for Balance Sheet. Files are generated by exporting data from CaseWare Working Papers via its Export to IDEA function, or by importing raw transaction data directly into IDEA.
The format is Windows-only, fully proprietary, and cannot be opened outside CaseWare IDEA. There is no public format specification and no documented magic bytes. Dataset sizes range from a few kilobytes for small trial balances to several gigabytes for full transaction ledgers. IDEA was originally developed by CICA (Canadian Institute of Chartered Accountants) in the early 1990s and later acquired by CaseWare International.
Security & safety
RISK: LOWIMD files contain audit/financial data, not executable code. Risk is data-privacy: they may hold sensitive accounting records. Not a malware vector.
Format details
in a nutshell- IMD (InterMotion Designer) file - Some older CAD/simulation tools used .imd for motion design data; rare.
- MIDIFile variant (rare) - A handful of legacy applications used .imd for instrument or MIDI data; not common.
Programs that open IMD files
Windows1 app
CaseWare IDEA
Paid Open IDEA, use File > Open Database and navigate to the .imd file. Requires a valid IDEA licence. Technical details
deep spec| Encoding | Binary (proprietary format; internal structure not publicly documented) |
| Container | Proprietary CaseWare IDEA self-contained database container |
| Typical file size | Kilobytes to several gigabytes, depending on dataset volume |
| Stored data | Table data, schema definition, field metadata, history log, user comments, indices, and embedded reports |
| Module naming convention | Filename includes a two-letter database code: GL (General Ledger), AP (Accounts Payable), BL (Balance Sheet), FP (Financial Position), PR (Payroll), and others |
| Platform | Windows only; no macOS or Linux version of CaseWare IDEA exists |
| Magic bytes | None publicly documented; proprietary binary format |
| Export source | Generated via the Export to IDEA function in CaseWare Working Papers, or by direct data import into IDEA |
| Encryption | No default encryption; access control is enforced at the application level |
| Interoperability | Cannot be opened outside CaseWare IDEA; no third-party reader or converter is available |
| Format versioning | Tied to IDEA application version; IDEA 10+ uses an updated internal schema |
| Origin | Originally developed by CICA (Canadian Institute of Chartered Accountants); acquired by CaseWare International circa 2005 |
| Released | ~1990s (IDEA first released early 1990s by CICA, acquired by CaseWare) |
| Latest version | IDEA 11.x (current as of 2025) |
| Specification | www.caseware.com |
IMD conversions
Community Q&A
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