In QuickBooks Desktop, open QuickBooks, go to File > Open or Restore Company, choose Restore a backup copy, then Local backup, and browse to the .QBB file. Pick where you want the restored company file saved, and QuickBooks rebuilds a working .QBW company file from it. This only applies to Desktop; QuickBooks Online doesn't produce a .QBB file for you to restore yourself, since Intuit hosts and maintains your data server-side.
1. Open QuickBooks Desktop and start the restore wizard. From the File menu, choose Open or Restore Company. You'll see three options: open a regular company file, restore a backup, or convert from another format. Pick Restore a backup copy, then click Next.
2. Choose Local backup. Unless the file lives in Intuit's own online backup service specifically, you want Local backup copy, then Next again. This covers a .QBB file sitting on your hard drive, a flash drive, or a network location.
3. Browse to the .QBB file and select it. Navigate to wherever the backup is stored, select the file, and click Open. If the file's on a flash drive or another computer's shared folder, this works the same way as long as that drive is accessible from the machine you're restoring on.
4. Choose where the restored company file should save. QuickBooks asks for a destination folder and file name for the rebuilt .QBW file. Don't save it over your current working company file unless you genuinely want to replace it; save it somewhere separate if you're not certain yet.
5. Let QuickBooks rebuild the company file, then open it. This can take a few minutes for a large file. Once it finishes, QuickBooks opens the restored company automatically, and you're looking at the data exactly as it was the moment that backup was made.
6. Moving to a new computer? Copy the .QBB file over first. A backup file restores the same way regardless of which machine you're on, so copy it to the new computer (via a flash drive, cloud storage, or network transfer), install QuickBooks Desktop there, and run the same restore steps.
QuickBooks Desktop stores your company file on your own machine, so a .QBB backup is a real, self-contained file you can carry around and restore wherever you want. That independence is exactly why Desktop needs a restore process at all: if your computer dies and you never backed up, the data is genuinely gone.
QuickBooks Online inverts that. Your books live on Intuit's servers, not your laptop, so there's no .QBB file for you to open on a different machine because there's no local file in the first place. If something in QBO gets deleted or changed by mistake, the fix is almost never "restore a backup file"; it's finding the specific transaction and fixing or re-entering it, or in a bad enough case, contacting QuickBooks support about their own server-side history.
That difference catches people off guard most often during a Desktop-to-Online migration or a computer replacement, when someone goes looking for "the backup file" in QBO and discovers the whole concept doesn't map over the way they expected.
For a Desktop setup still in use, a scheduled export runs on a fixed cadence and lands in cloud storage automatically, so a backup never depends on someone pausing their work to go click through the restore-or-backup menu.
Since QBO has no file you can grab yourself, we set up a recurring export of the lists and transactions that matter most into a separate store, so there's something to fall back on beyond Intuit's own systems.
Having a backup file and knowing it restores cleanly are two different things. Tell us how your backups currently get made, and we'll tell you whether that process has ever actually been tested.
Tell us what happened, lost file, bad computer, a migration gone sideways, and we'll tell you how to make sure this specific failure mode can't repeat itself. Backups are one example of a manual safety net that's easy to skip; we build the automated version of whatever else in your business depends on someone remembering to do it by hand.
Let's talk →You can't open a .QBB file's contents directly without QuickBooks Desktop; it's a compressed, proprietary format that only QuickBooks' own restore process can unpack into a usable company file. If you don't have Desktop installed, you'll need to install it (even a trial) before a .QBB file does you any good.
A .QBB backup is a full copy meant for disaster recovery, built to be restored back into a complete working company file. A portable company file (.QBM) is a smaller, compressed copy meant for moving a file between computers or emailing it, and it opens with its own Open or Restore Company > Restore a portable file option rather than the backup path.
Restoring into the same or a newer version of Desktop generally works; QuickBooks will prompt you to update the file format if needed. Restoring into an older version than the one that made the backup usually doesn't work, since newer versions store additional data older versions don't recognize.
By default, Desktop saves backups in the same folder as your company file unless you chose a different location when you set up the backup. If you can't find one, check whichever external drive, network folder, or cloud-sync folder you selected the last time a backup ran.