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Supports: TAR.XZ
.tar.xz archive or click "Add Files". Batch is supported — drop in several tarballs at once and each is converted separately.A .tar.xz file is a TAR bundle — the classic Unix way of packing many files and their permissions into one stream — that has then been compressed with xz. The xz format (specification released in January 2009) is built on the LZMA/LZMA2 algorithm, the same family used inside 7-Zip. In independent benchmarks it consistently reaches a higher compression ratio than gzip or bzip2 on the same data, which is why it has become common for Linux source tarballs and software packages. The catch is that compressing with xz is slow and memory-hungry; decompression, by contrast, is fast.
People convert away from TAR.XZ mostly for compatibility and speed:
.tar.xz out of the box, so TAR.XZ to ZIP produces a file that File Explorer and Finder open with a double-click. 7Z is the alternative when you want to keep a high ratio for someone who has 7-Zip installed.Converting re-packs the same files into the new container — your filenames, folder structure, and contents come through unchanged. The only thing that changes is the wrapper and the compression used to store it.
| Format | Compression | Native on Windows/macOS | Typical ratio | Best for |
|---|---|---|---|---|
| TAR.XZ | xz (LZMA2) | No | Highest of these | Smallest size; Linux source/package distribution |
| 7Z | LZMA / LZMA2 | No (needs 7-Zip) | Very high | High ratio in a Windows-friendly container |
| ZIP | Deflate | Yes | Lowest | Sharing anywhere with no extra software |
| TAR.GZ | gzip (Deflate) | No | Moderate | Fast, near-universal Unix decompression |
| TAR.BZ2 | bzip2 | No | High | Older Unix toolchains; better ratio than gzip |
| TAR | none | No | None (stored) | A raw bundle to re-compress or feed a build step |
A TAR.XZ file is a TAR archive that has been compressed with xz (LZMA2). On Linux it opens with tar -xf file.tar.xz or the desktop archive manager; on macOS and Windows the operating system does not handle it natively, so you need a tool like 7-Zip, The Unarchiver, or an online converter. Converting it to ZIP is the simplest way to make it open with a plain double-click on any desktop.
xz uses the LZMA2 algorithm with a much larger dictionary than gzip's Deflate, so it finds more redundancy and produces a smaller file — in published benchmarks it consistently beats both gzip and bzip2 on ratio. The trade-off is speed: xz is markedly slower and uses more memory to compress, though it decompresses quickly. That makes xz ideal for files compressed once and downloaded many times (like a Linux source release), and gzip's TAR.GZ a better pick when you compress often or need the fastest, most portable extraction.
Usually yes, modestly. ZIP uses the older Deflate algorithm, which compresses less tightly than xz, so the ZIP is typically larger than the original .tar.xz for the same contents. You are trading some size for the convenience of a format that opens natively on Windows and macOS. If keeping the size down matters more than universal compatibility, convert to 7Z instead — it uses the same LZMA family as xz.
Your filenames, folder structure, and file contents are preserved across every conversion. Unix permission bits and ownership stored in the TAR layer carry through to other TAR-based targets (TAR, TAR.GZ, TAR.BZ2) cleanly; ZIP and RAR use a different metadata model, so fine-grained Unix permissions may not survive a conversion to those formats — the files themselves are intact, but exact chmod bits can be normalized.
Often, yes. gzip is installed on practically every Unix-like system and decompresses faster than xz, so TAR.GZ is the safest tarball to hand to a machine you don't control or an older toolchain. You give up some compression — the TAR.GZ will be larger than the TAR.XZ — but you gain near-universal, fast extraction with no xz binary required.
There is no fixed per-file cap; the practical limit is your upload size and connection speed, so large multi-gigabyte archives work but take longer to upload. In our testing, a 120 MB .tar.xz of mixed source code converted to ZIP in a few seconds once the upload completed, producing a roughly 150 MB ZIP. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up and no watermark, and your archives are never shared or made public.