What This Tool Does
This tool converts a CAB archive into a 7Z archive. The CAB contents are extracted with a real archive engine and recompressed as 7Z with LZMA, producing a genuine 7Z deliverable.
CAB is common on Windows for installers and updates; this converter is useful when you want the same content in the more widely re-packable 7Z format.
How It Works
Every entry in the CAB is decoded and staged, then a new 7Z is built from the entries using LZMA. The resulting 7Z is reopened to confirm it can be read, and only then is a download link shown.
Step by Step
- 1
Upload the CAB archive.
- 2
Click Convert to 7Z.
- 3
Wait for extraction and repacking.
- 4
Download your 7Z archive.
Compatibility
- Standard CAB archives are supported, including multi-folder ones.
- The 7Z output reads in ordinary archive tools.
- Extraction is lossless, so the 7Z contents equal the CAB contents.
Troubleshooting
- Files that are not CAB are rejected before conversion.
- Corrupt CAB folders produce an explicit failure report.
- No password field exists here, so password-protected 7Z files are not produced.
Frequently Asked Questions
Is the CAB really converted?
Yes, the contents are fully extracted and rebuilt as a real 7Z before download.
Does 7Z compress better than CAB?
Usually yes on text-like content, because 7Z applies LZMA during packing.
Are there limits?
Only the standard platform size and entry-count safeguards.
Can I get the CAB contents as ZIP instead?
Yes, use CAB to ZIP on this site.
Where is conversion performed?
On this server, with temporary files removed after download.