Convert Gzip Compressed Archive (.gz) to Gzipped Tar Archive (.targz) online for free. Fast, secure archive conversion with no watermarks or registration.
Upload your .gz file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .tar.gz file when it's ready.
GZ (Gzip) compresses a single file using the DEFLATE algorithm. A bare .gz file wraps exactly one compressed data stream — it does not bundle multiple files or preserve directory structure on its own. TAR.GZ (tarball) combines the TAR archiver with gzip compression, creating a single compressed archive that contains a full file tree with directory structure, permissions, and metadata.
Converting a standalone .gz file to a proper .tar.gz wraps the decompressed content in a tar archive before recompressing with gzip. This transforms a single compressed file into a standards-compliant tarball that follows the conventions expected by package managers, build systems, and source distribution platforms. If the .gz already wraps a tar archive, this conversion normalizes the output filename and structure.
Many tools and platforms distinguish between bare .gz files and proper .tar.gz tarballs. Package managers (npm, pip, gem) expect .tar.gz files with specific internal structure. Build systems look for tarballs, not standalone compressed files. GitHub release assets conventionally use .tar.gz format with a top-level project directory.
A bare .gz file also loses all metadata beyond the filename — there are no permissions, no timestamps beyond mtime, and no directory structure. Wrapping the content in TAR before gzip compression adds proper metadata preservation. This makes the output self-documenting and suitable for distribution contexts where a bare compressed file would be ambiguous or insufficient.
The gzip stream is decompressed to recover the original file data. A POSIX tar archive is created containing the decompressed file as a single entry (or multiple entries if the original .gz contained tar data). The tar stream is then compressed with gzip at the standard compression level. The output follows the conventional .tar.gz structure: tar header blocks (512 bytes each with filename, size, permissions, timestamps, checksum) followed by file data blocks, all wrapped in a gzip DEFLATE stream with CRC32 verification.
Completely lossless. The file content from the original .gz is preserved byte-for-byte in the .tar.gz output. The tar layer adds metadata (permissions, timestamps, ownership) without altering the actual file data. The gzip compression is reapplied to the tar stream, producing the same DEFLATE-compressed output with identical decompressed content.
| Device | GZ | TAR.GZ |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
GZ to TAR.GZ conversion wraps standalone gzip-compressed files in a proper tar archive, adding metadata preservation and standards compliance for distribution platforms, build systems, and package managers.
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| No |
| Funktion | GZ | TAR.GZ |
|---|---|---|
| Fulde navn | Gzip Compressed File | Gzipped Tar Archive |
| Filendelse | .gz | .tar.gz |
| Bedst til | DEFLATE compression | TAR + gzip |