CONVERT
CAB → BZ2
Fast, secure CAB to BZ2 conversion. No registration required.
DRAG. DROP. DONE.
Upload any file and our engines will handle format detection automatically.
Max 100 MB · Free plan · No signup required
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Why this pair exists — CAB is Microsoft's Cabinet archive format used in Windows installer packaging. Ergo, the BZ2 route. A CAB becomes a BZ2 by opening the source archive in memory and writing every entry into a new container using the BZ2 codec. No files touch disk in cleartext, which is handy when the CAB is password-protected or contains sensitive folders. One more beat. CAB is Microsoft's Cabinet archive format used in Windows installer packaging. Receiving format: BZ2 is the bzip2 Burrows-Wheeler compression format, slower but tighter than gzip.
Windows Cabinet
Source formatCAB (Cabinet) is a Windows archive format used for software installers.
Bzip2 Compressed
Target formatBzip2 provides higher compression ratios than gzip at the cost of slower speed. It is commonly used for .tar.bz2 archives in Linux distributions where smaller download sizes are preferred.
Why convert CAB to BZ2
BZ2 is supported by more systems out of the box than CAB. Windows reads BZ2 without extra software; macOS and most Linux distros ship decoders too. Converting upstream saves every downstream user from installing a utility just to read your bundle.
HOW TO CONVERT
CAB → BZ2
Upload the CAB
Send the archive file to KaijuConverter. Entries are never written to disk in cleartext.
Repack through 7-Zip
Our pipeline opens the CAB in streaming mode, walks every entry and writes it into a fresh BZ2 container.
Download the BZ2
The new archive is ready in seconds. Both files auto-delete within two hours.
Common Use Cases
Cross-platform distribution
Send a BZ2 to mixed-OS teams when only Windows users can open your CAB reliably.
Backup migration
Move historical backups from legacy CAB into BZ2 as your archival standard evolves.
Upload-cap-friendly packaging
Cloud portals with a 50/100 MB upload cap accept a BZ2 that the larger CAB would not fit in.
Game and mod repacking
Mod distribution platforms typically require BZ2; repack your CAB build once before upload.
Quality & Compatibility
Archive conversion is strictly lossless. Byte-for-byte the files inside the BZ2 are the same as those that were inside the CAB; hashes of individual entries match pre- and post-conversion. Only the container wrapper changes.
Tips for Best Results
- For maximum compression, pick the slowest level in Advanced — the decoder speed of BZ2 is unaffected by how hard we crunch on our side.
- Keep a CAB backup until you have verified the BZ2 opens correctly in the destination tool; archives occasionally expose codec bugs at the edge.
- Do not convert already-compressed payloads (video, music, images) expecting smaller output — archive converters cannot compress what is already at the entropy limit.
Frequently Asked Questions
Frequently Asked Questions
Yes. The free tier accepts files up to 100 MB without registration, email capture or watermarks. Paid plans raise the size cap, enable batch conversions and provide a REST API for automation, but nothing on the free tier is quality-limited — the output is exactly the same as on any paid plan.
Yes — because CAB and BZ2 use different compression codecs, every entry is decompressed from the CAB and re-compressed for the BZ2. The uncompressed data is identical on both sides, and the re-compression happens entirely inside our processing container.
Uploads run over HTTPS, files are processed in isolated containers, and both the source CAB and the BZ2 output are auto-deleted within two hours. No account is required, file contents are never logged, and KaijuConverter does not use uploads for AI training. The paid plan adds a signable data-processing agreement for regulated workflows.
Usually yes, modestly, when the original CAB used an older codec like Deflate. Against modern LZMA2 / Zstd BZ2 containers expect 10-30% savings on mixed content and almost no change on pre-compressed payloads. Advanced → compression level lets you trade speed for ratio.
Most files finish in well under a minute. Small images and documents are typically ready in a few seconds; large video or audio files scale roughly with duration. Upload speed from your network is usually the dominant factor, not server time.
Yes. Provide the password during upload; we use it only to decrypt inside the processing container and never log or persist it. The resulting BZ2 can be re-encrypted with a password of your choice (AES where the target format supports it).
Secure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 2 hours. We never read, share, or store your data.