Format Atlas

Guides

Choose a compression or disk image format

Decide whether you need to bundle multiple files, compress one stream, or preserve a disk image's structure.

Which format should you choose?

Choose by the role each file plays in your workflow.

  • Bundle several files for distribution → ZIP
  • Compress one file on Unix-like systems → GZIP, BZIP2, or XZ
  • Bundle and compress on Unix-like systems → tar.gz, tar.bz2, or tar.xz
  • Preserve a disk image's structure → ISO

Separate archiving from compression

ZIP can package multiple files. GZIP, BZIP2, and XZ compress a single stream; combine one with tar when multiple files must be packaged on Unix-like systems.

Check the source before extraction

Compressed files and ISO images may contain executables. Confirm the origin and expected size, then inspect the extracted contents before use.

Formats to consider

ZIP

Good for: Distributing multiple files to a broad audience

Less suitable for: Preserving disk structure

GZIP

Good for: Compressing one file or a tar archive

Less suitable for: Bundling multiple files by itself

BZIP2

Good for: Compressing or extracting files in BZIP2-supported workflows

Less suitable for: General delivery when extraction support is unknown

XZ

Good for: Compressing or extracting files in XZ-supported workflows

Less suitable for: Bundling multiple files by itself

ISO Image

Good for: Distributing an image that preserves disk structure

Less suitable for: Ordinary file compression

Before you export

  • Do not infer the contents from the extension alone; inspect the extracted layout.
  • Avoid extracting or running compressed files or ISO images from untrusted sources.

Related comparisons

GZIP vs ZIPGZIP commonly compresses one file, while ZIP can package multiple files and directories together. The right choice depends on whether the recipient needs a bundle, the expected tools, and the delivery workflow.GZIP vs XZGZIP and XZ are lossless compressors commonly applied to a single file. Their practical trade-offs include output size, compression and extraction time, and support on the recipient's systems.BZIP2 vs GZIPBZIP2 and GZIP provide lossless compression for file streams. Actual size, speed, and extraction support depend on the data, settings, and recipient.ISO vs ZIPISO commonly represents a disc image with a filesystem layout that can be mounted or written to media. ZIP is a file archive for bundling and optionally compressing files and directories. They serve different packaging needs even when both contain similar files.TAR vs ZIPTAR and ZIP both bundle multiple files, but TAR is primarily an archive container and commonly pairs with a separate compressor. ZIP combines archiving and compression in one format. Choose based on recipient tools and the workflow.

Guides

Choosing an Archive FormatZIP is a practical first choice for unknown recipients. Consider 7Z when their extraction tools and settings can be confirmed.

References and specifications