ZIP to TZ2

How to Convert ZIP to TZ2 Online

1. Upload Your ZIP File: Drag and drop your .zip archive, or click "+ Add Files" to browse. Multiple ZIPs at once are supported, and the existing folder structure inside each ZIP is preserved.
2. Pick Combine Mode: Under "Combine?" choose Single Archive to merge the contents of every uploaded ZIP into one .tz2, or Individual Archives to produce a separate .tz2 for each input ZIP. The default for ZIP-to-TZ2 is Individual Archives — one output per input — which matches what most users expect when batch-converting.
3. (Optional) Rename the Output: Use the file rename control to give the resulting archive a custom name before download. Helpful when the source ZIP is something generic like download.zip and you want a release-style name such as myproject-1.0.0.tz2.
4. Convert and Download: Click Convert and download the .tz2. Files process in your session and are removed afterward — no watermark, sign-up, or queueing.

Why Convert ZIP to TZ2?

.tz2 is the short, single-token extension for a tar archive compressed in its entirety with bzip2. It is the same format as .tar.bz2, .tbz2, and .tb2 — just a different filename convention. Converting from ZIP is useful when you specifically need the .tz2 spelling, or when the destination toolchain or filesystem is happier with a single-extension archive than a double extension like .tar.bz2.

• Tools and filesystems that dislike double extensions — Some legacy build scripts, FAT32 utilities, mainframe transfer tools, and naive split('.') parsers treat .tar.bz2 as two separate suffixes and mangle the filename. The single-token .tz2 avoids that — basename file.tz2 .tz2 works in one step where .tar.bz2 needs basename file.tar.bz2 .tar.bz2.
• Smaller archives for text-heavy bundles — bzip2 generally beats DEFLATE on natural-language text, source code, and logs because it operates on 100–900 KB blocks with the Burrows–Wheeler transform, rather than ZIP's 32 KB DEFLATE sliding window. Real-world savings of 10–20% over a comparable ZIP are typical; for already-compressed media (JPEG, MP4, etc.) the saving is near zero.
• Preserving Unix permissions and symlinks — tar records the executable bit, file ownership, and symbolic links natively. ZIP can carry Unix permissions through Info-ZIP "extra fields", but Windows-created ZIPs and most browser-zipped folders strip them. Re-packing as .tz2 restores those bits cleanly when the source ZIP carried them.
• Reproducible release archives — A solid-stream .tz2 hashes to a single deterministic SHA-256 digest, which is friendlier for release manifests than ZIP, where re-zipping the same files in a different order can yield a different archive bit-for-bit.
• Legacy GNU and BSD distribution channels — Some FreeBSD ports trees, older SourceForge and GNU project mirrors, and a handful of corporate package mirrors still serve bzip2-compressed tarballs. The .tz2 suffix is recognised by tar, bzip2, 7-Zip, PeaZip, and The Unarchiver alongside .tar.bz2.
• Storage savings on text dumps — A 50 MB ZIP of CSV exports, SQL dumps, or markdown documentation often shrinks to 35–42 MB as .tz2, useful for fitting under enterprise email attachment caps that typically sit at 50–100 MB.

ZIP vs TZ2 — Format Comparison

TZ2 vs Other tar Compression Choices

Pick .tz2 when you want better compression than gzip without bringing in xz's higher decompression memory, and when downstream tooling expects bzip2 specifically. If raw size matters more than compatibility, convert to tar.xz instead. If you need wider tooling support, tar.gz is the safer pick. For the explicit .tar.bz2 filename, use ZIP to TAR.BZ2.

Frequently Asked Questions

Are .tz2, .tbz2, .tb2, and .tar.bz2 actually the same file?

Yes. All four extensions identify a tar archive that has been compressed in its entirety by bzip2 — the bytes inside the file are byte-for-byte identical regardless of which suffix you use. .tar.bz2 is the canonical Linux/Unix form; .tbz2 and .tb2 are short forms used where tools or filesystems dislike double extensions; .tz2 is the rarest of the four but valid and recognised by tar, 7-Zip, PeaZip, and The Unarchiver. You can rename a .tar.bz2 to .tz2 (or vice versa) and every standard archiver will still open it.

