Why convert BAK to DWG?
When AutoCAD saves a drawing it renames the existing .dwg to .bak as a safety copy, so the two files are structurally identical. The most common reason to do this is recovery - if the current .dwg is corrupted or accidentally overwritten, the .bak holds the previous clean save.
How to convert BAK to DWG
AutoCAD APP
In AutoCAD go to Application Menu > Drawing Utilities > Recover, select the .bak file, and save the result under a new name; or copy and rename the .bak to .dwg and open it directly.
BricsCAD APP
Copy the .bak file, rename the copy to .dwg, and open it in BricsCAD, which reads DWG natively.
DraftSight APP
Copy the .bak file, rename the copy to .dwg, and open it in DraftSight.
About these formats
.BAK
Backup File (generic)
A BAK file is a backup copy saved by an application before overwriting the original. It has no format of its own; the content inside is whatever the original file was (a CAD drawing, a…
Open .BAK details →
.DWG
AutoCAD Drawing Database
A DWG file is a CAD drawing, the native format of Autodesk AutoCAD, usually an architectural plan or engineering design. To view, measure, or print one for free, use DWG TrueView (Windows),…
Open .DWG details →Quality & what to watch
- This only applies to AutoCAD
.bakfiles - hundreds of other programs also create.bakfiles, and renaming a non-AutoCAD.bakto.dwgwill produce a broken file. - The
.bakholds the state from the save before the last one; any work done after that save is not recoverable from it. - AutoCAD keeps only one
.bakper drawing - each new save overwrites the previous backup.
Frequently asked questions
Do I need a paid AutoCAD license to open a recovered `.dwg`?
The renamed `.dwg` won't open - why?
.bak may not be from AutoCAD; confirm by checking whether an original .dwg with the same base name exists in the same folder.
