What happens when you convert GZ to TGZ
- The GZ is unpacked in your browser. If it holds a TAR archive, as a .tar.gz does, every file and folder inside is packed into a new TAR with the same structure, which is then compressed with gzip; a plain .gz holds one file, which becomes the only file in the TGZ, under the name stored in the GZ. Nothing is uploaded.
- Files packed into the new TAR get the usual permissions (the owner can read and write, everyone else can read) and today's date, because GZ stores those differently.
- TGZ and TAR.GZ are the same format with two spellings. tar on Mac and Linux, Windows 10 and later, 7-Zip and The Unarchiver all open both.
How to convert GZ to TGZ online
- Press "Choose GZ files" and select one or more files, or drag them onto the box. You can add files of any size your device can hold in memory.
- There are no settings to choose: the converter keeps everything the target format can hold.
- Press "Convert to TGZ". The archive engine, about 1 MB, loads the first time; then the time depends on how much is inside the archive.
- Save each TGZ with its download button. Close the tab and every trace of the files is gone from memory.
Why convert GZ to TGZ?
GZ files usually come from compressed logs, database dumps and downloads, and Linux software as .tar.gz. People convert them to TGZ because TGZ is the usual way to ship files to Linux and Mac servers, and tar unpacks it on every Linux, Mac and Windows 10 or later computer.
In short, GZ is good at what it was made for, and TGZ is the more practical choice when the file has to open, upload or print somewhere else. GZ opens natively on macOS, Linux and Windows 11 since its 2023 update, and with 7-Zip on older Windows, while TGZ opens natively on macOS and Linux, and with 7-Zip on Windows.
How to convert GZ to TGZ on Windows, Mac, iPhone and Android
On Windows
Open this page in Chrome, Edge or Firefox, drag your GZ files in from File Explorer, and press Convert. Each TGZ is saved to your Downloads folder.
On a Mac
Safari, Chrome and Firefox all work. Drag the GZ files from Finder onto the drop zone and the TGZ files land in Downloads.
On iPhone and iPad
Open the page in Safari and tap Choose GZ files. You can pick from Photos or from the Files app. The converted TGZ appears in Files, in the Downloads folder.
On Android
Open the page in Chrome, tap Choose GZ files and pick them from Files or your gallery. The TGZ is saved to the Download folder, where any file manager can find it.
Best settings for GZ to TGZ
There is nothing to set: every file in the GZ is copied into the TGZ as it is.
Large archives are unpacked into your browser's memory, so very big ones, several gigabytes, are better handled by a desktop program such as 7-Zip. Archives split into several parts (.part1.rar, .part2.rar) need all parts, which this tool does not join.
GZ vs TGZ: the differences
| GZ | TGZ | |
|---|---|---|
| Full name | Gzip-compressed file | Gzip-compressed tar archive |
| Type | archive | archive |
| Created by | Jean-loup Gailly and Mark Adler, for the GNU project | the GNU project |
| First released | 1992 | 1992 |
| Compression | Lossless | Lossless |
| What it holds | one file compressed with gzip, often a TAR archive of many files | a TAR archive compressed with gzip |
| In a browser | opens natively on macOS, Linux and Windows 11 since its 2023 update, and with 7-Zip on older Windows | opens natively on macOS and Linux, and with 7-Zip on Windows |
| Common uses | compressed logs, database dumps and downloads, and Linux software as .tar.gz | source code releases and Linux software |
| MIME type | application/gzip | application/gzip |
About GZ and TGZ files
What is a GZ file?
Gzip compresses a single file, not a folder. That is why folders are packed into a TAR first and then gzipped, giving .tar.gz, and why a plain .gz holds exactly one file, usually named like the .gz without its extension.
What is a TGZ file?
TGZ is short for .tar.gz: a TAR bundle compressed as a whole with gzip. It is the standard way Linux and open-source projects distribute source code.
GZ to TGZ not working? Common problems
- The archive will not open. It may be password protected, damaged, or one part of a multi-part archive.
- The browser tab stops on a big archive. Everything is unpacked in memory; very large archives are better handled by 7-Zip or The Unarchiver.
- Files have odd names. Archives made on some older systems store names in a local character set; the files themselves are intact.
Convert GZ to TGZ from the command line
tar packs and compresses in one step once the GZ is extracted; 7-Zip extracts it:
7z x input.gz -oextracted
tar -czf output.tgz -C extracted .The converter on this page does the same job in your browser, without installing anything.
GZ to TGZ converter FAQ
Will I lose quality converting GZ to TGZ?
No. Archives are lossless: every file comes out byte for byte identical.
Why is the TGZ a different size from the GZ?
Different archive formats compress differently, so the TGZ may be larger or smaller than the GZ.
Are my GZ files uploaded anywhere?
No. The conversion runs inside this browser tab using libarchive compiled to WebAssembly and your browser's own gzip compression, so your files stay on your device. You can disconnect from the internet after the page and converter engine have loaded and it still works.
Can I convert several GZ files to TGZ at once?
Yes. Select or drop as many files as you like; they are converted one after another and each gets its own download button.
How do I open a TGZ file?
TGZ opens natively on macOS and Linux, and with 7-Zip on Windows. TGZ is common for source code releases and Linux software.
Is this GZ to TGZ converter free?
Yes. There is no sign-up, no watermark and no limit on how many files you convert. The site is paid for by advertising, and because conversions run on your device there is no server cost per file.
Can I convert GZ to TGZ on my phone?
Yes. The converter works in Safari on iPhone and iPad and in Chrome on Android. Converted files are saved to the Downloads folder.