Linux systems rely on TAR for grouping files and preserving permissions, while 7Z is preferred for maximum space saving. This guide compares their structures and best use cases.
7Z uses LZMA/LZMA2 to pack files tightly, utilizing large dictionary sizes. TAR has no compression overhead, making it extremely fast to group directory structures.
| Feature | TAR Archive | 7Z Archive |
|---|---|---|
| Compression | No (bundling only) | Yes (LZMA/LZMA2 standard) |
| Unix Permissions | Preserved natively | Not preserved natively |
| Speed | Instant (no byte calculation) | Slow compression, fast decompression |
| Structure | Sequential blocks | Indexed central headers |
| Licensing | POSIX standard | Open Source (GNU LGPL) |
TAR is native on Unix-like operating systems. 7Z is native to the 7-Zip software but supported globally on PC tools and web decoders.
7Z supports AES-256 password security and header encryption. TAR has no encryption standards.
TAR was created to write files to tape drives sequentially. Compression is added by piping the TAR to tools like Gzip or Xz.
Not natively. To preserve Linux permissions, you should bundle files in a TAR first, and then compress the TAR file into a 7Z archive.
TAR compression speeds depend on the compression level and dictionary sizes used. Generally, TAR uses simpler dictionaries which makes it faster, while 7Z focuses on achieving a tighter compression ratio at the cost of speed.
TAR is supported natively on most systems, while 7Z files often require downloading separate utility apps or using web tools like iLoveExtract to open them.
Yes, both formats support file encryption. However, 7Z typically supports AES-256 encryption, which is much stronger than older encryption algorithms sometimes found in TAR formats.
No, both formats use lossless compression algorithms. Converting between them extracts the files exactly as they are and packages them without losing any data.
TAR files have smaller header sizes, meaning they have less metadata overhead for single files. For large directory structures, 7Z files organize headers more efficiently.
This depends on the formats. Many modern compression formats are open-source, whereas proprietary formats may require licensing or specific software binaries to write files.
The file size exceeds the supported safety limit.