.tbz File Extension

What kind of file is a .tbz?

A .tbz file is normally a TAR archive compressed with Bzip2. TAR supplies the member names, directory structure, permissions, and other archive metadata. Bzip2 then compresses that entire TAR byte stream losslessly. The result is also commonly named .tbz2 or .tar.bz2.

The usual MIME label is application/x-bzip2, an unregistered but widely used media type.¹ A genuine Bzip2 stream starts with ASCII BZh, hexadecimal 42 5A 68, followed by a digit from 1 through 9. The digit records a block size from 100,000 to 900,000 bytes.² After decompression, a normal .tbz payload has a TAR header rather than opening as an individual document.

How do I open a .tbz on my computer?

• On Windows, use 7-Zip or PeaZip to inspect and extract the archive.
• On macOS, double-click it to try Archive Utility, or use tar in Terminal. Apple's shell scripting guide identifies .tbz as a Bzip2-compressed tar archive suffix.³
• On Linux, GNU tar can identify the compression and extract the TAR members. Many desktop archive managers provide a graphical alternative.⁴

Inspect an unfamiliar archive before extracting it. With GNU tar, tar -tjf package.tbz lists the members and tar -xjf package.tbz -C empty-directory extracts them into a chosen directory. Review absolute paths, parent-directory references, symbolic links, and executables before writing anything outside an isolated folder.

Poly support for .tbz

Poly stores, syncs, shares, versions, and downloads .tbz files, and makes them searchable by filename and ordinary file properties. Poly does not currently infer Bzip2 from the .tbz suffix, decompress the stream, preview the archive, index member names or contents, or give the Poly agent access to files inside it.

Download the archive and extract it with a trusted local utility when you need its contents. Add the extracted files to Poly separately to receive the preview, search, metadata, and agent features available for their formats.

History of .tbz

Julian Seward released Bzip2 0.15 in July 1996, followed by the stable 1.0 line in 2000.⁵ Bzip2 replaced his earlier, incompatible bzip compressor and combined the Burrows-Wheeler block-sorting transform with Huffman coding.²

The compact .tbz suffix indicates the same two-layer arrangement as .tar.bz2: a TAR container inside Bzip2 compression. The Bzip2 1.0.8 manual recognizes .tbz and .tbz2 as TAR-related endings and restores either to a .tar filename during decompression.²

Working with .tbz and alternatives

Choose a package format based on who must open it:

Bzip2's CRC detects accidental corruption, but it does not authenticate the archive or make its members safe. Compressed data can expand substantially. Apply storage and time limits to untrusted files, and preserve important originals. Converting to ZIP or another tarball requires extraction or decompression followed by creation of a new archive. Changing only the suffix changes no bytes.