Free online TAR.XZ to ISO converter

A TAR.XZ package often needs conversion when a disc-burning, virtual-drive, or firmware tool accepts ISO but cannot read compressed TAR archives. The practical process is to decompress and unpack the archive, then build an ISO filesystem from the resulting files.

What the TAR.XZ format is

TAR.XZ is a tar archive compressed with XZ. TAR combines many files into one archive but does not compress them; XZ applies compression to the resulting tar stream.

GNU/Linux distributions, source-code projects, backup scripts, and Unix software commonly create TAR.XZ files with GNU tar. You may encounter them when downloading Linux source packages, archived directories, documentation, or command-line backups. TAR.XZ is an archive format, not a bootable disc image or filesystem image.

What the ISO format is

ISO is a disc-image format that stores a complete filesystem, traditionally ISO 9660 and often Rock Ridge, Joliet, or UDF extensions. Operating systems can mount an ISO as a virtual optical disc, and disc-authoring tools can burn it to CD, DVD, or Blu-ray media.

An ISO is useful when software requires a single disc image, when files must be mounted without unpacking, or when an archive needs to be distributed in a format recognized by optical-media tools. Creating an ISO from TAR.XZ does not preserve XZ compression; the extracted files are stored in the ISO filesystem.

How to convert TAR.XZ to ISO

Linux and macOS with xorriso

Install xorriso using your operating system's package manager. Create a working directory, extract the archive, and build the ISO:

mkdir extracted
 tar -xJf archive.tar.xz -C extracted
 xorriso -as mkisofs -r -J -V ARCHIVE -o archive.iso extracted

Replace archive.tar.xz with the source filename. The -r option adds Rock Ridge metadata for Unix permissions and symbolic links where possible, -J adds Joliet names for Windows compatibility, and -V ARCHIVE sets the ISO volume label. The source directory's contents become the ISO's root directory.

To verify the result without burning it, mount or inspect archive.iso with your operating system's disk-image tools. You can also list its contents with:

xorriso -indev archive.iso -ls /

Windows with 7-Zip and xorriso

Open the .tar.xz file in 7-Zip and extract the inner .tar file. Open that TAR file in 7-Zip and extract its contents to a folder. Run xorriso for Windows against that folder:

xorriso -as mkisofs -r -J -V ARCHIVE -o archive.iso extracted

Use a short, writable output path if Windows reports a command-line or permissions error. A graphical disc-image application that supports creating an ISO from a folder can replace xorriso, but it must create a data ISO from the extracted directory rather than merely rename the TAR.XZ file.

Without installing software

You can convert the file on 101convert.com for free without installing software. The service must still unpack the TAR.XZ contents and generate a new ISO; changing the filename extension alone cannot perform this conversion.

Quality, compatibility, and limitations

• The resulting ISO contains the archive's files, not the original TAR container or XZ compression layer.
• Repacking does not make an ISO bootable. A bootable image requires an El Torito boot catalog and the correct bootloader files; use the source project's ISO-building procedure when bootability matters.
• ISO 9660 has filename and metadata restrictions. Rock Ridge preserves more Unix information on Unix-like systems, while Joliet improves long-name compatibility on Windows.
• File permissions, ownership, hard links, extended attributes, and some symbolic-link behavior may not survive on every target system. Validate critical backups after mounting the ISO.
• The ISO may be larger than the TAR.XZ file because it normally uses little or no general-purpose compression.