Supported formats
StarkZip is a universal archive viewer and creator for Windows. The .starkzip extension is our own format — viewable only in StarkZip — with strong encryption built in.
| Format | Extension | Open | Create | Password |
|---|---|---|---|---|
| StarkZip archive | .starkzip | Yes | Yes | AES-256-GCM |
| ZIP archive | .zip | Yes | Yes | Read |
| RAR archive | .rar | v3 / v4 / v5 | No (proprietary) | Read |
| 7-Zip archive | .7z | Yes | Yes (LZMA) | Read |
| TAR archive | .tar | Yes | Yes | — |
| GZip | .gz, .tgz | Yes | Yes | — |
| BZip2 | .bz2, .tbz2 | Yes | No | — |
| XZ | .xz, .txz | Yes | No | — |
| CAB | .cab | Yes | No | — |
| ISO disc image | .iso | Yes | No | — |
Need password protection for a new archive?
Use .starkzip. It is the only format where StarkZip can also write encryption — and it hides the file list too, not just the contents.