Open BKF files in your browser
A .bkf is a backup Windows XP and Server 2003 made with NTBackup. Open it like a folder right here and take out the files you need. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your archive opens like a folder, its files listed on the left.
- Listed like a folder • Unpacks only what you pick
- Locked archives • Hidden file names included
- Search • Find any file by its name
- Export • Save as ZIP or Extract all
About BKF
NTBackup, the backup tool in Windows NT to Windows Server 2003, wrote its backups in Microsoft Tape Format, the layout it wrote to tape drives, as one .bkf file. Windows Vista dropped NTBackup, so the backups it made stopped opening on the Windows that came after.
Filepeek reads the format itself: each backup set in it, each drive under it, and every folder and file with its date, listed like a folder. Pick a file to open it in its own viewer, or save them all with Save as ZIP or Extract all.
Compressed or encrypted backups, which NTBackup made only for some tape drives, list their files without their contents, and a damaged block is passed over to the next one that reads. A SQL Server backup in the same format opens on its About card.
Windows NTBackup backup
.bkf
Format
- MIME type
- application/octet-stream
- Made by
- Windows NTBackup
Inside the file
- Holds
- Drives, folders and files
- Format
- Microsoft Tape Format
- From
- Windows NT to Server 2003
- Made by
- Windows NTBackup
Opens in every browser
Filepeek opens .bkf files in Chrome, Edge, Firefox and Safari, on computers and phones. On their own, browsers only download them.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Apps that open BKF
- WindowsNo app opens it on Windows 10 or 11
- MacNo app opens it
- iPhone and iPadNo app opens it
- AndroidNo app opens it
Questions
How do I open a .bkf file on Windows 10 or 11?
Drop it here and it opens as a folder. Windows 10 and 11 have no NTBackup, and Microsoft’s Windows NT Backup Restore Utility only ran on Vista and Windows 7.
Can I get just one file out?
Yes. Find it in the list and pick it. It opens in its own viewer, with Export to save it.
Why are some files empty?
A file NTBackup compressed or encrypted, which it did only for some tape drives, is listed without its contents.
Is my .bkf damaged?
Filepeek passes over a block that doesn’t add up and goes on to the next one, so a damaged backup still lists every file it can read.
Is it safe to open a .bkf here?
Yes. Its files are only read, nothing in them runs, and the backup never leaves your device.