Will the TZ2 actually be smaller than my ZIP?

Usually, but not always. Bzip2 generally beats DEFLATE on text, code, JSON, XML, CSV, and log data — savings of 10–20% are typical. For archives dominated by already-compressed content (JPEG, PNG, MP4, MP3, Office .docx/.xlsx, other ZIPs), bzip2 has nothing left to squeeze and the .tz2 may end up the same size or marginally larger than the input ZIP because of tar header overhead.

How do I extract a .tz2 file once I've downloaded it?

On Linux or macOS Terminal: tar -xjf archive.tz2 works because -j invokes bzip2; modern GNU tar (1.15+) also accepts plain tar -xf archive.tz2 and auto-detects the compression. On Windows, 7-Zip and PeaZip both open .tz2 natively in two steps (decompress the bzip2 layer, then extract the tar). macOS Finder does not open .tz2 directly — use The Unarchiver or Keka.

Why pick .tz2 over the .tar.bz2 spelling?

Functionally there is no difference, but the single-token .tz2 avoids problems with naive parsers that split filenames on . and treat .tar.bz2 as two separate suffixes. It also keeps filenames shorter — handy for long base names that already push against 255-byte filesystem limits (ext4, NTFS) — and works around legacy FAT32 and SMB shares that sometimes mishandle compound extensions. If your toolchain accepts both, .tar.bz2 is the more conventional choice; if it specifically requested .tz2, this conversion produces it directly.

Will Unix file permissions and symlinks survive the conversion?

The output .tz2 records permissions and symlinks natively in the tar header, but the converter can only preserve what the source ZIP carried. If your ZIP was created on Linux with zip -y (which writes Info-ZIP extras), executable bits and symlinks come through. If it was created with Windows Explorer's "Send to → Compressed (zipped) folder", permissions were never recorded in the first place — extracted files default to 0644 and you will need to chmod +x any executables manually after extraction.

Why would I pick TZ2 over TAR.GZ in 2026?

Bzip2 typically gives a ~10–15% size reduction over gzip on text and source code, at the cost of being 3–5× slower to compress and noticeably slower to decompress. Pick .tz2 when downstream tooling explicitly expects bzip2 (some legacy GNU projects, older Debian source packages, certain FreeBSD ports), or when you are shipping a one-time bundle and the size saving matters more than CPU time. For new projects where decompression speed matters most, gzip is faster and more compatible; for tightest compression, xz wins.

Can I bundle several ZIPs into a single TZ2?

Yes. Upload all the ZIPs and choose Single Archive under "Combine?". The tool extracts each ZIP and combines the contents into one .tz2, deduplicating directory headers where they overlap. If you would rather keep each ZIP's contents under a separate top-level folder, rename the inputs first so each contributes a uniquely-named root directory, or convert them one at a time.

Does TZ2 support encryption or password protection?

No. Neither tar nor bzip2 has a built-in encryption layer — the bzip2 step is pure compression. ZIP files can be password-protected (ZipCrypto or AES-256 with WinZip/7-Zip), but those passwords do not carry over into a .tz2 because the format simply cannot represent them. If you need an encrypted archive on the Unix side, the conventional approach is to encrypt the .tz2 separately with gpg --symmetric file.tz2 or age, producing file.tz2.gpg.

Is TZ2 still relevant, or has XZ replaced it?

It has been displaced from the top tier — kernel.org started publishing .tar.xz alongside .tar.bz2 in late 2013 and most modern distros now prefer .tar.xz for package archives. But bzip2-compressed tarballs (under any of .tar.bz2, .tbz2, .tb2, or .tz2) remain common in older GNU project releases, FreeBSD ports, and any environment where xz's higher decompression memory or harder-to-parallelise compression is a problem. If your toolchain or recipient specifically asked for bzip2, this conversion is the right call; otherwise weigh tar.xz for size or tar.gz for ubiquity.

Need to go the other direction?

Use TZ2 to ZIP for a Windows-friendly archive. To convert from a different source, see 7Z to TZ2 or RAR to TZ2.