System & temporary files · .bak
What Is a BAK File?
A .bak file is a backup copy of a file made by a program.
- Extension
- .bak
- Full name
- Backup file
- Type
- System file
Free BAK Tools
These run in your browser. Your BAK files are never uploaded.
About BAK Files
BAK files are backup copies that programs make before saving changes, such as AutoCAD drawings, SQL Server database backups or text editor copies. The format inside is whatever the original file was. To use one, figure out which program made it and rename it to the original extension, or restore it with that program.
How to Open a BAK File
- Any device
- Check its type with the File Info tool, then rename it to the original extension.
- SQL Server
- Restore it with SQL Server Management Studio.
BAK File Questions
How do I open an AutoCAD BAK file?
Rename it from .bak to .dwg and open it in AutoCAD.
Can I delete BAK files?
Yes, if you don't need the backup. Keep them until you're sure the main file is fine.