How do I open a .!qb file?

You cannot — it is an unfinished qBittorrent download. Let the torrent complete and the .!qb suffix is removed automatically.

Is it safe to delete a .!qb file?

Yes. It only holds an incomplete download. Remove it from within qBittorrent so the torrent state stays consistent.

Why does my download have a .!qb extension?

qBittorrent adds .!qb to files that are still downloading so you can distinguish them from finished files.

Can I rename a .!qb file to fix it?

No. The file is incomplete; renaming makes a corrupt file. You must finish the download to get a working file.

What Is a .!QB File?

A file ends in .!qb and will not open. It is an unfinished download from qBittorrent — only part of the data has arrived. Here is how to complete or remove it.

What a .!qb file is

A .!qb file is a partial download created by qBittorrent. While a torrent is downloading, qBittorrent appends .!qb to files that are not finished yet, so you can tell complete files from ones still in progress. This behavior is controlled by the app's "Append .!qB extension to incomplete files" option.

Why you have one

The download has not finished, or it was paused or stopped before completing. The .!qb holds however much data arrived so far — usually not enough to open.

How to open a .!qb file

You do not open it directly — you finish the download. Reopen qBittorrent, make sure the torrent is active with seeders available, and let it complete. When it reaches 100%, qBittorrent removes the .!qb suffix automatically and the file becomes usable. Do not manually rename a .!qb to remove the suffix: the file is incomplete and will be corrupt or unplayable.

Is it safe to delete?

Yes. Deleting a .!qb only discards an unfinished download. If you still want the file, remove the torrent and its data in qBittorrent and re-add it, rather than deleting the .!qb on disk while the torrent is loaded.

How to handle a .!qb file by OS

Windows: incomplete downloads sit in your qBittorrent save or temp folder; manage them from inside the app, not File Explorer. macOS/Linux: same — let qBittorrent finish or remove the torrent so leftover .!qb data is cleaned up properly.

Common problems

If a torrent is stuck and the .!qb never completes, there are likely no seeders. Renaming will not help — you need an active source to finish the remaining pieces.