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How to open .BK2 files on iOS

To open .BK2 files on iOS, iOS typically cannot preview .BK2 in Files/Quick Look; if it won’t open, transfer it to a desktop (preferably Windows) and use RAD Video Tools (Bink).

Step-by-step instructions

  1. iOS typically cannot preview .BK2 in Files/Quick Look; if it won’t open, transfer it to a desktop (preferably Windows) and use RAD Video Tools (Bink).

Alternative methods

  • Open .BK2 in a browser-based viewer if desktop apps fail.
  • Try opening .BK2 on iOS with a secondary app to rule out app-specific issues.
  • Convert .BK2 only with trusted tools when direct opening is not possible.

Common issues

The .BK2 file won’t play in my media player

Many standard players do not include a Bink (Bink 2) decoder, so the file may appear unsupported even though it is valid.

  1. Try opening it with RAD Video Tools (Bink), which is commonly listed as supporting .BK2.
  2. If you are not on Windows, transfer the file to a Windows PC for the best chance of playback with RAD’s tools.

The file is from a game and seems corrupted or incomplete

.BK2 files are often distributed inside game installs; copies taken from incomplete downloads or modified installs may not open correctly.

  1. Re-copy the .BK2 from the original game installation directory (or re-verify/reinstall the game) and try again.
  2. Check the file size against the original source; a much smaller file often indicates an incomplete copy.

Renaming .BK2 to .MP4 (or another extension) didn’t work

Changing the extension does not convert the video format; the underlying data is still Bink 2.

  1. Keep the .BK2 extension and open it with a Bink-capable tool (e.g., RAD Video Tools).
  2. If you need another format, use an actual conversion workflow that can decode Bink video first (not just renaming).

Security note

.BK2 is a video format, but media parsers can still have vulnerabilities; only open .BK2 files from sources you trust (especially if they are downloaded outside of an original game installation).

Back to .BK2 extension page