Why convert BAK to CSV?
BAK is a naming convention, not a format - the bytes inside could be a database, a CAD drawing, a settings file, or anything else. .csv is plain-text tabular data with columns separated by commas. No converter can read a generic .bak and produce CSV because there is no shared structure to target.
How to convert BAK to CSV
Excel or LibreOffice Calc (after recovery) FREE
Rename the .bak to its original extension (e.g. .xls, .xlsx), open it in Excel or LibreOffice Calc, then use File > Save As to export as .csv.
SQL Server Management Studio (after restore) FREE
If the .bak is a SQL Server backup, restore the database in SSMS, then export any table to .csv using the export wizard or a SELECT query.
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 →
.CSV
Comma-Separated Values
A CSV file stores tabular data as plain text - one row per line, values separated by commas (or semicolons in European locales). Any spreadsheet opens it: Excel, Google Sheets, LibreOffice…
Open .CSV details →Quality & what to watch
- There is no generic BAK-to-CSV converter; every tool described as one is handling a specific underlying format.
- The only viable path produces CSV only if the original file held tabular data - a CAD drawing or settings file will not.
- SQL Server
.bakfiles use Microsoft Tape Format and must be restored into SQL Server before any data can be exported.
Frequently asked questions
Is there any tool that converts `.bak` directly to `.csv`?
How do I know what program created my `.bak` file?
.bak next to a .dwg is an AutoCAD backup. Opening the file in a hex editor shows the real format from its first bytes.
